Investigation of the Ag-Si Contact Characteristics of Boron Emitters for n-Tunnel Oxide-Passivated Contact Solar Cells Metallized by Laser-Assisted Current Injection Treatment

被引：17

作者：

Fan, Yuan ^{[1
,2
]}

Zou, Shuai ^{[1
,2
,3
,4
]}

Zeng, Yulian ^{[1
,2
]}

Dai, Longfei ^{[1
,2
]}

Wang, Zipeng ^{[1
,2
]}

Lu, Zheng ^{[1
,2
]}

Sun, Hua ^{[1
,2
]}

Zhou, Xinshan ^{[4
]}

Liao, Baochen ^{[5
,6
]}

Su, Xiaodong ^{[1
,2
]}

机构：

[1] Soochow Univ, Sch Phys Sci & Technol, Suzhou 215006, Peoples R China

[2] Soochow Univ, Jiangsu Key Lab Thin Films, Suzhou 215006, Peoples R China

[3] Soochow Univ, Jiangsu Key Lab Adv Negat Carbon Technol, Suzhou 215123, Peoples R China

[4] Suzhou Isilver Mat Co Ltd, Suzhou 215129, Peoples R China

[5] Nantong Univ, Sch Microelect, Nantong 226019, Peoples R China

[6] Nantong Univ, Sch Integrated Circuits, Nantong 226019, Peoples R China

来源：

SOLAR RRL | 2024年 / 8卷 / 13期

基金：

中国国家自然科学基金;

关键词：

Ag-Si contacts; boron emitters; laser-enhanced contact optimization; metallizations; tunnel oxide-passivated contact solar cells; PV MODULES; SILICON;

D O I：

10.1002/solr.202400268

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：

Laser-assisted current injection treatment, also known as laser-enhanced contact optimization (LECO), has great potential to reduce front contact resistance and metal-induced recombination of n-type tunnel oxide-passivated contact (n-TOPCon) solar cells, thereby improving the cell efficiency. Herein, the interfacial Ag-Si contact characteristics on boron-doped p+ emitters and the electrical properties of industrial n-TOPCon solar cells that feature a LECO treatment and a specific Ag paste are investigated and compared with those of n-TOPCon solar cells with a standard Ag/Al paste process. LECO causes some current-fired contacts that, when removed by sequential selective etching, leave bowl-shaped imprints on the emitter, indicating that isotropic alloying behavior occurs between Ag and Si at these local positions during LECO. Unlike the standard Ag/Al metallization process, the LECO process does not significantly damage the passivation layer or emitter. More interestingly, the n-TOPCon solar cells prepared with the specific Ag paste do not initially form an effective metal-semiconductor contact, with an average efficiency of only 0.14%, which increases to 25.65% after LECO treatment, even 0.2%abs higher than that of the reference counterparts with standard Ag/Al electrodes. Ultimately, a physical model of LECO-induced Ag-Si contact formation on boron emitters is proposed. The interfacial Ag-Si contact characteristics on boron-doped p+ emitters and the electrical properties of industrial n-type tunnel oxide-passivated contact (n-TOPCon) solar cells that feature a laser-enhanced contact optimization (LECO) treatment and a specific Ag paste are investigated. Also, a physical model of LECO-induced Ag-Si contact formation on boron emitters is proposed.image (c) 2024 WILEY-VCH GmbH

引用

页数：11

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