期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 61, 期 30, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202203088
关键词
Hole Selective Layer; Interfaces; Perovskites; Self-Assembled Monolayer; Solar Cells
资金
- APRC Grant of the City University of Hong Kong [9380086]
- Innovation and Technology Fund [GHP/018/20SZ]
- GRF grant from the Research Grants Council of Hong Kong [11307621]
- Guangdong Major Project of Basic and Applied Basic Research [2019B030302007]
- Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials [2019B121205002]
This paper introduces a new method of using co-assembled monolayer (co-SAM) to achieve efficient hole selection and suppressed recombination in inverted perovskite solar cells (PSCs) by adjusting the position of substituents in the compound. By utilizing co-SAM, excellent performance and stability of the solar cells are achieved.
Self-assembled monolayers (SAMs) have been widely employed as an effective way to modify interfaces of electronic/optoelectronic devices. To achieve a good control of the growth and molecular functionality of SAMs, we develop a co-assembled monolayer (co-SAM) for obtaining efficient hole selection and suppressed recombination at the hole-selective interface in inverted perovskite solar cells (PSCs). By engineering the position of methoxy substituents, an aligned energy level and favorable dipole moment can be obtained in our newly synthesized SAM, ((2,7-dimethoxy-9H-carbazol-9-yl) methyl) phosphonic acid (DC-PA). An alkyl ammonium containing SAM is co-assembled to further optimize the surface functionalization and interaction with perovskite layer on top. A champion device with an excellent power conversion efficiency (PCE) of 23.59 % and improved device stability are achieved. This work demonstrates the advantage of using co-SAM in improving performance and stability of PSCs.
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