Miniaturized Multispectral Detector Derived from Gradient Response Units on Single MAPbX3 Microwire

• DOI: 10.1002/adma.202108408
• Publication Date: 2021-12-22T20:24:18Z
• Authors: Xiaobao Xu; Zeyao Han; Yousheng Zou; Junyu Li; Yu Gu; Dawei Hu; Yin He; Jiaxin Liu; Dejian Yu; Fei Cao; Haibo Zeng
• Keywords: Prism

Miniaturized multispectral detectors are urgently desired given the unprecedented prosperity of smart optoelectronic chips for integrated functions including communication, imaging, scientific analysis, etc. However, require complicated prism optics or interference/interferometric filters spectral recognition, which hampers miniaturization and their subsequent integration in photonic circuits. In this work, inspired by advance computational optical-component-free miniaturized detector on 4 mm gradient bandgap MAPbX3 microwire with a diameter 30 µm, is reported. With accurate composition engineering, halide ions vary from Cl to I giving gradual variation optical 2.96 1.68 eV along axis. The sensing units offer response edge ranging 450 790 nm responsivity over 20 mA W-1 , -3dB width Hz, LDR ≈60 dB, noise current less than ≈1.4 × 10-12 A Hz-0.5 . As result, derived achieves function discrimination resolution ≈25 mismatch ≈10 nm. Finally, proof-of-concept colorful imaging successfully conducted further confirm its application recognition.