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Cascade-type energy band design of black phosphorus photodetector with high performance

Abstract

Hybrid-induced photogating effect by colloidal quantum dots is usually utilized to optimize the performance of 2D-based photodetectors, where the 2D material is usually black phosphorus, transition metal dichalcogenides or graphene. However, the method of integrating single-layer light absorber material with 2D materials for increasing the photoresponse has suffered from the limited depletion width so that it can hardly achieve our anticipation. Here, we proposed hybrid BP/lead sulfide quantum dots photodetector with cascade-type energy band structure, which can largely improve the its performance compared with single-layer absorber. This device can obtain a high responsivity of 1.1×107 A/W, a high detectivity of 1.75×1015 Jones , and a low noise equivalent power of 4.3×10-7 pW/Hz1/2 simultaneously. These results indicate that a cascade-type energy band structure is not only able to effectively enhance the performance of hybrid BP/lead sulfide quantum dots photodetector but also has a great potential for widely application in other 2D material–based optoelectronic devices.

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Publication details

The article was received on 14 Nov 2018, accepted on 03 Dec 2018 and first published on 04 Dec 2018


Article type: Paper
DOI: 10.1039/C8TC05735D
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    Cascade-type energy band design of black phosphorus photodetector with high performance

    C. You, G. Zhang, W. Deng, C. Zhao, B. An, B. Liu, B. Wang, H. Yan, D. Liu and Y. Zhang, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC05735D

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