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在CdS/CdTe光伏设备性能上CdTe接口结构的作用

Niva K Jayswal¹, Dipendra Adhikari¹, Indra Subedi¹

¹Department of Physics and Astronomy, Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo, Toledo, OH 43606, USA.

Materials (Basel, Switzerland)

|October 28, 2023

概括

化 (CdTe) 间层的视角沉积提高了太阳能电池的效率. 在CdS/CdTe连接处的六角CdTe中间层减少了格子不匹配,提高了光伏设备的性能.

科学领域:

材料科学材料科学材料科学
固态物理固态物理
太阳能光伏发电是如何实现的

背景情况:

Telluride (CdTe) 太阳能电池是一个关键的光伏技术.
对于设备性能来说,CdS/CdTe异质连接非常重要.
控制界面上的晶体结构对于优化太阳能电池至关重要.

研究的目的:

为了研究视角沉积 (GLAD) CdTe间层在定制CdS/CdTe异质连接中的作用.
通过控制接口属性来优化光伏 (PV) 设备的性能.
评估GLAD CdTe介层厚度和沉积条件对太阳能电池效率的影响.

主要方法:

在各种斜沉积角度 (Φ) 和温度 (室温[RT]和250°C[HT]) 准备GLAD CdTe薄膜.
使用GLAD CdTe作为中间层制造CdS/CdTe异质连接.
GLAD CdTe薄膜的晶体结构 (立方,六角,混合) 的表征.
评估光伏设备的性能,包括开放电路电压和填充因子.

主要成果:

根据沉积角度和温度,GLAD CdTe膜表现出不同的晶体结构 (立方,六角,混合).
A Φ = 80° RT GLAD CdTe中间层,具有六角结构,与六角CdS层对齐,减少格子不匹配.
厚度为250纳米的太阳能电池 Φ = 80° RT GLAD CdTe介层显示出显著的改善:开通电路电压和填充因子产物增加0.53V,与基线设备相比,绝对效率增加0.73%.

结论:

通过控制晶体结构和减少晶格不匹配,GLAD CdTe中间层可以有效地定制CdS/CdTe异质连接.
优化的GLAD CdTe中间层,特别是六角层,显著提高了光伏设备的性能.
这种接口工程方法为提高CdTe太阳能电池效率提供了一个有希望的途径.

关键词:

在 GLAD CdTe 中间层.俯角度沉积 (GLAD) 的情况接口量身定制接口量身定制薄膜太阳能电池薄膜太阳能电池

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