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Related Experiment Video

Updated: Dec 23, 2025

Synthesis and Characterization of High c-axis ZnO Thin Film by Plasma Enhanced Chemical Vapor Deposition System and its UV Photodetector Application

Synthesis and Characterization of High c-axis ZnO Thin Film by Plasma Enhanced Chemical Vapor Deposition System and its UV Photodetector Application

Published on: October 3, 2015

Atomically Thin Oxyhalide Solar-Blind Photodetectors.

Wei Han¹, Chen Li², Sanjun Yang¹

¹State Key Laboratory of Material Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, 430074, P. R. China.

Small (Weinheim an Der Bergstrasse, Germany)

|April 30, 2020

Summary

High-responsivity solar-blind photodetectors were developed using 2D bismuth oxychloride (BiOCl) flakes. These devices show promise for solar-blind ultraviolet detection, especially at elevated temperatures.

Keywords:

2D materials bismuth oxyhalide chemical vapor deposition solar-blind ultraviolet photodetectors

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Published on: July 31, 2016

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Last Updated: Dec 23, 2025

Synthesis and Characterization of High c-axis ZnO Thin Film by Plasma Enhanced Chemical Vapor Deposition System and its UV Photodetector Application

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Published on: July 31, 2016

Area of Science:

Materials Science
Optoelectronics
Nanotechnology

Background:

Two-dimensional (2D) wide-bandgap semiconductors offer potential for solar-blind ultraviolet (SBUV) photodetectors.
Low responsivity in current 2D SBUV photodetectors hinders practical applications.

Purpose of the Study:

To achieve high-responsivity SBUV photodetectors using 2D bismuth oxychloride (BiOCl) flakes.
To investigate the effect of ambient temperature on the performance of BiOCl-based photodetectors.

Main Methods:

Fabrication of SBUV photodetectors using 2D BiOCl flakes.
Characterization of photodetector performance under 250 nm illumination.
In situ transmission electron microscopy to observe material changes at elevated temperatures.

Main Results:

The 2D BiOCl photodetectors achieved a responsivity of 35.7 A W⁻¹ and detectivity of 2.2 × 10¹⁰ Jones at room temperature.
Responsivity significantly increased to 2060 A W⁻¹ at 450 K.
Defective BiOCl grains were observed at higher temperatures, potentially explaining the enhanced performance.

Conclusions:

2D BiOCl is a promising material for high-responsivity SBUV photodetectors.
Elevated temperatures can dramatically enhance the performance of BiOCl-based photodetectors.
Defect engineering in BiOCl warrants further investigation for SBUV applications.