title: Compact Layer Free Perovskite Solar Cells with a High-Mobility Hole-Transporting Layer.
abstract: A high-mobility diketopyrrolopyrrole-based copolymer (P) was employed in compact layer free CH3NH3PbI3 perovskite solar cells as a hole-transporting layer (HTL). By using the P-HTL, the 6.62% device efficiency with conventional poly-3-hexylthiophene was increased to 10.80% in the simple device configuration (ITO/CH3NH3PbI3/HTL/MoO3/Ag). With improved short circuit current density, open circuit voltage, and fill factor, the higher power conversion efficiency of P-HTL device is ascribed to the higher carrier mobility, more suitable energy level, and lower interfacial charge recombination. Advantages of applying P-HTL to perovskite solar cells, such as low cost, low-temperature processing, and excellent performance with simple cell structure, exhibit a possibility for commercial applications.
authors.affiliation: College of Materials Science and Engineering, Qingdao University of Science and Technology , Qingdao, Shandong 266042, P. R. China.|Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao, Shandong 266101, P. R. China.
authors.forename: Qianqian
authors.initials: Q
authors.lastname: Zhu
authors.affiliation: Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao, Shandong 266101, P. R. China.
authors.forename: Xichang
authors.initials: X
authors.lastname: Bao
authors.affiliation: College of Materials Science and Engineering, Qingdao University of Science and Technology , Qingdao, Shandong 266042, P. R. China.
authors.forename: Jianhua
authors.initials: J
authors.lastname: Yu
authors.affiliation: Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao, Shandong 266101, P. R. China.
authors.forename: Dangqiang
authors.initials: D
authors.lastname: Zhu
authors.affiliation: Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao, Shandong 266101, P. R. China.
authors.forename: Meng
authors.initials: M
authors.lastname: Qiu
authors.affiliation: Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao, Shandong 266101, P. R. China.
authors.forename: Renqiang
authors.initials: R
authors.lastname: Yang
authors.affiliation: College of Materials Science and Engineering, Qingdao University of Science and Technology , Qingdao, Shandong 266042, P. R. China.|Department of Physics, Hamline University , St. Paul, Minnesota 55104, United States.
authors.forename: Lifeng
authors.initials: L
authors.lastname: Dong
keywords: compact layer free; diketopyrrolopyrrole-based copolymer; hole-transporting layer; low-temperature processing; perovskite solar cells; solution processing