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A Strategy to Design a Donor–π–Acceptor Polymeric Hole Conductor for an Efficient Perovskite Solar Cell
Author(s) -
Kim GuanWoo,
Kim Jinseck,
Lee GangYoung,
Kang Gyeongho,
Lee Jaechul,
Park Taiho
Publication year - 2015
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201500471
Subject(s) - materials science , perovskite (structure) , solar cell , energy conversion efficiency , acceptor , perovskite solar cell , lithium (medication) , polymer , hybrid solar cell , organic solar cell , nanotechnology , chemical engineering , polymer solar cell , optoelectronics , composite material , condensed matter physics , medicine , physics , endocrinology , engineering
A strategy for developing a novel donor–π–acceptor conducting polymeric hole transport material ( TTB–TTQ ) based on thiophene and benzothiadiazole as an alternative to spiro‐MeOTAD is reported. The resulting polymer is highly soluble in many organic solvents and exhibits excellent film formability. The addition of lithium bis(trifluoromethanesulfonyl) imide salt and tert ‐butylpyridine to TTB–TTQ results in a rough film surface with a fibril structure and improved charge transport. A perovskite solar cell with the highest power conversion efficiency ( η ) yet achieved in such cells, 14.1%, which is 22.6% greater than that of a device employing a spiro‐MeOTAD is demonstrated. This strategy provides a novel approach to developing solar cell materials for efficient perovskite solar cells.