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Thin MAPb0.5Sn0.5I3 Perovskite Single Crystals for Sensitive Infrared Light Detection
Jinming Wu1, Yongqiang Zhang2, Shuang Yang3
1State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, China.
Frontiers in Chemistry
|January 31, 2022
Summary
Researchers developed tin-doped methylammonium lead iodide (MAPbI3) single crystals for sensitive near-infrared (NIR) detection. These novel detectors show high performance and stability, extending perovskite applications.
Area of Science:
- Materials Science
- Optoelectronics
- Solid-State Physics
Background:
- Metal halide perovskite single crystals offer excellent detector properties like low noise and high sensitivity.
- Current lead-based perovskites have limited photoresponse ranges, hindering near-infrared (NIR) detection capabilities.
Purpose of the Study:
- To extend the photoresponse range of perovskite single crystals into the NIR region.
- To develop highly sensitive and stable NIR detectors using tin-doped perovskites.
Main Methods:
- Incorporation of tin (Sn) into methylammonium lead iodide (MAPbI3) single crystals.
- Fabrication of thin films (15 μm) using a space-confined strategy.
- Characterization of detector performance under 905 nm light illumination.
Main Results:
- Achieved extended absorption up to 950 nm with MAPb0.5Sn0.5I3 single crystals.
- Demonstrated high responsivity (0.514 A/W) and specific detectivity (1.4974×10^11 cmHz^1/2/W).
- Observed good operational stability of the NIR detectors for approximately 30,000 seconds.
Conclusions:
- Tin doping effectively extends the absorption range of perovskite single crystals for NIR detection.
- The developed MAPb0.5Sn0.5I3 single-crystal detectors exhibit promising performance and stability.
- This approach offers a viable pathway for advanced NIR sensing applications.
