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Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
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Gradient Energy Band Driven High-Performance Self-Powered Perovskite/CdS Photodetector
Fengren Cao1, Linxing Meng1, Meng Wang1
1School of Physical Science and Technology, Center for Energy Conversion Materials & Physics (CECMP), Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou, 215006, P. R. China.
Advanced Materials (Deerfield Beach, Fla.)
|January 31, 2019
Summary
This study presents a novel self-powered photodetector using gradient O-doped CdS nanorods and perovskite. It achieves high detectivity and fast response, advancing sensing and imaging technologies.
Area of Science:
- Materials Science
- Optoelectronics
- Nanotechnology
Background:
- Self-powered photodetectors are crucial for sensing, communication, and imaging.
- Optimizing carrier dynamics is key to enhancing photodetector performance.
Purpose of the Study:
- To develop a high-performance self-powered photodetector.
- To investigate the role of gradient band bending in device performance.
Main Methods:
- Fabrication of a photodetector integrating gradient O-doped CdS nanorod array and perovskite.
- Optimization of built-in band bending in the gradient-O CdS layer.
- Characterization of photodetector performance including detectivity, responsivity, and response time.
Main Results:
- Achieved a remarkable detectivity of 2.1 × 1013 Jones.
- Demonstrated a high responsivity of 0.48 A W-1 under self-powered conditions.
- Exhibited fast response times of 0.54 ms (rise) and 2.21 ms (decay).
Conclusions:
- The gradient band bending effectively promotes carrier transfer and suppresses recombination.
- The developed photodetector shows superior performance compared to existing self-powered devices.
- This work offers a promising pathway for advanced self-powered optoelectronic applications.
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