High-Performance and Stable Dual-Nanograting-Perovskite-Based Near-Infrared Photodetector.
basic_science · Level V
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- Record sourced from PubMed, PMID 41194322.
- Also identified by DOI 10.1002/adma.202515848.
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Abstract
Potential applications of perovskite materials in near-infrared (NIR) photodetectors are hindered by their instability and low absorption. In this study, dual nanogratings and upconversion nanoparticles (NaYF<sub>4</sub>:20%Yb, 2%Er) are introduced to enhance the stability of MAPbBr<sub>3</sub> and extend its spectral response to the NIR range. A photodetector with responsivity of 2.9 A·W<sup>-1</sup> and detectivity of 1.34×10<sup>11</sup> Jones at 980 nm is developed using this approach. The device maintained 78.6% performance after 4 months of air exposure and 72.4% performance after 3000 bending cycles, demonstrating significant improvements in stability and flexibility.