Search

The current research explores the outcome of europium doping on the structure, morphology, electrical conductivity and optoelectronic characteristics of SnS2 thin films deposited on glass substrates by nebulizer spray technique. X-ray diffraction analysis substantiates the presence of hexagonal structure in both pure and Eu-doped SnS2 thin films with the highly preferred orientation diffracted from the plane (002). It shows the intensity of the predominant peak is highest for 2% Eu-doped SnS2 thin film. From the XRD data, the crystallite size was found to be highest for 2% SnS2:Eu, and same sample showed a less dislocation density of 0.97 × 1015 lines/m2 and microstrain of 0.081 × 10–3/lines2 m4. The crystallite size first increases with increasing doping concentration of Eu (0–2%), then decreases for higher concentrations. The SEM and AFM micro images reveal the agglomeration of grains at higher Eu concentration. The compositional analysis through EDAX studies supports the presence of Eu, Sn and S. The SnS2 optical band gap value is found to vary from 2.70 to 2.91 eV as the Eu doping is increased from 2 to 6%. All the SnS2 thin film samples manifest a n-type conductivity as authenticated from Hall studies and a low resistivity of 4.34 × 10−1 cm with an elevated carrier concentration of 5.43 × 1017 cm−3, respectively, was observed for SnS2:Eu (2 wt%). The same sample established a higher responsivity (41.64 × 10−3 AW−1), competent external quantum efficiency (97.24%), and a better detectivity (40.88 × 108 Jones). Hence, the 2% Eu-doped SnS2 film is recognized to be best suited for the fabrication of high-speed optoelectronic devices. This paper also discusses a putative mechanism for photo-detector performance under air and UV radiation. [ABSTRACT FROM AUTHOR]

SrAl4O7 nano phosphors doped with different weight percentages of europium (1, 3, 5, and 12 wt%) were successfully synthesized using the sol-gel method. The phase purity of the synthesized samples was confirmed by powder X-ray diffraction and the average crystallite size increased with an increase in dopant concentration of europium. The band gap value increases with an increase in the dopant concentrations of europium in SrAl4O7. The decay kinetics and luminescence spectra of materials doped with Eu3+ were strongly concentration-dependent. TG curves show the decomposition of the organic compounds in the precursors together with the evaluation of great amounts of gases and crystallization of SrAl4O7. DSC curves show the breakdown of loosely bound organic molecules, the elimination of water molecules, and other surface dangling bonds responsible for the endothermic peaks. The dielectric constant decreases with an increase in frequency. The outcomes of these investigations made the focused materials worthy of applications in energy storage devices, solar cells, and lighting technology. Highlights: Eu doped SrAl4O7 nano phosphors were successfully synthesized by sol-gel method. Band gap energy increases with an increase in Eu dopant concentrations. 12 wt% of Eu-doped SrAl4O7 nano phosphor shows a decrease in phosphorescence emission intensity due to the quenching effect. Thermal effects on prepared nano phosphors revealed that these materials have high stability and homogeneity. These synthesized nano phosphors can be applied for high-frequency devices or power applications, solar cells, and other energy storage applications due to their low dielectric constants at higher frequencies which results in minimal electric power loss. [ABSTRACT FROM AUTHOR]

Doped with high-quality neodymium ions, poly(methyl methacrylate) (PMMA) [(PMMA)-x wt% Nd3+] by using the traditional solution casting method, polymeric composite films with [x = 0, 0.025, 0.1, 0.25, 1.25, and 2.5 wt%] were formed. The XRD, SEM, UV–Vis–NIR, and electrical characteristics were used to characterize the films. According to XRD research, some interactions between PMMA and Nd2O3 result in a decrease in composite crystallinity. According to SEM, Nd2O3 particles were uniformly distributed throughout the host matrix. With Nd2O3 filler rose, the size of the particles also increased, leading to rising agglomeration. Incorporating Nd3+ ions into the polymer chains of (PMMA) significantly changed the optical energy gaps, causing the indirect optical gap to fall from 4.82 to 4.47 eV and the direct optical gap to drop from 4.98 to 4.85 eV. The behavior of the Urbach energy is the opposite of that of the bandgap energy. Additionally, the measured dielectric constant of the investigated composites showed a very alluring dielectric constant for the dielectric media. The examined films' dielectric constant and dielectric loss both decline exponentially as the incident frequency rises, while their AC electrical conductivity enhances as the Nd3+-ions content rises. The produced sheets were then used in the artificial UV-induced photodegradation of Methylene Blue. They demonstrated good potential for immobilizing Nd3+ for the photodegradation of contaminants typically present in water. [ABSTRACT FROM AUTHOR]

