Electroluminescent Devices Based on 2D Semiconducting Transition Metal Dichalcogenides. Issue 47 (17th August 2018)

• Record Type: Journal Article
• Authors: Wang, Junyong; Verzhbitskiy, Ivan; Eda, Goki
• Is Part Of: Advanced materials. Volume 30:Issue 47(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-08-17
• Subjects: 2D materials -- electroluminescence -- layered transition metal dichalcogenides; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.201802687
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract: Ultrathin layers of van der Waals inorganic semiconductors represent a new class of excitonic materials with attractive light‐emitting properties. Recent observation of valley polarization, optically pumped lasing, exciton–polaritons, and single‐photon emission highlights the exciting prospects for two‐dimensional (2D) semiconductors for applications in novel photonic devices. Development of efficient and reliable light sources based on excitonic electroluminescence in 2D semiconductors is of fundamental importance toward the practical implementation of photonic devices. Achieving electroluminescence in these atomically thin layers requires unconventional device designs and in‐depth understanding of the carrier injection and transport mechanisms. Herein, various strategies for electrically generating excitons in 2D semiconducting transition metal dichalcogenides such as monolayer MoS2 are reviewed and challenges and opportunities are outlined. Furthermore, novel device concepts such as tunable chiral emission, electrically driven quantum emission, and high‐frequency modulation are highlighted. Abstract : Excitonic van der Waals semiconductors are an attractive building block for constructing on‐chip nanophotonic devices with unconventional functionalities. The recent advances in the understanding and fabrication of excitonic electroluminescent devices based on atomically thin transition metal dichalcogenides such as monolayer MoS2 and WSe2 are reviewed. Various strategies for realizing efficient excitonic emission are discussed.