Details

Autor(en) / Beteiligte

• Chiang, Ming-Yi
• Chang, Shu-Hao
• Chen, Chia-Yu
• Yuan, Fang-Wei
• Tuan, Hsing-Yu

Titel

Quaternary CuIn(S1−x Se x )2 Nanocrystals: Facile Heating-Up Synthesis, Band Gap Tuning, and Gram-Scale Production

Ist Teil von

• Journal of physical chemistry. C, 2011-02, Vol.115 (5), p.1592-1599

Ort / Verlag

American Chemical Society

Erscheinungsjahr

2011

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Tetragonal chalcopyrite CuIn-(S1−x Se x )2 (0 ≤ x ≤ 1) nanocrystals were synthesized by reacting a mixture of CuCl, InCl3, S, and Se in the presence of oleylamine at 265 °C. The S/Se composition ratio in the CuIn(S1−x Se x )2 could be tuned across the entire composition range of x from 0 to 1 by modulating the S/Se reactant mole ratio. The tetragonal lattice constants, that is, a and c, increase linearly with the increase of Se content, following Vegard’s law. The band gap energies of CuIn(S1−x Se x )2 nanocrystals could be tuned in the range between 0.98 and 1.46 eV and change nonlinearly with respect to x, deriving a bowing parameter of 0.17 eV. In addition, the method developed in this study was scalable to achieve gram-scale production of stoichiometry-controlled CuIn(S1−x Se x )2 and CuIn1−x Ga x Se2 nanocrystals.