Open AccessTiO2/PFO inorganic-organic hybrid heterojunction for self-powered blue light photodetector
Author(s) -
Yanru Xie,
Yicun Yao,
Dong Zhang,
Hefu Li,
Qingru Wang,
Liqiang Zhang
Publication year - 2021
Publication title -
materials research express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 35
ISSN - 2053-1591
DOI - 10.1088/2053-1591/ac0f1c
Subject(s) - photocurrent , materials science , heterojunction , photodetection , photodetector , optoelectronics , responsivity , nanorod , blue light , polyfluorene , nanotechnology , polymer , conjugated system , composite material
Organic-inorganic hybrid heterojunction is very promising for low cost and high performance photodetection device application. We have fabricated a heterojunction composed of n-type inorganic TiO 2 nanorod arrays and p-type organic semiconductor polymer [9,9-bis-(2-ethylhexyl)-9H-fluorene-2,7-diyl] (PFO). A peak of 0.32 mA W −1 was observed locating at 410 nm in spectral responsivity curve. The photocurrent response was rapid, repeatable as well as consistent. Under weak blue light (410 nm, 75 μ W cm −2 ) irradiance, the rise time and decay time were observed to be 0.16 and 0.12 s, respectively. These results demonstrated that TiO 2 /PFO heterojuncton could bring prospect for the development of self-powered blue light photodetectors with high spectral selectivity.