无机材料学报Issue(2)：141-147,7.DOI:10.15541/jim20150310
衬底温度对碲化镉薄膜性质及太阳电池性能的影响
Effect of Substrate Temperature on CdTe Thin Film Property and Solar Cell Performance
摘要
Abstract
Vapor transport deposition is an excellent method for preparing large area CdTe thin films with high quality and uniformity. Polycrystalline CdTe thin films were deposited by home-made vapor transport deposition system (VTD). The effects of substrate temperature on the property of CdTe film and the performance of CdTe solar cell were inves-tigated. CdTe thin films were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), UV-Vis spectrometer, and Hall Effect system. The results show that the CdTe thin films deposited by vapor transport deposi-tion are cubic phase with a preferred orientation in (111) direction. The average grain size increases from 2mm to 6mm and the carrier concentration increases from 1.93×1010 cm–3 to 2.36×1013 cm–3 when the substrate temperature increases from 520 ℃ to 620 ℃. This suggests that high substrate temperature can increase the carrier density significantly due to the suppressed defect recombination. The performance of CdTe thin film solar cells deposited at different sub-strate temperatures demonstrates that high substrate temperature (610℃) can greatly improve the efficiency, open cir-cuit voltage and fill factor of the solar cells. But the substrate temperature higher than 610℃ will reduce the spectral response of the cells in long wavelength region, which results in the degradation of solar cell performance. The small-area CdTe thin film solar cell without back contact layer deposited at substrate temperature of 610℃ obtains the best conversion efficiency of 11.2%.关键词
蒸汽输运法/CdTe薄膜/衬底温度/转换效率Key words
vapor transport deposition/CdTe thin film/substrate temperature/conversion efficiency分类
化学化工引用本文复制引用
曹胜,武莉莉,冯良桓,王文武,张静全,郁骁骑,李鑫鑫,李卫,黎兵..衬底温度对碲化镉薄膜性质及太阳电池性能的影响[J].无机材料学报,2016,(2):141-147,7.基金项目
国家高技术研究发展计划(2015AA050610) National High Technology Research and Development(2015AA050610) （2015AA050610）
