Premium
Size‐Dependent Synthesis of Cu 12 Sb 4 S 13 Nanocrystals with Bandgap Tunability
Author(s) -
Chen Keqiang,
Zhou Jing,
Chen Wen,
Zhou Peng,
He Fan,
Liu Yueli
Publication year - 2015
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.201500088
Subject(s) - materials science , band gap , nanocrystal , absorption (acoustics) , optoelectronics , antimony , attenuation coefficient , quantum dot , nanotechnology , optics , physics , metallurgy , composite material
Copper antimony sulfide (CAS) is an attractive material with a suitable bandgap for sunlight absorption and a high absorption coefficient in solar cells. There are few works focused on the size‐controllable synthesis of CAS nanocrystals, and no work reports on the special character of bandgap tunability until now. Herein, high‐quality monodispersed tetrahedrite (Cu 12 Sb 4 S 13 ) nanocrystals are synthesized through a novel solution‐based method by using thiols as ligands. The as‐prepared Cu 12 Sb 4 S 13 nanocrystals have a narrow size distribution and wide size range from 2 to 16 nm, while their absorption band edges are continuously tunable from 620 to 780 nm. The quantum size effects with bandgap tunability of Cu 12 Sb 4 S 13 nanocrystals are observed for the first time.