A strategic review of recent progress, prospects and challenges of MoS₂-based photodetectors

Abstract

Two-dimensional layered materials have emerged prominently in the past decade, largely being investigated fundamentally and practically. Their unique layered structure and atomic-scale thickness make them attractive with exclusive electrical and optical properties compared to their bulk counterparts. Molybdenum disulfide (MoS2) is the most widely studied material in the family of transition metal dichalcogenides. The direct and variable bandgap, high carrier mobility, thermal and chemical stability makes it an attractive choice for next-generation photodetector applications. MoS2 heterojunction-based photodetectors offer ultrafast charge transfer and broadband photoresponse, adding more functionality beyond their individual counterparts. Enormous efforts have been devoted to adopting a new strategy that can improve photodetector performance in terms of responsivity and response time. This review briefly discusses the photo-induced current mechanism and performance parameters along with some important aspects to realize better device performance. Here, we critically review the current status and progress made towards MoS2-based photodetectors, followed by a discussion on open challenges and opportunities in their future application.

All‐Printed Ultrahigh‐Responsivity MoS2 Nanosheet Photodetectors Enabled by Megasonic Exfoliation

“…The net effect is that our devices show superlative performance with competitive response times and over three orders of magnitude higher responsivity than previously reported all-printed photodetectors in the visible light spectrum (Figure 4f; Table S2, Supporting Information). [22][23][24][26][27][28][29]…”

“…A tradeoff between responsivity and time response is observed, where a long lifetime of trapped charges increases photocurrent gain but also slows down the temporal response. [ 27 ] While the fastest response time yields a responsivity of 1.8 × 10 3 A W −1 with a response time of ≈1–2 ms, the maximum responsivity obtained was 8.6 × 10 3 A W −1 with a response time of ≈3 s (Figure 4f). Our all‐printed photodetectors exhibit relatively fast response times compared to some examples of ≈1 s timescales reported for CVD‐grown and mechanically exfoliated MoS 2 photodetectors with comparatively high responsivities.…”

Flexible, environmentally-acceptable and long-durable-energy-efficient novel WS2–polyacrylamide MOFs for high-performance photodetectors

“…13 No doubt, 2D materials exhibit excellent optical and electronic properties, which enhance the parameters of photodetectors in comparison to other materials, but the problem is the complexity of fabricating these devices. [14][15][16] In the current scenario, polymeric-inorganic nanohybrid type metallopolymers/MOFs materials have been adopted for nextgeneration devices because of the advanced properties generated by the conjugation of polymeric and inorganic hybrid materials. [17][18][19] Xianguang Yang et al reported the broadband photodetector based on the CdSe-ZnS core-shell type materials incorporated in the polyaniline nanowire exhibited R l and EQE of 10 5 A W À1 and 10 6 , respectively.…”

First principles study on structural, electronic and optical properties of HfS2(1−x)Se2x and ZrS2(1−x)Se2x ternary alloys

“…The exploration of novel semiconductors with favorable electronic and optical properties 1,2 is essential for the development of advanced optoelectronic devices, such as field effect transistors (FETs), 3 photodetectors, 4 phototransistors, 5 solar cells, 6 photovoltaics, 7 memory devices, 8 gas sensors, 9,10 fiber lasers 11 and photocatalysts. 7 In recent years, two-dimensional (2D) materials have attracted the attention of many researchers, because of their rich physics and potential electronic and optoelectronic applications.…”