CdTe solar cell performance under low-intensity light irradiance

CdTe solar cell performance under low-intensity light irradiance
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CdTe太阳能电池在低强度光辐照度下的性能

DOI:
10.1016/j.solmat.2015.09.043
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发表时间:
2014-04
影响因子:
6.9
通讯作者:
Wang, Deliang
Wang, Deliang
中科院分区:
材料科学2区
文献类型:
--
作者:
Yang, Ruilong;Deng, Yi;Jeng, Ming-Jer;Wang, Deliang

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研究CdTe太阳电池在弱光照射(Eirra)下的器件特性对于理解基本器件物理和商业应用都是重要的,室外太阳电池组件经常遇到强度远小于1个太阳的辐射。在本研究中,我们研究了镉镉太阳电池在0.015微米太阳辐射下的性能。在低Eirra时,并联电阻对填充因数(Ff)和开路电压(VOC)都有很大影响。电流分流严重依赖于分流路径在CdTe吸收体层中的物理位置。空间电荷限制电流(SCLC)是影响薄膜镉太阳电池分流电流的重要因素。在低至0.015太阳辐射下,具有高分流电阻的镉镉太阳电池的效率保持在标准AM1.5Eirra测试值的~70%至80%。实验结果表明,多晶CdTe薄膜太阳电池是一种较好的低阻抗光伏发电装置。这项研究为今后的镉镉太阳电池的设计和制造提供了建设性的指导。
Study of the device characteristics of a CdTe solar cell under weak light irradiance (Eirra) is important both for the understanding of the fundamental device physics and for the commercial application, whereEirrawith intensity much less than one sun is often encountered for an outdoor solar cell module. In this study, CdTe solar cell performance underEirraas low as 0.015 sun was studied. Both the fill factor (FF) and the open-circuit voltage (Voc) were found to be critically affected by the shunt resistance at lowEirra. The current shunting depends critically on the physical location of the shunting paths in the CdTe absorber layer. Space-charge limited current (SCLC) was identified to be an important contribution to the shunting current in thin film CdTe solar cell. At anEirraas low as 0.015 Sun, CdTe solar cell with a high shunt resistance maintained an efficiency of ~70 to 80% of the value tested at the standard AM1.5Eirra. The experimental results showed that polycrystalline CdTe thin film solar cell is a good photovoltaic device for electric power generation at lowEirra. This study provides constructive guidelines for the future design and fabrication of CdTe solar cells.
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