Wet-etch texturing of ZnO:Ga back layer on superstrate-type microcrystalline silicon solar cells

Kuang Chieh Lai, Fu Ji Tsai, Jen Hung Wang, Chih Hung Yeh, Mau Phon Houng

研究成果: Review article

4 引文 斯高帕斯(Scopus)

摘要

Surface wet etching is applied to the ZnO:Ga (GZO) back contact in μc-Si thin film solar cells. GZO transparency increases with increasing deposition substrate temperature. Texturing enhances reflective scattering, with etching around 56 s producing the best scattering, whereas etching around 5 s produces the best fabricated solar cells. Etching beyond these times produces suboptimal performance related to excessive erosion of the GZO. The best μc-Si solar cell achieves FF=68%, VOC=471 mV and JSC=21.48 mA/cm 2 (η=6.88%). Improvement is attributed to enhanced texture-induced scattering of light reflected back into the solar cell, increasing the efficiency of our lab-made single μc-Si solar cells from 6.54% to 6.88%. Improved external quantum efficiency is seen primarily in the longer wavelengths, i.e. 6001100 nm. However, variation of the fabrication conditions offers opportunity for significant tuning of the optical absorption spectrum.

原文English
頁(從 - 到)1583-1586
頁數4
期刊Solar Energy Materials and Solar Cells
95
發行號7
DOIs
出版狀態Published - 2011 七月 1

    指紋

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films

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