title: High performance organic-inorganic perovskite-optocoupler based on low-voltage and fast response perovskite compound photodetector.
abstract: Organic-inorganic hybrid photodetectors attract considerable attention because they can combine the advantages of both organic and inorganic systems. Here, a perovskite compound with a broad absorption spectrum and high power conversion efficiency is used as a photosensitive layer in an organic/inorganic hybrid heterojunction photodetector with a high and fast response. The high sensitivity exceeding 10(4) is obtained at bias of 0-4 V. Using a tandem organic light-emitting diode (OLED) as the light source, we fabricated an optocoupler device. The optocoupler achieved a maximum photoresponsivity of 1.0 A W(-1) at 341.3 μWcm(-2) at an input voltage of 6 V. The device also exhibits rapid response times of τ(rise) ~ 20 μs and τ(fall) ~ 17 μs; as well as a high current transfer ratio (CTR) of 28.2%. After applying an amplification circuit, the CTR of the optocoupler increases to 263.3%, which is comparable with that of commercial inorganic optocouplers. The developed hybrid optocoupler thus shows great promise for use in photonics.
authors.affiliation: Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084, China.
authors.forename: Dong
authors.initials: D
authors.lastname: Li
authors.affiliation: Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084, China.
authors.forename: Guifang
authors.initials: G
authors.lastname: Dong
authors.affiliation: Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084, China.
authors.forename: Wenzhe
authors.initials: W
authors.lastname: Li
authors.affiliation: Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084, China.
authors.forename: Liduo
authors.initials: L
authors.lastname: Wang