Ultrafast Random‐Pyramid Texturing for Efficient Monocrystalline Silicon Solar Cells. Issue 7 (28th March 2022)

• Record Type: Journal Article
• Authors: Zhu, Lei; Zou, Shuai; Ni, Mengfei; Ding, Jianming; Wu, Chengkun; Lu, Zheng; Zeng, Yulian; Ye, Xiaoya; Wang, Xusheng; Fan, Ronglei; Sun, Hua; Liao, Baochen; Xu, Yadong; Shen, Mingrong; Su, Xiaodong
• Is Part Of: Solar RRL. Volume 6:Issue 7(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-03-28
• Subjects: metal-catalyzed chemical etching -- monocrystalline silicon wafers -- PERC solar cells -- pyramid structure -- ultrafast texturing; Solar energy -- Periodicals; Photovoltaic power generation -- Periodicals; Solar energy -- Research -- Periodicals; Photovoltaic power generation -- Research -- Periodicals; Periodicals; 333.7923
• DOI: 10.1002/solr.202200204
• Languages: English
• ISSNs: 2367-198X

Abstract

Abstract : Herein, an ultrafast random‐pyramid texturing process is proposed for monocrystalline silicon (mono‐Si) solar cells by combining metal‐catalyzed chemical etching (MCCE) and the standard alkaline texturing process. Namely, large numbers of artificial defects are introduced on the wafer surface in 3 min by MCCE; therefore, the process duration of alkaline texturing is largely shortened from 420 s for the as‐cut wafer to 180 s for the wafer with artificial defects due to its high surface reactivity. Moreover, those tiny artificial defects are apt to form small pyramids, resulting in a better light‐trapping performance. As a demonstration, the passivated emitter rear contact solar cell with ultrafast random pyramid texture achieves a power conversion efficiency of 23.02%. Therefore, such a cost‐effective ultrafast texturing strategy can open a promising new route toward the mass production of high‐efficiency industrial mono‐Si solar cells. Abstract : Herein, a way to realize 180 s of ultrafast texturing for mono‐Si wafers is proposed by combining well‐established metal‐catalyzed chemical etching and a standard alkaline texturing process. Consequently, mono‐Si passivated emitter rear contact solar cells with pyramid texture fabricated via the proposed texturing process are prepared to show an average η of 22.88% and a highest η of 23.02%.