Photoelectrochemical and Physical Insight into Cu2ZnSnS4 Nanocrystals Using Synchrotron Radiation

作者：Vaccarello, Daniel; Liu, Lijia; Zhou, Jigang; Sham, Tsun-Kong; Ding, Zhifeng^*

来源：Journal of Physical Chemistry C, 2015, 119(21): 11922-11928.

DOI：10.1021/acs.jpcc.5b01049

• SOLAR-CELLS
• XANES SPECTROSCOPY
• PERFORMANCE
• BEAMLINE
• LAYERS
• PHASE

Cu2ZnSnS4 (CZTS) nanocrystals were synthesized via a one-pot method and photoelectrochemical measurements (PECMs) were used to quantitatively compare CZTS films. Based on their initial metal stoichiometry and photoresponse behavior, CZTS films were divided into groups of high-photoresponse (hp-CZTS) and low-photoresponse samples (lp-CZTS). An X-ray absorption near-edge structure (XANES) study was then performed to unravel the origin of the difference in their photovoltaic properties. The results demonstrated that the local structures of the elements and their interaction with capping ligands are different and strongly affect the photovoltaic behavior, although both CZTS groups through one-pot synthesis were free of secondary phases. It was determined that the coordination of Zn and the capping ligandmetal interaction are the two major factors for the production of higher photocurrent. The correlations will guide us to produce viable CZTS films crucial for the development of solar energy conversion.

• 出版日期2015-5-28
• 单位苏州大学; Canadian Light Source Inc; Canadian Light Source Inc.; Saskatoon