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Chiral materials with circularly polarized luminescence (CPL) are currently attracting great attention for their wide applications in bioresponsive imaging, 3D displays, and storage of information. Herein, CPL‐active enantiomorphic hybrids (R)‐ and (S)‐C6H15Cl2NO⋅SbCl5 are obtained by self‐assembling chiral R/S‐(3‐chloro‐2‐hydroxypropyl)trimethylammonium chloride with antimony(III) chloride, giving a 0D structure with SbCl5 pyramids isolated by (3‐chloro‐2‐hydroxypropyl)trimethylammonium chloride cations. The formed enantiomers exhibit brilliant orange emission peaked at 604 nm with photoluminescence quantum yield as high as 71.2%, originating from the self‐trapped exciton emission demonstrated by photophysical characterization. Due to the existence of chiral organic cations, the enantiomers exhibit strong chiral‐optical properties with mirror‐image circular dichroism signals in ground state and obvious CPL activity with the dissymmetry factor glum of 2.5 × 10−4 and −1.6 × 10−4 for R‐type and S‐type, respectively. It should be mentioned that these are the first reported 0D hybrids with CPL‐activity. This work paves an avenue for developing eco‐friendly CPL materials with highly ‐efficient luminescence. [ABSTRACT FROM AUTHOR]

As low‐dimensional lead‐free hybrids with higher stability and lower toxicity than those of three‐dimensional lead perovskites, organic antimony(III) halides show great application potential in opt‐electronic field owing to diverse topologies along with exceptional optical properties. We report herein an antimony(III) hybrid (MePPh3)2SbCl5 with a zero‐dimensional (0D) structure, which exhibits brilliant orange emission peaked at 593 nm with near‐unity photoluminescent quantum yield (99.4 %). The characterization of photophysical properties demonstrates that the broadband emission with a microsecond lifetime (3.24 μs) arises from self‐trapped emission (STE). Electrically driven organic light‐emitting diodes (OLEDs) based on neat and doped films of (MePPh3)2SbCl5 were fabricated. The doped devices show significant improvement in comparison to non‐doped OLEDs. Owing to the much improved surface morphology and balanced carrier transport in light‐emitting layers of doped devices, the peak luminance, current efficiency (CE) and external quantum efficiency (EQE) are boosted from 82 cd m−2 to 3500 cd m−2, 1.1 cd A−1 to 6.8 cd A−1, and 0.7 % to 3.1 % relative to non‐doped devices, respectively. [ABSTRACT FROM AUTHOR]

• Sb3+ doped In(III) metal halide with ultra-broad emission and enhanced PLQY. • A dual stimuli-responsive PL switch: short response times and high repeatability. • Multiple information encryption-decryption and anti-counterfeiting applications. • Printing fluorescent security labels with high spatial resolution and stability. While spatial-resolved luminescent anti-counterfeiting technology has reached maturity, achieving rapid responsiveness and exceptional fatigue resistance remains a challenge for high-security-level applications. Temperature-based multi-stimuli-responsive luminescent solid-state materials offer a promising solution to meet these requirements. In this study, we present a dual stimuli-responsive photoluminescence (PL) switching system that depends on both temperature and excitation wavelength, utilizing a Zero-Dimensional (0D) (PMA) 4 In 0.98 Sb 0.02 Cl 7 ·H 2 O (PMA = benzylamine). Notably, (PMA) 4 In 0.98 Sb 0.02 Cl 7 ·H 2 O exhibits orange broad-band emission at room temperature under both low-energy (365 nm) and high-energy (254 nm) irradiation. At 80 K, green light emission is observed under high-energy irradiation (254 nm), transforming into red emission when excited with low-energy wavelength (365 nm) at the same temperature. Moreover, the (PMA) 4 In 0.98 Sb 0.02 Cl 7 ·H 2 O both in powder and film states demonstrate excellent stimuli-responsive performance, including short response times and superior cyclic reversibility. Therefore, this 0D (PMA) 4 In 0.98 Sb 0.02 Cl 7 ·H 2 O can serve as a novel quarter-fold turn-on and tuning luminescent switch for encryption/decryption under the stimuli of temperature and excitation with rapid response and excellent fatigue resistance. [ABSTRACT FROM AUTHOR]

Zero-dimensional (0D) organic-inorganic hybrid materials have attracted extensive attention due to their facile preparation and excellent optical characteristics. However, achieving superior photophysical properties and excellent stability is still desirable for their practical application. Sb(III)-based metal halides owning 5 S2 lone-pair are prone to form deformable building units, which is beneficial for efficient self-trapped excitons (STE) emission. Herein, a 0D Sb(III)-based metal halides DIPA 2 SbCl 5 (DIPA+ = 4-amino-3,5-diiodopyridin-1-ium) was obtained by solvothermal method at room temperature, which exhibited highly efficient broadband emission at 652 nm with a photoluminescence quantum yield (PLQY) of 87.1% and outstanding stability against moisture. Then, a white-light-emitting diode (WLED) was fabricated by mixing DIPA 2 SbCl 5 with green phosphor ((Sr, Ba) 2 SiO 4 : Eu2+) and blue phosphor (BaMgAl 10 O 17 :Eu2+), with the CIE coordinates of (0.351, 0.371), a correlated color temperature of 4183 K and a color rendering index of 93.3. This work provides a universal solution to obtain hybrid materials with efficient luminescence properties and potential applications. • An orange-red emitting Sb3+-based 0D metal halide hybrid, which exhibits excellent luminescence with STE features. • A full-spectra WLED with a high CRI was fabricated by mixing the Sb(III) hybrids with commercial blue and green phosphors. • The fabricated WLED shows good operating stability under constant current density. [ABSTRACT FROM AUTHOR]