SpringerOpen Newsletter

Receive periodic news and updates relating to SpringerOpen.

Open Access Open Badges Nano Express

Efficiency improvement of silicon solar cells enabled by ZnO nanowhisker array coating

Xuegong Yu, Dong Wang, Dong Lei, Genhu Li and Deren Yang*

Author affiliations

State Key Laboratory of Silicon Materials, Department of Materials Science & Engineering, Zhejiang University, Hangzhou, Zhejiang Province, 310027, Peoples Republic of China

For all author emails, please log on.

Citation and License

Nanoscale Research Letters 2012, 7:306  doi:10.1186/1556-276X-7-306

Published: 15 June 2012


An efficient antireflection coating is critical for the improvement of silicon solar cell performance via increased light coupling. Here, we have grown well-aligned ZnO nanowhisker (NW) arrays on Czochralski silicon solar cells by a seeding-growth two-step process. It is found that the ZnO NWs have a great effect on the macroscopic antireflection effect and, therefore, improves the solar cell performance. The ZnO NW array-coated solar cells display a broadband reflection suppression from 500 to 1,100 nm, and the minimum reflectance smaller than 3% can easily be achieved. By optimizing the time of ZnO NW growth, it has been confirmed that an increase of 3% relatively in the solar cell efficiency can be obtained. These results are quite interesting for the application of ZnO nanostructure in the fabrication of high-efficiency silicon solar cells.

Silicon; Solar cell; Antireflection; ZnO nanowhisker; Efficiency.