학술논문
Silver nanowire electrodes for transparent light emitting devices based on WS 2 monolayers.
Document Type
Academic Journal
Author
Myja H; Werkstoffe der Elektrotechnik and CENIDE, University Duisburg-Essen, D-47057 Duisburg, Germany.; Yang Z; Department of Electrical & Computer Engineering and WIN, University of Waterloo, Waterloo, ON N2L 3G1, Canada.; Goldthorpe IA; Department of Electrical & Computer Engineering and WIN, University of Waterloo, Waterloo, ON N2L 3G1, Canada.; Jones AJB; Department of Mechanical & Mechatronics Engineering and WIN, University of Waterloo, Waterloo, ON N2L 3G1, Canada.; Musselman KP; Department of Mechanical & Mechatronics Engineering and WIN, University of Waterloo, Waterloo, ON N2L 3G1, Canada.; Grundmann A; Compound Semiconductor Technology, RWTH Aachen University, D-52074 Aachen, Germany.; Kalisch H; Compound Semiconductor Technology, RWTH Aachen University, D-52074 Aachen, Germany.; Vescan A; Compound Semiconductor Technology, RWTH Aachen University, D-52074 Aachen, Germany.; Heuken M; Compound Semiconductor Technology, RWTH Aachen University, D-52074 Aachen, Germany.; AIXTRON SE, D-52134 Herzogenrath, Germany.; Kümmell T; Werkstoffe der Elektrotechnik and CENIDE, University Duisburg-Essen, D-47057 Duisburg, Germany.; Bacher G; Werkstoffe der Elektrotechnik and CENIDE, University Duisburg-Essen, D-47057 Duisburg, Germany.
Source
Publisher: IOP Pub Country of Publication: England NLM ID: 101241272 Publication Model: Electronic Cited Medium: Internet ISSN: 1361-6528 (Electronic) Linking ISSN: 09574484 NLM ISO Abbreviation: Nanotechnology Subsets: PubMed not MEDLINE; MEDLINE
Subject
Language
English
Abstract
Transition metal dichalcogenide (TMDC) monolayers with their direct band gap in the visible to near-infrared spectral range have emerged over the past years as highly promising semiconducting materials for optoelectronic applications. Progress in scalable fabrication methods for TMDCs like metal-organic chemical vapor deposition (MOCVD) and the ambition to exploit specific material properties, such as mechanical flexibility or high transparency, highlight the importance of suitable device concepts and processing techniques. In this work, we make use of the high transparency of TMDC monolayers to fabricate transparent light-emitting devices (LEDs). MOCVD-grown WS 2 is embedded as the active material in a scalable vertical device architecture and combined with a silver nanowire (AgNW) network as a transparent top electrode. The AgNW network was deposited onto the device by a spin-coating process, providing contacts with a sheet resistance below 10 Ω sq -1 and a transmittance of nearly 80%. As an electron transport layer we employed a continuous 40 nm thick zinc oxide (ZnO) layer, which was grown by atmospheric pressure spatial atomic layer deposition (AP-SALD), a precise tool for scalable deposition of oxides with defined thickness. With this, LEDs with an average transmittance over 60% in the visible spectral range, emissive areas of several mm 2 and a turn-on voltage of around 3 V are obtained.
(Creative Commons Attribution license.)
(Creative Commons Attribution license.)