Nano-textured topography introduced at room temperature for light-trapping enhancement

作者：Hu, Qiang^*; Wang, Jian; Zhao, Yong; Li, Dejie

来源：Solar Energy Materials and Solar Cells, 2011, 95(11): 3065-3068.

DOI：10.1016/j.solmat.2011.06.035

• Light trapping
• Nano-textured topography
• Magnetron sputtering
• Thin-film solar cells

In this paper, a unique two-step method is developed to fabricate a nano-textured SnO2 coating. Nano-textured topography is successfully introduced at room temperature by evaporating Sn in a relatively high pressure. Nano-textured SnO2 coating is obtained by annealing in air, with lateral size of nearly 1 mu m and root-mean-roughness of over 140 nm. Two structures: substrate and superstrate, are investigated to reveal the light-trapping efficiency. With only 300 nm thick Si absorber layer, the average reflectivity under AM 1.5 illumination spectrum can be limited at 14% and 7%, respectively. This technology is suitable for mass production.

• 出版日期2011-11
• 单位清华大学