Santaella, JJ, Critchley, K orcid.org/0000-0002-0112-8626, Rodriguez-Bolivar, S et al. (1 more author) (2020) CuInS2/ZnS-based QLED design and modelling for automotive lighting systems. Nanotechnology. ISSN 0957-4484
Abstract
This work reports the design, manufacturing and numerical simulation approach of a 6-pixel (4.5mm2/pixel) electroluminescent quantum dot light emitting device (QLED) based on CuInS2/ZnS quantum dots as an active layer. Following a conventional thin-film deposition multilayer approach, the QLED device was fabricated. In addition, the electrical I-V curve was measured for each pixel independently, observing how the fabrication process and layer thickness have an influence in the shape of the plot. This experimental device fabricated, enabled us to create a computational model for the QLED based on the Transfer Hamiltonian approach to calculate the current density J(mA/cm2), the band diagram of the system, and the accumulated charge distribution. Besides, it is worth highlighting that the simulator allows the possibility to study the influence of different parameters of the QLED structure like the junction capacitance between the distinct multilayer set. Specifically, we found that Anode-HIL interface capacitance has a greater influence in the I-V plot shape. That junction capacitance plays an important role in the current increase and the QLED turn-on value when a forward voltage is applied to the device. Thanks to the simulator, that influence could be put under control by the selection of the optimal thickness and transport layers during the experimental fabrication process. This work is remarkable since it achieves to fit simulation and experiment results in an accurate way for electroluminescent QLED devices; particularly the simulation of the device current, which is critical when designing the automotive electronics to control these new nanotechnology lighting devices in the future.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 IOP Publishing Ltd. This is the Accepted Manuscript version of an article accepted for publication in Nanotechnology. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at doi.org/10.1088/1361-6528/abcced |
Keywords: | QLED; QLED modelling; QLED synthesis; charge transfer |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Molecular & Nanoscale Physics |
Funding Information: | Funder Grant number EPSRC (Engineering and Physical Sciences Research Council) EP/P005233/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 01 Dec 2020 16:02 |
Last Modified: | 23 Nov 2021 01:38 |
Status: | Published online |
Publisher: | IOP Publishing |
Identification Number: | 10.1088/1361-6528/abcced |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:168554 |
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Filename: Design_and_Fabrication_of_CuInS2_ZnS_based_QLED_for_Automotive_Lighting_Systems_v5_2_Sinnegrita.pdf
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