Formation Mechanisms of Cu(In0.7Ga0.3)Se2 Nanocrystallites Synthesized Using Hot-Injection and Heating-Up Processes.

Autor: Wei-Hsiang Hsu, Hsing-I Hsiang, Yu-Lun Chang, Dah-Tong Ray, Fu-Su Yen
Předmět:
Zdroj: Journal of the American Ceramic Society; Sep2011, Vol. 94 Issue 9, p3030-3034, 5p, 1 Diagram, 3 Charts, 8 Graphs
Abstrakt: Nearly monodispersed CuIn0.7Ga0.3Se2 (CIGS) nanocrystals were successfully prepared using the thermal decomposition of copper, indium (In), gallium (Ga), and selenium-oleylamine (OLA) complexes via the heating-up process. The phase formation sequence was CuSe→CuInSe2→CIGS. The CIGS nanocrystals synthesized using the heating-up process exhibited a single chalcopyrite phase and its chemical composition was close to stoichiometric. However, phase separation of the In-rich and Ga-rich phases was found using the hot-injection method due to the difference in reactivity between In-OLA and Ga-OLA complexes. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index