Interfacial Bridging Enables High Performance Perovskite Solar Cells with Fill Factor Over 85%

被引：5

作者：

Wang, Yanyan ^{[1
]}

Wang, Yaxin ^{[1
]}

Deng, Liangliang ^{[1
]}

Li, Xiaoguo ^{[1
]}

Zhang, Xin ^{[1
]}

Wang, Haoliang ^{[1
]}

Li, Chongyuan ^{[1
]}

Shi, Zejiao ^{[1
]}

Hu, Tianxiang ^{[1
]}

Liu, Kai ^{[1
]}

Barriguete, Jesus ^{[1
]}

Guo, Tonghui ^{[2
]}

Liu, Yiting ^{[3
]}

Zhang, Xiaolei ^{[3
]}

Hu, Ziyang ^{[4
]}

Zhang, Jia ^{[5
]}

Yu, Anran ^{[1
]}

Zhan, Yiqiang ^{[1
,5
]}

机构：

[1] Fudan Univ, Ctr Micronano Syst, Sch Informat Sci & Technol, Shanghai 200438, Peoples R China

[2] Wuhan Univ, Inst Technol Sci, Wuhan 430072, Peoples R China

[3] East China Normal Univ, State Key Lab Precis Spect, Shanghai 200241, Peoples R China

[4] Ningbo Univ, Sch Phys Sci & Technol, Dept Microelect Sci & Engn, Ningbo 315211, Peoples R China

[5] Fudan Univ, Inst Optoelect, State Key Lab Photovolta Sci & Technol, Shanghai 200438, Peoples R China

来源：

ADVANCED ENERGY MATERIALS | 2024年 / 14卷 / 41期

基金：

中国国家自然科学基金;

关键词：

buried interface; FF; graphene quantum dots; perovskite solar cells; EFFICIENT; SNO2; TRANSPORT; BANDGAP;

D O I：

10.1002/aenm.202402066

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The power conversion efficiency (PCE) of perovskite solar cells (PSCs) is approaching their Shockley-Queisser (S-Q) limit through numerous efforts in key parameters improvement. To further approaching the limit, it is important to facilitate the fill factor (FF), a parameter closely related to carrier transport and nonradiative recombination. Herein, an interfacial bridging strategy is proposed to improve FF, which utilizes functional graphene quantum dots at the tin oxide (SnO2)/perovskite buried interface. As a result, synergistic effects of enhanced conductivity of SnO2, preferable energy alignment at the buried interface and improved perovskite crystal orientation are realized. The champion FF reaches 85.24% in formamidinium lead iodide (FAPbI3) based PSCs, which ranks among the highest in the n-i-p structure. Such strategy is also proven successful in other perovskite systems, where the champion PCE reaches 24.86% in the formamidinium-cesium (FACs)-based devices and 24.44% in the flexible devices. Therefore, this work provides a practical design rule for pursuing high FF of PSCs with carbon materials. An facile interfacial bridging strategy by using functional graphene quantum dots to comprehensively solve SnO2/perovskite buried interface issues. The champion FF reaches 85.24% by synergistic effects of enhanced conductivity of SnO2, preferable energy alignment at the buried interface and improved perovskite crystal orientation. The champion PCE reaches 24.86% in the FACs-based devices and 24.44% in the flexible devices. image

引用

页数：12