Present paper reports the modification in band gap and structure of CdS(∼2.4 eV) and formation of a new ternary semiconducting material. The band gap tailoring is done by preparing a mixed lattice with different concentration of a low-band-gap material, NiS­­ (∼0.8 eV), which leads to the formation of new set of materials. New ternary, having tunable band gap has potential application in photovoltaic devices. The optical-absorption studies showed shift in band edge towards higher wavelength. The band gap calculation was done using Tauc relation, which showed that with variation of x in Cd(1-x)NixS, band gap could be tailored as low as ∼1.7 eV for x = 0.05. Larger concentration of Ni may yield further shift in band gap. [ABSTRACT FROM AUTHOR]

This paper reports the thermoluminescence (TL), optical absorption and other laser Raman scattering studies performed on terbium-doped KI crystals γ-irradiated at room temperature. Photoluminescence studies confirm the presence of terbium ions in the KI matrix in their trivalent form. Formation of V3- and Z1-centres on F-bleaching of γ-irradiated crystals was observed. The characteristic emission due to Tb3+ ions in the spectral distribution under optically stimulated emission and TL emission confirms the participation of the Tb3+ ions in the recombination process. The Raman bands were identified as the totally symmetric vibration modes of f.c.c. species KI:Tb3+. [ABSTRACT FROM AUTHOR]

CdS thin films were deposited on glass substrates employing low-cost and low-temperature chemical bath deposition (CBD). The effect of deposition time on the fabricated sample's properties was investigated by XRD, SEM, EDX, Raman, UV-vis spectrophotometry, and PL spectroscopy. XRD results indicate the formation of cubic and hexagonal structures of CdS thin films. The calculated average crystal size ranged from 21–50 nm. SEM results indicate the formation of hierarchical nanoflakes where the nanoflakes are entangled with one another like plant roots. Raman study confirmed that the fabricated thin films have two distinct peaks that are centered at 298 cm−1 and 599 cm−1, which are characteristic vibration modes for CdS thin film. UV-vis absorption spectra indicate absorption band edges near 500 nm, which are related to the band gap values of CdS thin films. The estimated Eg of CdS thin films was reduced from 2.4 to 2.22 eV as the deposition time increased from 5 to 60 min. PL results show the main peak centered at 537 nm, its intensity decreasing as deposition time increases, indicating lower recombination of charge carriers. Our results reveal that CdS thin films are an excellent candidate for optoelectronic applications. [ABSTRACT FROM AUTHOR]

Single crystals of an efficient nonlinear optical material 2-amino 5-methylp yridinium 4-methoxybenzoate (2A5MP4MB) have been grown successfully from the aqueous solution by slow evaporation technique. Single crystal XRD reveals that the crystal belongs to monoclinic system with the space group P2 1 /c. The various functional groups present in the material were ascertained by FT-IR spectral studies. The UV–Visible NIR spectrum of 2A5MP4MB shows excellent transmittance in the entire UV visible and near IR region with a lower cut off wavelength of 269 nm. The photoluminescence spectrum confirms the photon excitation process and wide band gap of the 2A5MP4MB crystal. The dielectric study on 2A5MP4MB crystal reveals normal dielectric behavior and the optical quality of the grown crystal for device applications. The laser damage threshold value of 2A5MP4MB crystal was estimated to be 4.11 GW/cm2. The third-order nonlinear optical parameters were calculated by Z-scan technique using 532 nm diode pumped CW Nd: YAG Laser and the results of the studies are discussed detail in this paper. • Bulk single crystal of size 28 × 20 × 5 mm3 for devices. • Large photonic band gap of 4.7 eV for photonic devices. • Higher thermal stability of 178 °C without decomposition and water of crystallization. • Large damage threshold of 4.11 GW/cm2 for good quality devices. • Effective electron transfer and proton transfer mechanism of hetero intermolecular hydrogen bonding interactions. [ABSTRACT FROM AUTHOR]

