2D van der Waals Heterojunction of Organic and Inorganic Monolayers for High Responsivity Phototransistors

Zhao B, Gan Z, Johnson M, Najafidehaghani E, Rejek T, George A, Fink R, Turchanin A, Halik M (2021)


Publication Type: Journal article, Original article

Publication year: 2021

Journal

DOI: 10.1002/adfm.202105444

Abstract

Van der Waals (vdW) heterostructures composing of organic molecules with inorganic 2D crystals open the door to fabricate various promising hybrid devices. Here, a fully ordered organic self-assembled monolayer (SAM) to construct hybrid organic–inorganic vdW heterojunction phototransistors for highly sensitive light detection is used. The heterojunctions, formed by layering MoS2 monolayer crystals onto organic [12-(benzo[b]benzo[4,5]thieno[2,3-d]thiophen-2-yl)dodecyl)]phosphonic acid SAM, are characterized by Raman and photoluminescence spectroscopy as well as Kelvin probe force microscopy. Remarkably, this vdW heterojunction transistor exhibits a superior photoresponsivity of 475 A W−1 and enhanced external quantum efficiency of 1.45 × 105%, as well as an extremely low dark photocurrent in the pA range. This work demonstrates that hybridizing SAM with 2D materials can be a promising strategy for fabricating diversified optoelectronic devices with unique properties.

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How to cite

APA:

Zhao, B., Gan, Z., Johnson, M., Najafidehaghani, E., Rejek, T., George, A.,... Halik, M. (2021). 2D van der Waals Heterojunction of Organic and Inorganic Monolayers for High Responsivity Phototransistors. Advanced Functional Materials. https://dx.doi.org/10.1002/adfm.202105444

MLA:

Zhao, Baolin, et al. "2D van der Waals Heterojunction of Organic and Inorganic Monolayers for High Responsivity Phototransistors." Advanced Functional Materials (2021).

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