期刊
SOLAR RRL
卷 6, 期 11, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/solr.202200590
关键词
enamines; hole-transporting materials; perovskite solar cells
资金
- Research Council of Lithuania [01.2.2-LMT-K-718-03-0040]
- MJJ Foundation
- Japan Society for the Promotion of Science [JP20K22531, JP22K14744, JP21H04699]
- JST-MIRAI [JPMJMI22E2]
- JST-COI [JPMJCE1307]
- JST-CREST [JPMJCR16N3]
- NEDO programs
- International Collaborative Research Program of ICR
- ICR Grants for Promoting Integrated Research (Kyoto University)
This study designs and synthesizes a series of HTMs with different central heteroatom cores and molecular structures, which exhibit comparable performance to spiro-OMeTAD in PSCs. The work demonstrates how high-performing HTMs for PSCs can be produced using a simple condensation approach.
Stabilizing the high-performing perovskite solar cells (PSCs) with low-cost and simply affordable hole-transporting materials (HTMs) has been identified as an ongoing ambitious challenge. Herein, a series of enamine-based HTMs having different central heteroatoms (C, N, O, and S) and a number of enamine branches is designed and synthesized. The impact of varied central heteroatom cores is investigated in-depth including thermal, photophysical, and photovoltaic properties. Importantly, molecularly engineered HTMs are obtained by a single condensation reaction without the need for expensive catalysts, inert reaction conditions, or tedious product purification. PSCs with a power conversion efficiency (PCE) of over 20% can be realized with the triphenylamine core HTM (V1435), a result comparable with spiro-OMeTAD. HTMs based on tetraphenylmethane (V1431) and diphenyl sulfide (V1434) cores give a slightly lower performance under similar device fabrication conditions. This work demonstrates how rational molecular engineering of a simple condensation approach can produce HTMs for high-performing PSCs without sacrificing the PCE.
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