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CdTe薄膜半导体电极通过电沉积法制备。电沉积溶液组成对CdTe薄膜组成和性能有较大影响,通过在电镀液中添加某些稀土离子,结合XRD、TEM、XPS和光电I-V特性曲线进行分析研究,表明电沉积CdTe薄膜存在择优取向,经250℃热处理后,晶粒长大,镀液中添加Y3+、La3+、Ce3+和Nd3+后增大尤为明显,晶粒线性尺寸最大达2.5—3.0×10-7m左右,并伴有孪晶产生,可提高薄膜Cd/Te比等,有利于提高CdTe光电性能。经测试,其光电转换效率可增大到2.6—3.3%。
CdTe thin film semiconductor electrodes are prepared by electrodeposition. The composition of electrodeposition solution has a significant influence on the composition and properties of CdTe thin films. The addition of some rare earth ions in the plating solution, combined with the XRD, TEM, XPS and photoelectric I-V characteristic curve analysis showed that CdTe thin film electrodeposited preferred Orientation, after heat treatment at 250 ℃, the grains grow up, the addition of Y3 +, La3 +, Ce3 + and Nd3 + in the bath increases more obviously. The maximum linear grain size reaches about 2.5-3.0 × 10-7m Accompanied by twins, can improve the film Cd / Te ratio, etc., is conducive to improving the photoelectric properties of CdTe. After testing, the photoelectric conversion efficiency can be increased to 2.6-3.3%.