title: Pure Formamidinium-Based Perovskite Light-Emitting Diodes with High Efficiency and Low Driving Voltage.
abstract: A formamidinium(FA)-based perovskite showns superior optoelectronic properties including better stability than methylammonium-based counterparts. Pure FA-perovskite-based light-emitting diodes (LEDs) with high efficiency are reported. Interestingly, the LED clearly shows a sub-bandgap emission at 1.7 V (bandgap 2.3 eV). This important discovery provides further insights of the charge transport mechanism in perovskite-based optoelectronic devices.
authors.affiliation: Department of Materials Science and Engineering, University of California, Los Angeles, CA, 90095, USA.
authors.forename: Lei
authors.initials: L
authors.lastname: Meng
authors.affiliation: Department of Materials Science and Engineering, University of California, Los Angeles, CA, 90095, USA.|Advanced Optoelectronic Technology Center, National Cheng Kung University, Tainan, 70101, Taiwan.
authors.forename: En-Ping
authors.initials: EP
authors.lastname: Yao
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: Huajun
authors.initials: H
authors.lastname: Chen
authors.affiliation: Department of Materials Science and Engineering, University of California, Los Angeles, CA, 90095, USA.
authors.forename: Pengyu
authors.initials: P
authors.lastname: Sun
authors.affiliation: Department of Materials Science and Engineering, University of California, Los Angeles, CA, 90095, USA.
authors.forename: Zhanlue
authors.initials: Z
authors.lastname: Yang
authors.affiliation: Department of Materials Science and Engineering, University of California, Los Angeles, CA, 90095, USA.|Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
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.
authors.forename: Yang
authors.initials: Y
authors.lastname: Yang
keywords: formamidinium; light-emitting diodes; perovskites; sub-bandgap emissions