Bidirectional photoresponses (BPR) are significant, yet rare in conventional optoelectronic systems. In this letter, we achieve BPR in the inorganic-organic semiconductors hybrid phototransistors (HPTs) by introducing Schottky contact at metal-semiconductor interfaces. The Schottky contact enables the HPTs with distinguishable positive and negative photoresponses to ultraviolet and near-infrared light, respectively, capable of differentiating incident light wavelengths. Our results provide an efficient solution to achieve BPR, promising for wavelength differentiating and advanced optoelectronic sensors.
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Li et al. (2022) studied this question.
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