Title :
Colloidal synthesis of wurtzite Cu2FeSnS4 nanocrystals
Author :
Zhang, Xiaoyan ; Bao, Ningzhong ; Ramasamy, Karthik ; Lin, Baoping ; Gupta, Arunava
Author_Institution :
Dept. of Chem., Univ. of Abalama, Tuscaloosa, AL, USA
Abstract :
Quaternary Cu2FeSnS4 (CFTS) nanocrystals exhibiting a new wurtzite phase have been synthesized using a solution-based method. The optimum temperature to obtain phase-pure wurtzite CFTS is ~210°C. As the reaction temperature is increased from 210°C to 310°C, a mixture of wurtzite and zinc blende CFTS is obtained. The morphology of the as-synthesized wurtzite CFTS is oblate spheroids with an average size of 20nm. The corresponding band gaps of CFTS nanocrystals synthesized at different temperatures varies between 1.54 eV-1.49 eV. Based on the results, CFTS with optimal band gap, low-toxicity composition and earth-abundant elements appears attractive as a low-cost substitute for use in thin film solar cells.
Keywords :
colloids; copper compounds; iron compounds; nanostructured materials; solar cells; tin compounds; Cu2FeSnS4; colloidal synthesis; earth-abundant elements; electron volt energy 1.54 eV to 1.49 eV; optimal band gap; phase-pure wurtzite; quaternary nanocrystals; reaction temperature; size 20 nm; solution-based method; temperature 210 C to 310 C; thin film solar cells; wurtzite nanocrystals; wurtzite phase; zinc blende; Absorption; Crystals; Nanocrystals; Photonic band gap; Photovoltaic cells; X-ray scattering; Zinc; Cu2FeSnS4; Nanocrystals; optical property; wurtzite structure;
Conference_Titel :
Photovoltaic Specialists Conference (PVSC), 2012 38th IEEE
Conference_Location :
Austin, TX
Print_ISBN :
978-1-4673-0064-3
DOI :
10.1109/PVSC.2012.6317981