A new organic–inorganic material, dimethylaminium hexabromobismuthate (C2H8N)3BiBr6 was elaborated by the slow evaporation technique at room temperature. This compound is synthesized and characterized by X-ray diffraction, Raman spectroscopy scattering, Hirshfeld surface analysis, 13C NMR spectroscopy, photoluminescence and by UV–Vis spectroscopy. The crystal lattice is formed by discrete [BiBr6]3− anions surrounded by dimethylaminium cations. Besides, the title compound crystallizes in the space group R 3 ¯ of trigonal system. The unit cell parameters are a = 29.3387(9) Å, b = 29.3387(9) Å and c = 8.4642(3) Å. The Raman and infrared spectra recorded at room temperature were interpreted by analogy with homologous materials. The cohesion of the structure is ensured by a huge network of N–H...Br hydrogen bonds and van der Waals interaction (C–H....Cl). The UV–Vis measurements, performed from 200 to 2400 nm, show a direct and wide optical bandgap evaluated at (2.840 ± 0.005), (2.482 ± 0.004) and (2.805 ± 0.006) eV by different methods. The Urbach energy presents a low value estimated at (182 ± 3) meV confirming the high quality of our compound. In addition, the evolution of the extinction coefficient (ke) and the refractive index n with the wavelength λ were determined. Furthermore, we have demonstrated that n obeys to Cauchy relation. Other optical parameters such as the skin depth and the optical conductivity were calculated, and all obtained results were discussed. We have demonstrated, in addition, that the energy losses are mainly in the bulk rather than the surface of the studied material. Based on the Wemple–Di-Domenico model, the dispersion parameters E0 and Ed relative to the (C2H8N)3BiBr6 sample were calculated. These encouraging results such as the obtained high and direct optical bandgap value prompt us to propose this compound as a basic material for optoelectronic devices. [ABSTRACT FROM AUTHOR]

Coordination complexes represent one of the most investigated and used non-linear optic materials thanks to the metal center's ability to provide a wide range of non-linear optical structures. Thus, the present paper is interested in the growth of a novel organometallic nonlinear-optical crystal, Bis(4-aminobenzenesulfonate)triaquatrinitrato lanthanum (III) (4ABTATNL),[La(C 6 H 6 NSO 3 H) 2 (NO 3) 3 (H 2 O) 3 ] from an aqueous solution via slow evaporation method. Next, its structural, thermal and non-linear optical properties were assessed using X-ray diffraction (XRD), UV–Visible, Fourier transformed infrared spectroscopy (FTIR), energy dispersive X-ray spectroscopy (EDX), Thermo-gravimetric analysis (TGA), and Second Harmonic Generation (SHG). It was discovered from XRD, that the title compound adheres to the monoclinic crystallographic system with the centrosymmetric space group P2 1 /c. Its UV wavelength corresponding to the absorption at 248 nm revealed a good optical transparency. Regarding the FT-IR spectrum, it identified the characteristic absorption bands. As for the stability of the organometallic crystal, it was also evaluated by means of the thermo-gravimetric analysis (TGA). With respect to the second-order nonlinear optical (NLO) property of 4ABTATNL complex, it was determined by Kurtz-Perry technique. The crystalline KDP was used as a comparative material for the SHG measurements. It was found that efficiency SHG exhibited about 1.28 times than crystal KDP. Besides, the values of initial hyperpolarizability and polarizability were calculated in order to assess the nonlinear optical behavior of the examined compounds. [Display omitted] [ABSTRACT FROM AUTHOR]

Optically transparent formic acid (FA) doped potassium dihydrogen phosphate (KDP) crystal of dimension 21×15×9 mm3 has been grown by slow evaporation solution technique (SEST). The X-ray diffraction (XRD) technique was used to confirm the cell parameters and the shifts in peak positions of identified reflecting planes. The incorporation of FA in KDP has been qualitatively analyzed by fourier transform infrared analysis. The UV-visible absorption spectrum of crystals has been recorded in the range of 200 to 900 nm and the doped KDP crystal is found to have improved optical parameters than pure KDP. The color centered photoluminescence emission spectrum of grown crystal has been illustrated in visible region. The mechanical behavior of pure and doped KDP crystal has been investigated using the Vicker's microhardness analyzer and hardness parameters have been calculated. The effect of FA on thermal stability of KDP crystal was examined by means of thermogravimetric and differential thermal analysis. The temperature dependent dielectric behavior of crystals was studied. [ABSTRACT FROM AUTHOR]

