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Formation Mechanisms of Cu(In 0.7 Ga 0.3 )Se 2 Nanocrystallites Synthesized Using Hot‐Injection and Heating‐Up Processes
Author(s) -
Hsu WeiHsiang,
Hsiang HsingI,
Chang YuLun,
Ray DahTong,
Yen FuSu
Publication year - 2011
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2011.04488.x
Subject(s) - copper indium gallium selenide solar cells , chalcopyrite , oleylamine , indium , gallium , materials science , stoichiometry , nanocrystal , thermal decomposition , copper , phase (matter) , chemical engineering , selenium , metallurgy , nanotechnology , thin film , chemistry , organic chemistry , engineering
Nearly monodispersed CuIn 0.7 Ga 0.3 Se 2 (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→CuInSe 2 →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.