title: Photovoltaics. Interface engineering of highly efficient perovskite solar cells.
abstract: Advancing perovskite solar cell technologies toward their theoretical power conversion efficiency (PCE) requires delicate control over the carrier dynamics throughout the entire device. By controlling the formation of the perovskite layer and careful choices of other materials, we suppressed carrier recombination in the absorber, facilitated carrier injection into the carrier transport layers, and maintained good carrier extraction at the electrodes. When measured via reverse bias scan, cell PCE is typically boosted to 16.6% on average, with the highest efficiency of ~19.3% in a planar geometry without antireflective coating. The fabrication of our perovskite solar cells was conducted in air and from solution at low temperatures, which should simplify manufacturing of large-area perovskite devices that are inexpensive and perform at high levels.
authors.affiliation: Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA. California NanoSystems Institute, University of California, Los Angeles, CA 90095, USA.
authors.forename: Huanping
authors.initials: H
authors.lastname: Zhou
authors.affiliation: Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA. California NanoSystems Institute, University of California, Los Angeles, CA 90095, USA.
authors.forename: Qi
authors.initials: Q
authors.lastname: Chen
authors.affiliation: Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA.
authors.forename: Gang
authors.initials: G
authors.lastname: Li
authors.affiliation: Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA. California NanoSystems Institute, University of California, Los Angeles, CA 90095, USA.
authors.forename: Song
authors.initials: S
authors.lastname: Luo
authors.affiliation: Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA. California NanoSystems Institute, University of California, Los Angeles, CA 90095, USA.
authors.forename: Tze-bing
authors.initials: TB
authors.lastname: Song
authors.affiliation: Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA. California NanoSystems Institute, University of California, Los Angeles, CA 90095, USA.
authors.forename: Hsin-Sheng
authors.initials: HS
authors.lastname: Duan
authors.affiliation: Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA.
authors.forename: Ziruo
authors.initials: Z
authors.lastname: Hong
authors.affiliation: Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA.
authors.forename: Jingbi
authors.initials: J
authors.lastname: You
authors.affiliation: Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA. California NanoSystems Institute, University of California, Los Angeles, CA 90095, USA.
authors.forename: Yongsheng
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA. California NanoSystems Institute, University of California, Los Angeles, CA 90095, USA. yangy@ucla.edu.
authors.forename: Yang
authors.initials: Y
authors.lastname: Yang