Acta Optica Sinica, Volume. 35, Issue 2, 216001(2015)
Optimization of Light Trapping Structure on Textured Silicon Substrate for Heterojunction Solar Cells
Silicon heterojunction (SHJ) solar cells as a new high efficient solar cell have been paid much more attention in the past years is prepared by hydrogenated amorphous silicon films deposited on crystalline silicon. The textured structure in high efficiency heterojunction solar cells reduces the reflection and improves the light trapping. As a result, there is a subsequent higher short circuit current density in the solar cells. Wet chemical etching process is used to obtain texture on monocrystalline silicon substrate. Several key parameters which influence texturing processes, including concentration of isopropyl alcohol, etching time, substrate type and the content of sodium silicate, are selected to optimize and achieve the low reflection on silicon substrate. After that, the reflectance reduces from 34.7% to 9.14% (1011 nm) and the short circuit current density enhances from 32.06 mA/cm- 2 to 36.16 mA/cm- 2. The textured substrate can effectively improve the performance of SHJ solar cells.
Get Citation
Copy Citation Text
Wang Liguo, Zhao Zhenyue, Zhang Xiaodan, Wang Fengyou, Jiang Yuanjian, Du Jian, Zhao Ying, Liu Caichi, Wei Changchun, Xu Shengzhi, Hao Qiuyan. Optimization of Light Trapping Structure on Textured Silicon Substrate for Heterojunction Solar Cells[J]. Acta Optica Sinica, 2015, 35(2): 216001
Category: Materials
Received: Jul. 28, 2014
Accepted: --
Published Online: Jan. 19, 2015
The Author Email: Liguo Wang (xixiguniang@hotmail.com)