title: Stable and efficient hole transporting materials with a dimethylfluorenylamino moiety for perovskite solar cells.
abstract: Novel star-shaped hole transporting materials (HTMs) with a bis-dimethylfluorenylamino moiety have been synthesized and evaluated for high performance perovskite solar cell applications. Maximum power conversion efficiency of 14.21% has been achieved by using the HTM with a fused TPA core and the long-term stability was also shown to be comparable with that of .
authors.affiliation: Department of Advanced Material Chemistry, Korea University Sejong Campus, Sejong-ro 2511, Sejong City 339-700, Republic of Korea. jko@korea.ac.kr.
authors.forename: Hyeju
authors.initials: H
authors.lastname: Choi
authors.forename: Jin Woo
authors.initials: JW
authors.lastname: Cho
authors.forename: Moon-Sung
authors.initials: MS
authors.lastname: Kang
authors.forename: Jaejung
authors.initials: J
authors.lastname: Ko