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Thermal behaviour of precursors for CuInS2 thin films deposited by spray pyrolysis
- Source :
- Journal of Thermal Analysis and Calorimetry. 113:1455-1465
- Publication Year :
- 2013
- Publisher :
- Springer Science and Business Media LLC, 2013.
-
Abstract
- The thermal decomposition of precursors for copper indium disulphide (CuInS2) thin films obtained by drying aqueous solutions of copper chloride (CuCl2), indium chloride (InCl3) and thiourea (SC(NH2)2) at the Cu:In:S molar ratios of 1:1:3 (1) and 1:1:6 (2) was monitored by simultaneous thermogravimetry /differential thermal analysis/ evolved gas analysis-mass spectrometry (TG/DTA/EGA-MS) measurements in a dynamic 80 %Ar + 20 %O2 atmosphere. X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy were used to characterise the dried precursors and products of the thermal decomposition. The precursors 1 and 2 are mixtures of copper and indium chloride thiourea complex compounds, whilst 1 can also contain unreacted InCl3. The thermal degradation of 1 and 2 in the temperature range of 30–800 °C consists of six steps with a total mass loss of 71.5 and 89.8 %, respectively. According to XRD, CuInS2 is formed below 300 °C. Decomposition of 1 and 2 is completed at 620 and 600 °C, respectively. The final decomposition product of 1 at 800 °C consists of a mixture of In2O3 and CuO phases, whilst 2 consists of In2O3, CuO and Cu2In2O5 phases. EGA by MS revealed the release of CS2, NH3, H2NCN and HNCS, which upon their oxidation also yield COS, SO2, HCN and CO2.
- Subjects :
- Thermal decomposition
Analytical chemistry
chemistry.chemical_element
Condensed Matter Physics
Copper
Thermogravimetry
chemistry.chemical_compound
chemistry
Thiourea
Differential thermal analysis
Physical and Theoretical Chemistry
Copper chloride
Fourier transform infrared spectroscopy
Indium
Subjects
Details
- ISSN :
- 15728943 and 13886150
- Volume :
- 113
- Database :
- OpenAIRE
- Journal :
- Journal of Thermal Analysis and Calorimetry
- Accession number :
- edsair.doi...........77aab6c01464635c6ce18fc240d179fe