Synthesis of Cu2SnSe3 nanocrystals for solution processable photovoltaic cells.
This paper describes the synthesis of ternary chalcogenide Cu(2)SnSe(3) nanocrystals as an alternative solar absorber material to conventional quaternary CuIn(x)Ga(1-x)Se(2). We used the hot coordination solvent method with hexadecylamine as the capping ligand for the first time for this material system. Using a variety of characterization techniques, such as X-ray diffraction, selected area electron diffraction, convergent beam electron diffraction, and Raman spectroscopy, the nanocrystals were found to be monoclinic Cu(2)SnSe(3) with an optical energy band gap of 1.3 eV and have a narrow size distribution. These nanocrystals are shown to be photosensitive in the range of wavelengths corresponding to the solar spectrum, which makes them highly promising as alternative photon absorber materials for photovoltaic applications.
School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore.
Mahshid
M
Ahmadi
Stevin S
SS
Pramana
Sudip K
SK
Batabyal
Chris
C
Boothroyd
Subodh G
SG
Mhaisalkar
Yeng Ming
YM
Lam