Light-induced activation of boron doping in hydrogenated amorphous silicon for over 25% efficiency silicon solar cells

被引：90

作者：

Liu, Wenzhu ^{[1
]}

Shi, Jianhua ^{[1
,2
]}

Zhang, Liping ^{[1
,2
]}

Han, Anjun ^{[1
,2
]}

Huang, Shenglei ^{[1
]}

Li, Xiaodong ^{[1
]}

Peng, Jun ^{[3
]}

Yang, Yuhao ^{[1
]}

Gao, Yajun ^{[4
]}

Yu, Jian ^{[5
]}

Jiang, Kai ^{[1
]}

Yang, Xinbo ^{[6
]}

Li, Zhenfei ^{[1
]}

Zhao, Wenjie ^{[1
]}

Du, Junlin ^{[1
,2
]}

Song, Xin ^{[7
]}

Yin, Jun ^{[4
]}

Wang, Jie ^{[8
]}

Yu, Youlin ^{[1
]}

Shi, Qiang ^{[1
]}

Ma, Zhixin ^{[1
]}

Zhang, Haichuan ^{[2
,9
]}

Ling, Jiajia ^{[10
]}

Xu, Lujia ^{[4
]}

Kang, Jingxuan ^{[4
]}

Xu, Fuzong ^{[4
]}

Liu, Jiang ^{[4
]}

Liu, Hanyuan ^{[2
,9
]}

Xie, Yi ^{[2
,9
]}

Meng, Fanying ^{[1
,2
]}

De Wolf, Stefaan ^{[4
]}

Laquai, Frederic ^{[4
]}

Di, Zengfeng ^{[11
]}

Liu, Zhengxin ^{[1
,2
,9
]}

机构：

[1] Chinese Acad Sci, Res Ctr New Energy Technol, Shanghai Inst Microsyst & Informat Technol SIMIT, Shanghai, Peoples R China

[2] Zhongwei New Energy Chengdu Co, Chengdu, Sichuan, Peoples R China

[3] Australian Natl Univ, Sch Engn, Canberra, ACT, Australia

[4] King Abdullah Univ Sci & Technol KAUST, KAUST Solar Ctr KSC, Thuwal, Saudi Arabia

[5] Southwest Petr Univ, Inst Photovolta, Chengdu, Peoples R China

[6] Soochow Univ, Coll Energy, Soochow Inst Energy & Mat Innovat SIEMIS, Suzhou, Peoples R China

[7] Changzhou Univ, Jiangsu Collaborat Innovat Ctr Photovolta Sci & E, Sch Mat Sci & Engn, Changzhou, Peoples R China

[8] Cent South Univ, Coll Minerals Proc & Bioengn, Changsha, Peoples R China

[9] Tongwei Solar Co, Chengdu, Sichuan, Peoples R China

[10] UISEE Technol Shanghai Co, Shanghai, Peoples R China

[11] Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, State Key Lab Funct Mat Informat, Shanghai, Peoples R China

来源：

NATURE ENERGY | 2022年 / 7卷 / 05期

关键词：

RELAXATION; DIFFUSION; SOAKING;

D O I：

10.1038/s41560-022-01018-5

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Recent achievements in amorphous/crystalline silicon heterojunction (SHJ) solar cells and perovskite/SHJ tandem solar cells place hydrogenated amorphous silicon (a-Si:H) at the forefront of photovoltaics. Due to the extremely low effective doping efficiency of trivalent boron in amorphous tetravalent silicon, light harvesting of aforementioned devices is limited by their fill factors (FFs), a direct metric of the charge carrier transport. It is challenging but crucial to develop highly conductive doped a-Si:H with minimal FF losses. Here we report that light soaking can efficiently boost the dark conductance of boron-doped a-Si:H thin films. Light induces diffusion and hopping of weakly bound hydrogen atoms, which activates boron doping. The effect is reversible and the dark conductivity decreases over time when the solar cell is no longer illuminated. By implementing this effect to SHJ solar cells, we achieved a certified total-area power conversion efficiency of 25.18% with a FF of 85.42% on a 244.63 cm(2) wafer.

引用

页码：427 / 437

页数：11

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