title: Perovskite solar cell using a two-dimensional titania nanosheet thin film as the compact layer.
abstract: The compact layer plays an important role in conducting electrons and blocking holes in perovskite solar cells (PSCs). Here, we use a two-dimensional titania nanosheet (TNS) thin film as the compact layer in CH3NH3PbI3 PSCs. TNS thin films with thicknesses ranging from 8 to 75 nm were prepared by an electrophoretic deposition method from a dilute TNS/tetrabutylammonium hydroxide solution. The TNS thin films contact the fluorine-doped tin oxide grains perfectly. Our results show that a 8-nm-thick TNS film is sufficient for acting as the compact layer. Currently, the PSC with a TNS compact layer has a high efficiency of 10.7% and relatively low hysteresis behavior.
authors.affiliation: †Key Lab for Advance Materials Processing Technology of Education Ministry, State Key Lab of New Ceramic and Fine Processing, and School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P. R. China.
authors.forename: Can
authors.initials: C
authors.lastname: Li
authors.affiliation: †Key Lab for Advance Materials Processing Technology of Education Ministry, State Key Lab of New Ceramic and Fine Processing, and School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P. R. China.
authors.forename: Yahui
authors.initials: Y
authors.lastname: Li
authors.affiliation: ‡State Key Laboratory of Fine Chemicals, School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China.
authors.forename: Yujin
authors.initials: Y
authors.lastname: Xing
authors.affiliation: †Key Lab for Advance Materials Processing Technology of Education Ministry, State Key Lab of New Ceramic and Fine Processing, and School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P. R. China.
authors.forename: Zelin
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: §National Center for Nanoscience and Technology, Beiyitiao 11, Beijing 100190, P. R. China.
authors.forename: Xianfeng
authors.initials: X
authors.lastname: Zhang
authors.affiliation: ⊥National Renewable Energy Laboratory, Golden, Colorado 80401, United States.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Li
authors.affiliation: ‡State Key Laboratory of Fine Chemicals, School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China.
authors.forename: Yantao
authors.initials: Y
authors.lastname: Shi
authors.affiliation: ‡State Key Laboratory of Fine Chemicals, School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China.
authors.forename: Tingli
authors.initials: T
authors.lastname: Ma
authors.affiliation: ∥National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan.
authors.forename: Renzhi
authors.initials: R
authors.lastname: Ma
authors.affiliation: †Key Lab for Advance Materials Processing Technology of Education Ministry, State Key Lab of New Ceramic and Fine Processing, and School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P. R. China.
authors.forename: Kunlin
authors.initials: K
authors.lastname: Wang
authors.affiliation: †Key Lab for Advance Materials Processing Technology of Education Ministry, State Key Lab of New Ceramic and Fine Processing, and School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P. R. China.
authors.forename: Jinquan
authors.initials: J
authors.lastname: Wei
keywords: compact layer; electrophoretic deposition; perovskite solar cell; titania nanosheet