title: High-performance ultraviolet photodetector based on organic-inorganic hybrid structure.
abstract: An ultraviolet (UV) photodetector is fabricated by sandwiching a nanocomposite active layer between charge-selective semiconducting polymers. The nanocomposite active layer composed of TiO2 nanoparticles (NPs) blended with 1,3-bis(N-carbazolyl)benzene (mCP), which acts as a "valve" controller that enables hole injection into the device upon UV illumination. The UV photodetector demonstrated a high photocurrent to dark current ratio (∼10(4)), a large linear dynamic range of 60 dB, and a remarkable external quantum efficiency (∼8.5 × 10(4)%) for the UV light at 351 nm. In addition to discussing the performance of the UV photodetector, a general strategy for design and fabrication of high-performance UV photodetectors with hole injection operation mode is suggested.
authors.affiliation: Department of Electrical, Computer, and Systems Engineering and ‡Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute , Troy, New York 12180, United States.
authors.forename: Dali
authors.initials: D
authors.lastname: Shao
authors.forename: Mingpeng
authors.initials: M
authors.lastname: Yu
authors.forename: Hongtao
authors.initials: H
authors.lastname: Sun
authors.forename: Guoqing
authors.initials: G
authors.lastname: Xin
authors.forename: Jie
authors.initials: J
authors.lastname: Lian
authors.forename: Shayla
authors.initials: S
authors.lastname: Sawyer