Hole-selective-molecule doping improves the layer thickness tolerance of PEDOT:PSS for efficient organic solar cells

被引：9

作者：

Zhao, Bin ^{[1
]}

Huang, Xiaozhen ^{[2
,3
]}

Chung, Sein ^{[4
]}

Zhang, Min ^{[5
]}

Zhong, Yufei ^{[7
]}

Liang, Anhai ^{[1
]}

Zhao, Zhenmin ^{[1
]}

Zhu, Chaofeng ^{[1
]}

Zhao, Jingjing ^{[1
]}

Kim, Seunghyun ^{[4
]}

Kim, Jimin ^{[4
]}

Wang, Ming ^{[1
]}

Chen, Shilin ^{[1
]}

Cho, Kilwon ^{[4
]}

Wang, Yang ^{[2
,3
]}

Kan, Zhipeng ^{[1
,6
]}

机构：

[1] Guangxi Univ, Carbon Peak & Neutral Sci & Technol Dev Inst, Ctr Nanoenergy Res, Sch Phys Sci & Technol, Nanning 530004, Peoples R China

[2] Fujian Normal Univ, Strait Inst Flexible Elect SIFE, Fujian Key Lab Flexible Elect, Future Technol, Fuzhou 350117, Fujian, Peoples R China

[3] Strait Lab Flexible Elect SLoFE, Fuzhou 350117, Fujian, Peoples R China

[4] Pohang Univ Sci & Technol, Dept Chem Engn, 77 Cheongam Ro, Pohang Si 37673, South Korea

[5] Huaibei Normal Univ, Sch Phys & Elect Informat, Anhui Prov Key Lab Pollutant Sensit Mat & Environm, Huaibei 235000, Peoples R China

[6] Guangxi Univ, State Key Lab Featured Met Mat & Life cycle Safety, Nanning 530004, Peoples R China

[7] Ningbo Tech Univ, Sch Mat Sci & Engn, Ningbo 315100, Peoples R China

来源：

ESCIENCE | 2025年 / 5卷 / 01期

基金：

新加坡国家研究基金会; 中国国家自然科学基金;

关键词：

PEDOT:PSS; Thickness tolerance; Hole extraction; INJECTION; ENABLES;

D O I：

10.1016/j.esci.2024.100305

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

When used in organic solar cells, poly (3,4-ethylenedioxythiophene)-poly (styrenesulfonate) (PEDOT:PSS) aligns interfacial energy levels, promotes hole extraction, blocks electrons, and optimizes the active layer's morphology. However, with an optimal thickness of approximately 30-40 nm, PEDOT:PSS has insufficient layer thickness tolerance, owing to its low conductivity and hole extraction property. Herein, a hole-selective-molecule doping strategy is proposed to enhance the properties of PEDOT:PSS by introducing MPA2FPh-BT-BA (abbreviated as 2F) into its layer. 2F assembles at the anode to form interfacial dipoles due to its unique donor-acceptor-anchor molecular configuration, altering the anode work function and hole-selective extraction. Additionally, 2F improves the aggregation properties of PEDOT:PSS by forming hydrogen bonds with the PSS group, enhancing the conductivity characteristics. These changes in the PEDOT:PSS layer further influence the overlaying morphology, leading to increased crystalline features of PM6 and the bulk heterojunction of PM6:Y6. When a 2F-PEDOT:PSS (2FPP) layer is used, power conversion efficiencies of 18.3%, 19.2%, and 19.1% are achieved in PM6:Y6, PM6:BTP-eC9, and PM6:L8-BO devices, respectively, outperforming counterparts with PEDOT:PSS. Specifically, the performance of PM6:Y6 devices with a 2FPP layer of 170 nm remains at > 15%, providing valuable guidance for designing a thickness-insensitive hole transport layer for high-efficiency organic solar cells.

引用

页数：9

共 56 条

[1] Graphene for Thermoelectric Applications: Prospects and Challenges [J].