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Perovskite Solar Cells Employing Dopant‐Free Organic Hole Transport Materials with Tunable Energy Levels
Author(s) -
Liu Yongsheng,
Hong Ziruo,
Chen Qi,
Chen Huajun,
Chang WeiHsuan,
Yang Yang Michael,
Song TzeBin,
Yang Yang
Publication year - 2016
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201504293
Subject(s) - dopant , materials science , champion , perovskite (structure) , doping , conjugated system , valence (chemistry) , valence band , electron mobility , optoelectronics , engineering physics , nanotechnology , polymer , band gap , chemical engineering , physics , political science , law , composite material , engineering , quantum mechanics
Conjugated small‐molecule hole‐transport materials (HTMs) with tunable energy levels are designed and synthesized for efficient perovskite solar cells. A champion device with efficiency of 16.2% is demonstrated using a dopant‐free DERDTS‐TBDT HTM, while the DORDTS‐DFBT‐HTM‐based device shows an inferior performance of 6.2% due to its low hole mobility and unmatched HOMO level with the valence band of perovskite film.