Open AccessFast-Response Metal–Semiconductor–Metal Junction Ultraviolet Photodetector Based on ZnS:Mn Nanorod Networks via a Cost-Effective Method
Author(s) -
Sara Saeed,
Rucheng Dai,
Raheel Ahmed Janjua,
Da Huang,
He Wang,
Zhongping Wang,
Zejun Ding,
Zengming Zhang
Publication year - 2021
Publication title -
acs omega
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.779
H-Index - 40
ISSN - 2470-1343
DOI - 10.1021/acsomega.1c04981
Subject(s) - nanorod , materials science , responsivity , photodetection , ultraviolet , photoluminescence , semiconductor , optoelectronics , photodetector , metal , nanotechnology , metallurgy
In this work, Mn 2+ -doped ZnS nanorods were synthesized by a facile hydrothermal method. The morphology, structure, and composition of the as-prepared samples were investigated. The temperature-dependent photoluminescence of ZnS:Mn nanorods was analyzed, and the corresponding activation energies were calculated by using a simple two-step rate equation. Mn 2+ -related orange emission ( 4 T 1 → 6 A 1 ) demonstrates high stability and is comparatively less affected by the temperature variations than the defect-related emission. A metal-semiconductor-metal junction ultraviolet photodetector based on the nanorod networks has been fabricated by a cost-effective method. The device exhibits visible blindness, superior ultraviolet photodetection with a responsivity of 1.62 A/W, and significantly fast photodetection response with the rise and decay times of 12 and 25 ms, respectively.