材料科学
光电流
硫系化合物
结晶度
拉曼光谱
带隙
锌黄锡矿
半导体
薄膜
分解水
旋涂
化学工程
光电子学
光学
光催化
纳米技术
复合材料
捷克先令
化学
物理
工程类
催化作用
生物化学
作者
M. Suresh Kumar,Sreejith P. Madhusudanan,Sudip K. Batabyal
标识
DOI:10.1016/j.matchar.2021.110988
摘要
Cu2BaSnS4 (CBTS) is a new class of chalcogenide semiconductors that are recently studied as a promising photoabsorber to address the cationic disorder experienced in kesterite Cu2ZnSn(SexS1-x)4 (CZTSSe) materials. The quaternary CBTS thin films were developed via a simple sol-gel method on soda-lime glass substrates by spin coating technique. The XRD analysis showed a pure trigonal structure of CBTS and that the crystallinity of films increases as the sulfurization time increases. The Raman analysis showed a dominant peak at the 342 cm−1 regardless of the sulfurization time and can be assigned to the symmetric "A" mode of the lattice vibrations confirming the formation of trigonal CBTS. The optical band gaps were found to be decreased as sulfurization time increases and the optimal band gap value was found for the samples annealed over 20 min at 540°C. The longer sulfurization time (60 min) resulted in declined crystalline quality with formation of secondary phases. The shorter sulfurization time is optimal for the growth of pure phase CBTS films. The developed CBTS films were studied and exhibited photocurrent density of 2.02 mA/cm2 was measured at −650 mV from the photoelectrochemical J-V characteristics confirming the material is suitable for the water splitting applications.
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