Abstract: Cu(InAl)Se2 (CIAS) thin films have been prepared by successive ionic layer adsorption and reaction (SILAR) technique on well-cleaned glass substrates. The structure, composition, morphology, optical, electrical, and Hall effect studies of prepared thin films have been studied. X-ray diffraction studies confirmed the polycrystalline nature of the thin films with a chalcopyrite structure. Scanning electron microscopy studies revealed that the morphology of the prepared films was smooth, dense, uniform, and granular. Composition of various constituents such as Cu, In, Al, and Se in the CIAS films has been determined from energy dispersive x-ray analysis. Optical properties have been studied in detail from the transmittance spectra in the visible and near infrared region and the optical transition has been found to be direct and allowed with the band gap of around 1.16–1.50eV. Electrical analysis helps to identify that in high temperature region the conductivity is attributed due to thermal excitation of the charge carriers from grain boundaries to the neutral region of the grains. Transport properties of CIAS thin films have been studied in the temperature range 298–398 K and the transport parameters are evaluated and reported in this paper in detail. [Copyright &y& Elsevier]

Abstract: This paper presents the synthesis and crystal growth of optically non-linear semi-organic crystal potassiumtetrakisthioureabromide (KTTB) using water and a mixture of acetone and water (1:1) by slow evaporation of aqueous solution at room temperature. The solubility has been determined in both the solvents at various temperatures. The compound crystallizes in non-centrosymmetric space group P41. The crystalline perfection of the grown crystals has been analysed by high-resolution X-ray diffraction measurements. The IR and polarized Raman spectra have been interpreted using both the factor group analysis. The results of the correlation field splitting of the thiourea internal vibrations are discussed. The optical characterization of the crystal shows the cut off wavelength near the UV region. Also the crystal shows good propensity to emit second harmonic generation of Nd:YAG laser. [Copyright &y& Elsevier]

Ammonium dihydrogen phosphate (ADP) crystal utilizes several applications such as Q-switching, electro-optical, and second harmonic generation in nonlinear optics. In the present article, a good-quality single crystal of ADP was grown via Sankaranarayanan–Ramasamy (SR) method for the dimension of 120 mm in length and 12 mm in diameter. The grown ADP crystal is used for diverse characterizations like FTIR spectral study, Vickers microhardness, second harmonic generation, photoluminescence, and chemical etching analysis. The photoacoustic spectroscopy analysis was used to study the thermal diffusivity of the sample. Thermal transport properties of the crystal are required for all types of heat transfer incidences and furthermore used in several applications like acousto-optical, Nd:YAG, and Nd:YLF lasers. A dielectric property was investigated for the grown crystal with dissimilar temperatures, and it was apt for electro-optical and Q-switching applications. [ABSTRACT FROM AUTHOR]

Imidazolinium l-tartrate (IMLT) crystals and l-histidine-doped IMLT crystals were grown by slow evaporation technique at room temperature. The powder x-ray diffraction technique confirms the lattice parameters and shifts in the peak positions attributed to the dopant l-histidine. The Fourier transform infrared (FTIR) spectrum reveals the assignments of characteristic bondings present in the grown crystals. The frequency-dependent dielectric constant and dielectric loss of pure and l-histidine-doped IMLT crystals have been investigated by the dielectric measurements. Doping has improved the optical parameters and was studied using UV–Vis-near infrared (NIR) spectral studies. The cut-off wavelengths of pure and 1 mol.% l-histidine-doped IMLT crystals were observed at 234 nm and 229 nm, respectively. The etching study examines the growth mechanism and surface morphology of the pure and l-histidine-doped IMLT crystals. The carbon-hydrogen-nitrogen (CHN) analysis conveys the percentage of carbon, hydrogen and nitrogen elements present in pure and l-histidine-doped IMLT crystals. The consequences of doping l-histidine in IMLT single crystal and their dominance in various properties of the crystal grown in aqueous solution by slow evaporation technique have been explored. [ABSTRACT FROM AUTHOR]

