Journal
ACS APPLIED ENERGY MATERIALS
Volume 5, Issue 5, Pages 5901-5908Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.2c00223
Keywords
fluorine substitutions; dopant-free; low-cost; hole-transporting materials; inverted perovskite solar cells
Funding
- National Natural Science Foundation of China [21905119, 22179053]
- Key Research and Development program of Jiangsu Province [BE2019009-3]
- Six-peak top talents in Jiangsu province [XNY066]
- High-tech Research Key laboratory of Zhenjiang [SS2018002]
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In this study, dopant-free hole-transporting materials (HTMs) based on three pyrrolo[3,2-b]pyrrole (PP) core building blocks with different fluorine substitutions were synthesized and applied in inverted perovskite solar cells (PSCs). The number and position of fluorine substitutions had a significant impact on the photochemical and photovoltaic performances of the resulting HTMs. The hexafluorine-substituted HTM, 6FPPY, exhibited excellent hole extraction efficiency and achieved a remarkable power conversion efficiency (PCE) of 20.1% with negligible hysteresis and good long-term stability. This work paves the way for the design of cost-effective, dopant-free HTMs for high-performance inverted PSCs.
Three pyrrolo[3,2-b]pyrrole (PP) core building block-based dopant-free hole-transporting materials (HTMs) with different fluorine substitutions are synthesized and applied in inverted perovskite solar cells (PSCs). The number and the position of fluorine substitutions display a significant effect on the photochemical and photovoltaic performances of the resulting HTMs. The hexafluorine-substituted HTM 6FPPY shows excellent hole extraction efficiency and achieves a prominent power conversion efficiency (PCE) of 20.1% with negligible hysteresis and good long-term stability. This work provides an avenue for the design of low-cost, dopant-free HTMs for high-performance inverted PSCs.
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