Highly reproducible self-assembled monolayer based perovskite solar cells via amphiphilic polyelectrolyte

被引:6
|
作者
Liu, Shi-Chun [1 ]
Lin, Heng-Yi [1 ]
Hsu, Shih-En [1 ]
Wu, Dong-Tai [1 ]
Sathasivam, Sanjayan [2 ]
Daboczi, Matyas [3 ,4 ]
Hsieh, Hsing-Jung [1 ]
Zeng, Chin-Sian [1 ]
Hsu, Ting-Ge [1 ]
Eslava, Salvador [3 ,4 ]
Macdonald, Thomas J. [5 ]
Lin, Chieh-Ting [1 ,6 ]
机构
[1] Natl Chung Hsing Univ, Dept Chem Engn, 145 Xingda Rd, Taichung 40227, Taiwan
[2] London South Bank Univ, Sch Engn, London SE1 0AA, England
[3] Imperial Coll London, Dept Chem Engn, London SW7 2AZ, England
[4] Imperial Coll London, Ctr Processable Elect, London SW7 2AZ, England
[5] Queen Mary Univ London, Sch Engn & Mat Sci, London E1 4NS, England
[6] Natl Chung Hsing Univ, Innovat & Dev Ctr Sustainable Agr, Taichung 402, Taiwan
基金
英国工程与自然科学研究理事会;
关键词
PERFORMANCE;
D O I
10.1039/d3ta04512a
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
Self-assembled monolayers (SAM) have attracted a lot of attention in perovskite solar cells (PSCs) due to their high efficiency in both single junction and tandem devices. However, inferior reproducibility originating from poor surface coverage and voids in the perovskite layer at the buried interface still limits their widespread use. Herein, we report a facile method to significantly improve the reproducibility of PSCs by employing an amphiphilic conjugated polyelectrolyte between SAMs and perovskite layers. Application of the polyelectrolyte leads to a 200 meV shallower perovskite Fermi level, allowing a desirable, significantly increased band bending at the SAM/perovskite interface. Moreover, imaging the buried perovskite interface by a novel technique reveals that interfacial voids are minimised by the polyelectrolyte leading to complete coverage of the ITO/SAM surface. As a result, remarkable fill factors over 0.84 and power conversion efficiencies exceeding 22.5% are achieved. The PSCs demonstrate exceptional reproducibility and high performance, as evidenced by an average fill factor of 0.81 with a remarkably low standard deviation of less than 0.01 across 50 individual devices. These results demonstrate a universal method to improve the reproducibility of PSCs containing commonly used SAMs and open the door for wider use of amphiphilic conjugated polyelectrolytes in optoelectronic devices.
引用
收藏
页码:2856 / 2866
页数:11
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