A novel tris (thiourea) potassium barium sulphate (TTPBS) complex has been synthesized and the complex formation was confirmed by means of spectroscopic analysis. The TTPBS single crystal has been grown by most commercial slow solvent evaporation method. The single crystal X-ray diffraction technique has been employed to confirm the crystal structure and unit cell dimensions of TTPBS crystal. The functional groups of grown crystal have been identified by means of Fourier transform infrared analysis. The constituent elements of title crystal have been determined by means of EDS technique. In UV-visible studies the TTPBS crystal has been testified within 200-900 nm to examine the optical transparency and determine the optical band gap. The frequency conversion efficiency of TTPBS crystal has been assessed by means of Kurtz-Perry test. He-Ne laser assisted Z-scan technique has been employed to ascertain the third order nonlinear optical (TONLO) refraction and absorption effect in TTPBS crystal. The magnitude of TONLO refractive index (n 2), absorption coefficient (β) and susceptibility (χ3) of title crystal has been illustrated using the Z-scan data. The Nd:YAG laser facilitated surface damage threshold of TTPBS crystal has been determined and it is found to be in MW/cm2 range. [ABSTRACT FROM AUTHOR]

2-phenylethylaminium 5-sulfosalicylate (2PE5S) compound was successfully synthesised and single crystals were grown by slow evaporation method. High resolution X-ray diffraction analysis revealed the crystal perfection of the grown crystal. The presence of functional groups of 2PE5S compound was confirmed by FTIR analysis. The thermal stability was examined for the grown crystal. UV-visible and photoluminescence studies were carried out for the grown crystal to estimate the optical transmittance, lower cut-off wavelength, band gap and emission region respectively. The laser damage threshold and third order nonlinear optical susceptibility (χ3) of 2PE5S crystal were evaluated by LDT and Z-scan techniques. [ABSTRACT FROM AUTHOR]

Optical quality single crystals of α- and γ-polymorph of glycine with respective dimension of 16 × 04 × 04 and 16 × 14 × 08 mm3 have been grown from slow solvent evaporation technique. The single crystal X-ray diffraction (XRD) study has been carried out to confirm the cell parameters, crystal structure and space group of grown polymorphs of glycine crystal. The powder XRD analysis has been performed to investigate the crystalline nature of γ-glycine crystal. The UV-visible spectral analysis has been carried out in the range of 200-900 nm to determine the optical transmittance and band gap of grown crystals. In Kurtz-Perry test, the second harmonic generation efficiency of γ-glycine crystal is found to be 1.4 times higher than KDP crystal material. The emission profile and electronic purity of grown crystals has been examined by means of photoluminescence study. The differential thermal analysis of grown crystals has been undertaken to determine the melting point of grown polymorphs of glycine crystal. The temperature dependent behavior of dielectric parameters of grown crystals has been comparatively investigated within 35-90 °C by means of dielectric analysis. [ABSTRACT FROM AUTHOR]

Single crystals of semi organic pure and malic acid doped lithium sulfate monohydrate oxalate have been grown at ambient temperature by slow evaporation method using aqueous solution. The single crystal and powder X-ray diffraction techniques were employed to determine the crystallinity, crystal structure and lattice parameters of the grown crystals. The UV-Visible Spectral study revealed the improved transparency in the visible region of the doped crystal ascertaining the inclusion of malic acid. Fourier transform infrared spectral analysis was employed to identify the presence of a various functional groups. The Energy Dispersive X ray analysis was used to find the chemical compositions of the grown crystals. It proved the presence of dopant in the grown crystal. The Vickers microhardness test confirmed the higher hardness value of the crystals. [ABSTRACT FROM AUTHOR]

In present investigation, crystals of pure and Nd3+doped zinc tris-thiourea sulphate (ZTS) material have been grown from aqueous solution at room temperature by employing slow evaporation technique. The incorporation of Nd3+in ZTS crystal complex has been qualitatively determined by means of energy-dispersive spectroscopic technique. The crystalline phase and structural parameters of grown crystals have been confirmed by powder X-ray diffraction technique. The influence of Nd3+on optical transparency of ZTS crystal has been examined in the range of 190–1100 nm. The transmittance data have been used to evaluate the vital optical constants (extinction coefficient, refractive index and reflectance) of grown crystals to discuss the utility for distinct optical applications. The enhancement in SHG efficiency of Nd3+doped ZTS crystal has been confirmed by Kurtz–Perry powder test. The nature of dielectric constant and dielectric loss of pure and Nd3+doped ZTS crystal has been comparatively investigated in the temperature range of 35–110 °C. 1. Growth of pure and Nd3+doped ZTS crystal is reported for the first time 2. XRD analysis confirmed good crystalline nature of Nd3+doped ZTS crystal 3. Nd3+significantly improved the linear optical response of ZTS crystal 4. Enhanced SHG efficiency of Nd3+doped ZTS crystal is 1.4 times that of ZTS crystal 5. Lower dielectrics of Nd3+doped ZTS crystal are vital for optoelectronics applications [ABSTRACT FROM PUBLISHER]

