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优化宽带差距 Cu(In,Ga) Se2 太阳能电池性能:研究"悬崖"和""异构结构的影响
Shiqing Cheng1, Hongmei Liu1, Qiaowen Lin1
1College of Physics and Electronic Science, Shanxi Datong University, Datong 037009, China.
Materials (Basel, Switzerland)
|November 9, 2024
概括
"Spike"结构通过减少重组来改善宽间隙铜化 (CIGS) 太阳能电池的开放电路电压. 然而,它可以通过创建电子屏障来降低效率,这表明减少"悬崖"结构是最佳的.
科学领域:
- 材料科学 材料科学 材料科学
- 可再生能源可再生能源是可再生能源.
- 半导体物理 半导体物理
背景情况:
- 高效铜印化 (CIGS) 太阳能电池已经取得了显著的进步,特别是狭型,归因于CdS/CIGS异质连接处的"Spike"结构.
- 宽CIGS电池虽然适合模块化生产,但与窄同行相比,其效率较低.
- 假设在宽CIGS细胞的异质连接处的"悬崖"结构有助于降低它们的性能.
研究的目的:
- 通过使用数值模拟,分析"悬崖"和"尖端"异质连接结构对宽间隙CIGS太阳能电池性能的影响.
- 为了确定"Spike"结构是否可以提高宽CIGS太阳能电池效率.
主要方法:
- 使用SCAPS软件进行基于半导体物理和光伏效应的数值模拟.
- 调查了异质连接结构 ("悬崖"和"") 对设备参数的影响.
主要成果:
- 发现"Spike"结构可以减少界面重组,增强宽细胞的开放电路电压 (VOC).
- 电子传输屏障在与"Spike"结构的异质连接处形成,导致短路电流 (JSC) 和填充因子 (FF) 的减少,从而降低了整体效率.
- 在异质连接结构中减少"悬崖"度,有利于最大限度地减少界面重组,防止电子屏障的形成.
结论:
- 虽然"Spike"结构在宽CIGS电池中为VOC提供了好处,但由于潜在的效率损失,它并不普遍有利.
- 一个最佳的异质连接设计涉及将"悬崖"程度降至最低,以平衡减少重组和避免运输障碍.
- 优化异质连接结构对于提高VOC和宽CIGS太阳能电池的整体设备性能至关重要.
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