Engineering and Technology

27.09%-efficiency silicon heterojunction back contact solar cell and going beyond

G. Wang, Q. Su, et al.

Discover cutting-edge advancements in solar technology with this study on heterojunction back contact solar cells achieving a remarkable 27.09% efficiency through innovative laser patterning techniques. Authors Genshun Wang, Qiao Su, Hanbo Tang, Hua Wu, Hao Lin, Can Han, Tingting Wang, Chaowei Xue, Junxiong Lu, Liang Fang, Zhenguo Li, Xixiang Xu, and Pingqi Gao propose solutions to critical recombination losses and project even higher efficiencies on the horizon.

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Abstract

This study reports the fabrication of highly efficient heterojunction back contact (HBC) solar cells with a certified efficiency of 27.09% using a laser patterning technique. Recombination losses are primarily attributed to the hole-selective contact region and polarity boundaries. Solutions are proposed, and a relationship between contact resistivity, series resistance, and rear-side pattern design is established. Wafer edge recombination is identified as a significant current density loss channel. Further efficiency improvements up to 27.7% are projected with advanced passivation and optical enhancements.

Publisher

Nature Communications

Published On

Oct 16, 2024

Authors

Genshun Wang, Qiao Su, Hanbo Tang, Hua Wu, Hao Lin, Can Han, Tingting Wang, Chaowei Xue, Junxiong Lu, Liang Fang, Zhenguo Li, Xixiang Xu, Pingqi Gao

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