A nonlinear optical material benzoyl valine (BV) was synthesized by the technique of slow evaporation process at room temperature. The single crystal X ray diffraction analysis evince that crystal corresponds to acentric space group P21 with monoclinic system. The diverse optical properties assured an elevated transparency in BV crystal. Photoluminescence profile revealed the suitability of crystal for fabricating violet lasers. The Laser damage threshold and the dielectric behavior of the grown crystal were analyzed to indicate its practical applications. The second and third order nonlinear optical measurements were studied to prove its potentiality in the domain of nonlinear optical applications. [ABSTRACT FROM AUTHOR]

We aimed to investigate the influence potassium tetra thiourea chloride (PTTC) on optical, dielectric and thermal properties of potassium dihydrogen phosphate (KDP) crystals. It was found that by addition of PTTC SHG efficiency has been enhanced. In addition, third order nonlinear properties have been studied by open and close aperture Z-scan technique. The enhanced LDT of grown crystal is found to be 2.08 GW/cm2. The dielectric response of grown crystal results lowers magnitudes. Thermal stability of grown crystal has been studied by TGA, DTA and DSC. The mechanical strength of doped crystals has been investigated by the Vickers microhardness studies and results are discussed. [ABSTRACT FROM PUBLISHER]

Single crystals of maleic acid (MA)- and oxalic acid (OA)-doped potassium dihydrogen phosphate (KDP) materials have been grown by slow evaporation solution technique. The structural parameters of the grown crystals have been determined using the single crystal X-ray diffraction technique. Fourier transform infrared analysis has been done to identify the functional groups of grown crystals. The modifications in optical transmittance, optical band gap and different optical constants of KDP crystal due to addition of MA and OA have been investigated by means of UV–Visible spectral analysis. The Vicker’s microhardness studies have been carried out to examine the mechanical behaviour of pure and doped KDP crystals. The influence of dopants on thermal stability of KDP crystal has been investigated using the thermogravimetric and differential thermal analysis. The dielectric constant, dielectric loss, ac resistivity and ac conductivity of pure and doped KDP crystals were evaluated under dielectric studies. [ABSTRACT FROM PUBLISHER]

Single crystals of pure and cadmium-doped lithium sulphate monohydrate (LSMH) have been grown from aqueous solution by slow evaporation solution growth technique. The effect of metallic incorporation (Cd2+) on the crystal growth and characteristic properties of LSMH single crystal was studied. The grown crystals are subjected to powder X-ray diffraction studies to explore the structural properties of the pure and doped crystals. The dopant concentration of the crystal is estimated by inductively coupled plasma-optical emission spectroscopy. The crystal showed a 20% transmission enhancement on doping with Cd. Photoluminescence studies showed a violet fluorescence emission peak at 395 nm. The photoluminescence intensity of Cd-doped LSMH increased significantly to about 1.5 times that of pure LSMH. Laser damage threshold value and second-harmonic conversion efficiency of the grown crystals has been determined using Nd:YAG laser operating at 532 and 1064 nm, respectively. The multiple shot surface laser damage thresholds for pure and Cd-doped LSMH are found to be 6.9 GW/cm2and 8.6 GW/cm2, respectively. Low dielectric loss and high dielectric constant shows that the grown crystal contains minimum defects. [ABSTRACT FROM AUTHOR]

In the present investigation, glycine has been doped in bis-thiourea cadmium formate (BTCF) and single crystal was grown by slow solution evaporation technique. The incorporation of glycine in BTCF crystal was confirmed by Fourier transform infrared (FTIR) analysis. The UV-visible transmittance spectrum of pure and doped BTCF crystals was recorded to comparatively analyse the optical transparency, optical bandgap and other optical constants. The third-order non-linear behaviour of grown crystals has been investigated at 632.8 nm using Z-scan technique, and vital third-order non-linear optical (NLO) constants were calculated. The second harmonic generation (SHG) efficiency of doped BTCF crystal is found to be 2.15 times that of KDP material. The fluorescence studies of doped BTCF crystal confirmed the red colour emission in the visible region. The thermal stability of grown crystals was determined by means of thermogravimetric analysis (TGA). The dielectric measurement studies were performed at room temperature. The surface morphology of doped BTCF crystal was analysed by scanning electron microscopy (SEM) technique. [ABSTRACT FROM AUTHOR]