Dithieno[3,2-a:2?,3?-c]phenazine based hole-transporting materials for efficient perovskite solar cells: Effects of donors numbers

被引：8

作者：

Wang, Zhihui ^{[1
]}

Xu, Chunchen ^{[1
]}

Yang, Zongyuan ^{[1
]}

Zou, Yujie ^{[1
]}

Zhang, Kailong ^{[1
]}

Gao, Ping ^{[1
,4
,5
]}

Xu, Weichuan ^{[1
]}

Li, Gongqiang ^{[2
]}

Chen, Jing ^{[1
]}

Liang, Mao ^{[3
]}

机构：

[1] Huaiyin Inst Technol, Natl & Local Joint Engn Res Ctr Deep Utilizat Tech, Key Lab Palygorskite Sci & Appl Technol Jiangsu Pr, Huaian 223003, Peoples R China

[2] Nanjing Tech Univ NanjingTech, Inst Adv Mat IAM, 30 South Puzhu Rd, Nanjing 211816, Peoples R China

[3] Tianjin Univ Technol, Dept Appl Chem, Tianjin Key Lab Organ Solar Cells & Photochem Conv, Tianjin 300384, Peoples R China

[4] Nanjing Tech Univ NJ Tech, Key Lab Flexible Elect KLOFE, 5 Xinmofan Rd, Nanjing 210009, Peoples R China

[5] Nanjing Tech Univ NJ Tech, Inst Adv Mat IAM, 5 Xinmofan Rd, Nanjing 210009, Peoples R China

来源：

DYES AND PIGMENTS | 2023年 / 211卷

基金：

中国国家自然科学基金;

关键词：

Perovskite solar cells; Hole-transporting materials; Dithieno[3; 2-a; 2; 3? -c]phenazine; Donors numbers; Photovoltaic performance; LOW-COST; HIGHLY EFFICIENT; CORE;

D O I：

10.1016/j.dyepig.2022.111066

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Incorporation of electron-deficient polycyclic aromatics into molecular skeleton has been proved to be an effective strategy for improving the device performance of organic photovoltaics. In this context, three low-cost hole-transporting materials (HTMs) endowed with dithieno[3,2-a:2 ',3 '-c]phenazine core were successfully syn-thesized and employed for perovskite solar cells (PSCs). A comparative evaluation in relation to the numbers of peripheral donors was systematically investigated by measurement of their photophysical, electrochemical and photovoltaic performance. It is revealed that the low-symmetrical WH04 featuring three triphenylamine (TPA) donors exhibited a deeper HOMO level, a higher hole-transporting capacity and smoother film morphology than the molecules with two or four terminal donors. As a result, the WH04-based PSCs realized the highest power conversion efficiency of 20.52%, accompanied with excellent long-term device stability, which is competitive with spiro-OMeTAD based devices. We believe that molecular engineering of donors numbers is envisioned as an effective strategy for constructing highly efficient D-A-D type HTMs for PSCs.

引用

页数：9

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