Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 58, Issue 12, Pages 3784-3789Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201811593
Keywords
conformation analysis; conjugation; materials science; solar cells; structure elucidation
Categories
Funding
- National Natural Science Foundation of China [21788102, 21421004, 21636002, 21822504, 21706070]
- National key Research and Development Program [2016YFA0200300]
- Shanghai Municipal Science and Technology Major Project [2018SHZDZX03]
- Program of Introducing Talents of Discipline to Universities [B16017]
- Science and Technology Commission of Shanghai Municipality [17ZR1407400]
- China Association of Science and Technology [2017QNRC001]
- [TP2016018]
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The construction of state-of-the-art hole-transporting materials (HTMs) is challenging regarding the appropriate molecular configuration for simultaneously achieving high morphology uniformity and charge mobility, especially because of the lack of appropriate building blocks. Herein a semi-locked tetrathienylethene (TTE) serves as a promising building block for HTMs by fine-tuning molecular planarity. Upon incorporation of four triphenylamine groups, the resulting TTE represents the first hybrid orthogonal and planar conformation, thus leading to the desirable electronic and morphological properties in perovskite solar cells (PSCs). Owing to its high hole mobility, deep lying HOMO level, and excellent thin film quality, the dopant-free TTE-based PSCs exhibit a very promising efficiency of over 20 % with long-term stability, achieving to date the best performances among dopant-free HTM-based planar n-i-p structured PSCs.
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