A Simple-Structured Perovskite Wavelength Sensor for Full-Color Imaging Application.
basic_science · Level V
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- Record sourced from PubMed, PMID 36595350.
- Also identified by DOI 10.1021/acs.nanolett.2c03932.
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Abstract
In this study, simple-structured wavelength sensors were developed by depositing two back-to-back Au/MAPbI<sub>3</sub>/Au photodetectors on an MAPbI<sub>3</sub> single crystal. This sensor could quantitatively distinguish wavelengths. Further device analysis showed that both photodetectors possess entirely disparate optoelectronic properties. Consequently, the as-developed wavelength sensor could accurately distinguish incident-light wavelengths ranging from 265 to 860 nm with a resolution of less than 1.5 nm based on the relation between the photocurrent ratios of both photodetectors and the incident light wavelengths. Notably, a high resolution and wide detection range are among the optimum reported values for such sensors and enable full-color imaging. Furthermore, technology computer-aided design (TCAD) simulations showed that a mechanism involved in distinguishing wavelengths is attributed to the wavelength-dependent photon generation rate in MAPbI<sub>3</sub> single crystals. The high-performance MAPbI<sub>3</sub> wavelength sensor can potentially drive the research progress of perovskites in wavelength recognition and full-color imaging.