title: Highly Efficient p-i-n Perovskite Solar Cells Utilizing Novel Low-Temperature Solution-Processed Hole Transport Materials with Linear π-Conjugated Structure.
abstract: Alternative low-temperature solution-processed hole-transporting materials (HTMs) without dopant are critical for highly efficient perovskite solar cells (PSCs). Here, two novel small molecule HTMs with linear π-conjugated structure, 4,4'-bis(4-(di-p-toyl)aminostyryl)biphenyl (TPASBP) and 1,4'-bis(4-(di-p-toyl)aminostyryl)benzene (TPASB), are applied as hole-transporting layer (HTL) by low-temperature (sub-100 °C) solution-processed method in p-i-n PSCs. Compared with standard poly(3,4-ethylenedioxythiophene): poly(styrenesulfonic acid) (PEDOT:PSS) HTL, both TPASBP and TPASB HTLs can promote the growth of perovskite (CH3NH3PbI3) film consisting of large grains and less grain boundaries. Furthermore, the hole extraction at HTL/CH3NH3PbI3interface and the hole transport in HTL are also more efficient under the conditions of using TPASBP or TPASB as HTL. Hence, the photovoltaic performance of the PSCs is dramatically enhanced, leading to the high efficiencies of 17.4% and 17.6% for the PSCs using TPASBP and TPASB as HTL, respectively, which are ≈40% higher than that of the standard PSC using PEDOT:PSS HTL.
authors.affiliation: Key Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing, 100044, China.|Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing, 100044, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Li
authors.affiliation: Key Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing, 100044, China. zhengxu@bjtu.edu.cn.|Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing, 100044, China. zhengxu@bjtu.edu.cn.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Xu
authors.affiliation: Key Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing, 100044, China.|Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing, 100044, China.
authors.forename: Suling
authors.initials: S
authors.lastname: Zhao
authors.affiliation: Key Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing, 100044, China.|Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing, 100044, China.
authors.forename: Bo
authors.initials: B
authors.lastname: Qiao
authors.affiliation: Key Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing, 100044, China.|Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing, 100044, China.
authors.forename: Di
authors.initials: D
authors.lastname: Huang
authors.affiliation: Key Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing, 100044, China.|Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing, 100044, China.
authors.forename: Ling
authors.initials: L
authors.lastname: Zhao
authors.affiliation: Key Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing, 100044, China.|Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing, 100044, China.
authors.forename: Jiao
authors.initials: J
authors.lastname: Zhao
authors.affiliation: Key Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing, 100044, China.|Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing, 100044, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Wang
authors.affiliation: Key Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing, 100044, China.|Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing, 100044, China.
authors.forename: Youqin
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, 300072, China. lixianggao@tju.edu.cn.|School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China. lixianggao@tju.edu.cn.
authors.forename: Xianggao
authors.initials: X
authors.lastname: Li
authors.affiliation: Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, 300072, China.|School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China.
authors.forename: Xicheng
authors.initials: X
authors.lastname: Liu
authors.affiliation: Key Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing, 100044, China.|Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing, 100044, China.
authors.forename: Xurong
authors.initials: X
authors.lastname: Xu
keywords: hole-transporting layer; p-i-n architecture; perovskite solar cells; small molecular