Effective light trapping in thin film silicon solar cells from textured Al doped ZnO substrates with broad surface feature distributions
作者： Yanfeng Wang , Xiaodan Zhang , Lisha Bai , Qian Huang , Changchun Wei
DOI: 10.1063/1.4731775
关键词: Polymer solar cell 、 Silicon 、 Thin film 、 Photoconductivity 、 Materials science 、 Wide-bandgap semiconductor 、 Plasmonic solar cell 、 Etching (microfabrication) 、 Optoelectronics 、 Photocurrent
摘要: We used a multi-step process to make aluminum-doped ZnO (AZO) films with wide range distribution of textures for light trapping in thin film silicon solar cells, which includes AZO deposition, HCl etching, re-deposition, and re-etching. The large features created by the first etching provide an effective long wavelength light; small from second enhances short trapping. Microcrystalline cells deposited on above-mentioned show improved photocurrent density without loss open-circuit voltage fill factor, resulting overall increase efficiency 14.64%.
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