One-Step Formation of Low Work-Function, Transparent and Conductive MgFxOy Electron Extraction for Silicon Solar Cells

被引：29

作者：

Li, Junjun ^{[1
]}

Guo, Cong ^{[1
]}

Bai, Yu ^{[1
]}

Liu, Wenzhu ^{[2
]}

Chen, Yang ^{[1
]}

He, Jialong ^{[1
]}

Li, Dongdong ^{[3
]}

Yang, Xinbo ^{[4
]}

Qiu, Qingqing ^{[1
]}

Chen, Tao ^{[1
]}

Yu, Junsheng ^{[1
]}

Huang, Yuelong ^{[6
]}

Yu, Jian ^{[1
,5
,6
]}

机构：

[1] Southwest Petr Univ, Inst Photovolta, Chengdu 610500, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, Shanghai 201800, Peoples R China

[3] Chinese Acad Sci, Shanghai Adv Res Inst, Interdisciplinary Res Ctr, Shanghai 201210, Peoples R China

[4] Soochow Univ, Soochow Inst Energy & Mat InnovationS SIEMIS, Coll Energy, Suzhou 215006, Peoples R China

[5] Univ Elect Sci & Technol China UESTC, Sch Optoelect Informat, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China

[6] Southwest Petr Univ, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610500, Peoples R China

来源：

ADVANCED SCIENCE | 2022年 / 9卷 / 23期

基金：

中国国家自然科学基金;

关键词：

dopant-free solar cells; electron selective contact; high transmittance; LiFx; MgFxOy stack; low work function; HOLE-SELECTIVE CONTACTS; DOPANT-FREE; MAGNESIUM-OXIDE; HIGH-EFFICIENCY; PERFORMANCE; STABILITY; LAYER;

D O I：

10.1002/advs.202202400

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The development of high-performance dopant-free silicon solar cells is severely bottlenecked by opaque electron selective contact. In this paper, high transmittance (80.5% on glass) and low work function (2.92 eV) lithium fluoride (LiFx)/MgFxOy electron contact stack by tailoring the composition of MgFxOy hybrid film is reported. This hybrid structure exhibits a high conductivity (2978.4 S cm(-1)) and a low contact resistivity (2.0 m omega cm(2)). The element profile of LiFx/MgFxOy contact is measured and the reaction kinetics is analyzed. As a proof-of-concept, this electron selective contact is applied for dopant-free silicon solar cells. An impressive efficiency of 21.3% is achieved on dopant-free monofacial solar cell with molybdenum oxide (MoOx)/zinc-doped indium oxide (IZO) hole contact. An efficiency bifaciality of 71% is obtained for dopant-free bifacial solar cell with full-area LiFx/MgFxOy/ITO (tin-doped indium oxide) transparent electron contact. It is the highest efficiency bifaciality so far for dopant-free bifacial solar cells to the best knowledge. Both cell configurations with LiFx/MgFxOy contacts show excellent environment stability. The cell efficiency maintains more than 95% of its initial value after keeping in air for 1500 h. This work provides a new idea to achieve transparent electron contact, showing a great potential for high-efficiency and low-cost optoelectronic devices.

引用

页数：10

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