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Buried Grating Enables Fast Response Self-Powered Polarization-Sensitive Perovskite Photodetectors for High-Speed
Yuxuan Sun1, Jiang Wang1, Jingjing Liu2,3
1School of Artificial Intelligence, Optics and Electronics (iOPEN), Northwestern Polytechnical University, Xi'an, 710072, China.
Small (Weinheim an Der Bergstrasse, Germany)
|March 19, 2025
Summary
This study introduces a self-powered polarization-sensitive perovskite photodetector (PSPPD) using buried grating structures. This device achieves fast response and long-term stability for advanced optical applications.
Area of Science:
- Materials Science
- Optoelectronics
- Nanotechnology
Background:
- Polarization-sensitive perovskite photodetectors (PSPPDs) are crucial for multidimensional data acquisition in remote sensing and optical communications.
- Existing PSPPDs face limitations including external power needs, slow response times, and poor long-term stability.
Purpose of the Study:
- To design and demonstrate a self-powered PSPPD with enhanced performance and stability.
- To overcome the limitations of conventional PSPPDs by integrating buried grating structures.
Main Methods:
- Fabrication of a self-powered PSPPD utilizing ultrafast laser direct writing to create buried grating structures.
- Characterization of the photodetector's polarization sensitivity, response speed, and long-term stability.
Main Results:
- The developed PSPPD achieves high external quantum efficiency (93.93% at 532 nm, 0 V bias) and responsivity (403 mA W⁻¹ at 532 nm, 0 V bias).
- The device exhibits an ultra-fast response time (rise/fall time < 2 µs) and excellent stability, maintaining high performance after 120 days of air exposure.
- The buried grating structure enhances light trapping and reduces reflection, enabling polarization detection without external optical components.
Conclusions:
- The self-powered PSPPD with buried gratings offers a promising solution for high-performance, stable, and economical polarization detection.
- This technology has significant potential for applications in fast optical communications and advanced sensing systems.
