Engineering the optoelectronic properties of MoS2 photodetectors through reversible noncovalent functionalization

TL;DR

This paper introduces a simple, reversible, and stable method to enhance MoS2 photodetectors' performance by functionalizing them with molecular dyes, significantly increasing their responsivity.

Contribution

It demonstrates a straightforward drop-casting functionalization technique that boosts photodetector responsivity by four orders of magnitude, enabling advanced 2D-materials applications.

Findings

Photoresponse increased by about four orders of magnitude

Responsivities up to 100 A/W achieved

Functionalization is reversible and air-stable

Abstract

We present an easy drop-casting based functionalization of MoS2-based photodetectors that results in an enhancement of the photoresponse of about four orders of magnitude, reaching responsivities up to 100 A/W. The functionalization is technologically trivial, air-stable, fully reversible and reproducible, and opens the door to the combination of 2D-materials with molecular dyes for the development of high performance photodetectors.