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Solution-Processed Sb2S3-Based Heterojunction for Self-Powered Broad Band Weak Light Detection
Akshay Vishwanathan Vidyanagar1, S Venkataprasad Bhat1
1Green Energy Materials Laboratory, Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur 603 203, India.
ACS Applied Materials & Interfaces
|January 8, 2024
Summary
Researchers developed a novel, low-temperature solution-processed antimony sulfide (Sb2S3) photodetector. This self-powered device demonstrates high performance for white light detection, paving the way for new optoelectronic applications.
Area of Science:
- Materials Science
- Optoelectronics
- Photovoltaics
Background:
- Antimony sulfide (Sb2S3) is a promising solar absorber material.
- Its use in white light photodetectors is underexplored.
- Low-temperature, solution-processed films are desirable for cost-effective fabrication.
Purpose of the Study:
- To develop a self-powered photodetector using Sb2S3.
- To investigate the performance of Sb2S3 for white light detection.
- To demonstrate a practical application of the photodetector.
Main Methods:
- Fabrication of Sb2S3 thin films via single-step spin coating of a novel precursor ink.
- Preparation of a TiO2/Sb2S3 heterojunction device.
- Characterization of the photodetector's performance under white light illumination.
Main Results:
- A TiO2/Sb2S3 heterojunction device achieved a power conversion efficiency of 1.22%.
- The self-powered photodetector exhibited a high on/off ratio of 2.2 × 104 under 1 sun illumination.
- The device demonstrated a fast response time of 98 ms and detected both strong and weak white light.
Conclusions:
- Low-temperature solution-processed Sb2S3 is suitable for self-powered photodetectors.
- The developed photodetector shows excellent performance for white light detection.
- The device has potential for applications like sunlight tracking systems.
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