1. Cu2ZnSn(S,Se)4 Photovoltaics
CuInSe2
(I-III-VI)
Cu2ZnSn(S,Se)4 (CZTS)
(I-II-IV-VI)
Suitable and tunable bandgap
Large absorption coefficient
Proven efficiency (12.7%) through non-vacuum fabrication
Only earth-abundant elements
Kim, J. et al. Adv. Mater. 2014, DOI: /adma

2. Solution-Processed Cu2ZnSn(S,Se)4 at UCLA
Understanding Chemistry
Hsu, W.-C. et al. Energy Environ. Sci. 2012, 5, 8564.
Yang, W. et al. J. Am. Chem. Soc. 2013, 135, 6915.
Developing Formulation
Zhou, H. et al. Energy Environ. Sci. 2014, 7, 998.
Hsu, C.-J. et al. Adv. Energy Mater. 2014, 4,
Fabricating Solar Cells
Yang, W. et al. Adv. Mater. 2012,24, 6323.
Hsu, W.-C. et al. ACS Nano 2014, 8, 9164.
Studying Device Physics
Duan, H.-S. et al. Adv. Funct. Mater. 2013, 23, 1466.
Zhou, H. et al. J. Am. Chem. Soc. 2013, 135,