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Modeling and numerical simulation of electrical and optical characteristics of a quantum dot light-emitting diode based on the hopping mobility model: Influence of quantum dot concentration |
| Pezhman Sheykholeslami-Nasab, Mahdi Davoudi-Darareh†, and Mohammad Hassan Yousefi |
| Faculty of Science, Malek Ashtar University of Technology, Shahin-Shahr, Iran |
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Abstract We present a comprehensive numerical framework for the electrical and optical modeling and simulation of hybrid quantum dot light-emitting diodes (QD-LEDs). We propose a model known as hopping mobility to calculate the carrier mobility in the emissive organic layer doped with quantum dots (QDs). To evaluate the ability of this model to describe the electrical characteristics of QD-LEDs, the measured data of a fabricated QD-LED with different concentrations of QDs in the emissive layer were taken, and the corresponding calculations were performed based on the proposed model. The simulation results indicate that the hopping mobility model can describe the concentration dependence of the electrical behavior of the device. Then, based on the continuity equation for singlet and triplet excitons, the exciton density profiles of the devices with different QD concentrations were extracted. Subsequently, the corresponding luminance characteristics of the devices were calculated, where the results are in good agreement with the experimental data.
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Received: 12 August 2021
Revised: 28 October 2021
Accepted manuscript online: 04 November 2021
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PACS:
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85.60.Jb
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(Light-emitting devices)
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85.60.Bt
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(Optoelectronic device characterization, design, and modeling)
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Corresponding Authors:
Mahdi Davoudi-Darareh
E-mail: m.davoudi@mut-es.ac.ir
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Cite this article:
Pezhman Sheykholeslami-Nasab, Mahdi Davoudi-Darareh, and Mohammad Hassan Yousefi Modeling and numerical simulation of electrical and optical characteristics of a quantum dot light-emitting diode based on the hopping mobility model: Influence of quantum dot concentration 2022 Chin. Phys. B 31 068504
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