What question did this study set out to answer?

This research aims to develop a self-powered photodetector with broad spectral absorption and fast response.

March 25, 2026MaterialsOpen Access

A Broad-Band Self-Powered Photodetector Based on a MoTe2/Bi2Te3 Heterojunction for Optical Imaging and Bias-Controlled Signal Modulation

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Demonstrates enhanced responsivity and detectivity in optical imaging with a novel heterojunction, suggesting potential use in signal modulation.

This research aims to develop a self-powered photodetector with broad spectral absorption and fast response.
Constructed a MoTe2/Bi2Te3 heterostructure.
Evaluated photoelectric properties under various biases and illumination intensities.
Measured responsivity and detectivity across different wavelengths.
Achieved a responsivity of 1.38 A/W and detectivity of 1.90 × 10^12 Jones at 532 nm.
Under reverse bias, responsivity increased to 36.22 A/W.
Demonstrated low dark current of 1.6 × 10−12 A.

Du et al. (2026) studied this question.

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Demonstrates enhanced responsivity and detectivity in optical imaging with a novel heterojunction, suggesting potential use in signal modulation.