Modelling charge transport and electro-optical characteristics of quantum dot light-emitting diodes
Abstracts Quantum dot light-emitting diodes (QD-LEDs) are considered as competitive candidate for next-generation displays or lightings. Recent advances in the synthesis of core/shell quantum dots (QDs) and tailoring procedures for achieving their high quantum yield have facilitated the emergence of...
| Main Authors: | , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2021-07-01
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| Series: | npj Computational Materials |
| Online Access: | https://doi.org/10.1038/s41524-021-00591-9 |
| _version_ | 1828970195466584064 |
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| author | Sung-Min Jung Tae Hoon Lee Sang Yun Bang Soo Deok Han Dong-Wook Shin Sanghyo Lee Hyung Woo Choi Yo-Han Suh Xiang-Bing Fan Jeong-Wan Jo Shijie Zhan Jiajie Yang Chatura Samarakoon Yoonwoo Kim Luigi G. Occhipinti Gehan Amaratunga Jong Min Kim |
| author_facet | Sung-Min Jung Tae Hoon Lee Sang Yun Bang Soo Deok Han Dong-Wook Shin Sanghyo Lee Hyung Woo Choi Yo-Han Suh Xiang-Bing Fan Jeong-Wan Jo Shijie Zhan Jiajie Yang Chatura Samarakoon Yoonwoo Kim Luigi G. Occhipinti Gehan Amaratunga Jong Min Kim |
| author_sort | Sung-Min Jung |
| collection | DOAJ |
| description | Abstracts Quantum dot light-emitting diodes (QD-LEDs) are considered as competitive candidate for next-generation displays or lightings. Recent advances in the synthesis of core/shell quantum dots (QDs) and tailoring procedures for achieving their high quantum yield have facilitated the emergence of high-performance QD-LEDs. Meanwhile, the charge-carrier dynamics in QD-LED devices, which constitutes the remaining core research area for further improvement of QD-LEDs, is, however, poorly understood yet. Here, we propose a charge transport model in which the charge-carrier dynamics in QD-LEDs are comprehensively described by computer simulations. The charge-carrier injection is modelled by the carrier-capturing process, while the effect of electric fields at their interfaces is considered. The simulated electro-optical characteristics of QD-LEDs, such as the luminance, current density and external quantum efficiency (EQE) curves with varying voltages, show excellent agreement with experiments. Therefore, our computational method proposed here provides a useful means for designing and optimising high-performance QD-LED devices. |
| first_indexed | 2024-12-14T12:45:26Z |
| format | Article |
| id | doaj.art-b5a1e8a8ae7c4555b472795911191eb7 |
| institution | Directory Open Access Journal |
| issn | 2057-3960 |
| language | English |
| last_indexed | 2024-12-14T12:45:26Z |
| publishDate | 2021-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Computational Materials |
| spelling | doaj.art-b5a1e8a8ae7c4555b472795911191eb72022-12-21T23:00:47ZengNature Portfolionpj Computational Materials2057-39602021-07-017111110.1038/s41524-021-00591-9Modelling charge transport and electro-optical characteristics of quantum dot light-emitting diodesSung-Min Jung0Tae Hoon Lee1Sang Yun Bang2Soo Deok Han3Dong-Wook Shin4Sanghyo Lee5Hyung Woo Choi6Yo-Han Suh7Xiang-Bing Fan8Jeong-Wan Jo9Shijie Zhan10Jiajie Yang11Chatura Samarakoon12Yoonwoo Kim13Luigi G. Occhipinti14Gehan Amaratunga15Jong Min Kim16Electrical Engineering Division, Department of Engineering, University of CambridgeElectrical Engineering Division, Department of Engineering, University of CambridgeElectrical Engineering Division, Department of Engineering, University of CambridgeElectrical Engineering Division, Department of Engineering, University of CambridgeElectrical Engineering Division, Department of Engineering, University of CambridgeElectrical Engineering Division, Department of Engineering, University of CambridgeElectrical Engineering Division, Department of Engineering, University of CambridgeElectrical Engineering Division, Department of Engineering, University of CambridgeElectrical Engineering Division, Department of Engineering, University of CambridgeElectrical Engineering Division, Department of Engineering, University of CambridgeElectrical Engineering Division, Department of Engineering, University of CambridgeElectrical Engineering Division, Department of Engineering, University of CambridgeElectrical Engineering Division, Department of Engineering, University of CambridgeElectrical Engineering Division, Department of Engineering, University of CambridgeElectrical Engineering Division, Department of Engineering, University of CambridgeElectrical Engineering Division, Department of Engineering, University of CambridgeElectrical Engineering Division, Department of Engineering, University of CambridgeAbstracts Quantum dot light-emitting diodes (QD-LEDs) are considered as competitive candidate for next-generation displays or lightings. Recent advances in the synthesis of core/shell quantum dots (QDs) and tailoring procedures for achieving their high quantum yield have facilitated the emergence of high-performance QD-LEDs. Meanwhile, the charge-carrier dynamics in QD-LED devices, which constitutes the remaining core research area for further improvement of QD-LEDs, is, however, poorly understood yet. Here, we propose a charge transport model in which the charge-carrier dynamics in QD-LEDs are comprehensively described by computer simulations. The charge-carrier injection is modelled by the carrier-capturing process, while the effect of electric fields at their interfaces is considered. The simulated electro-optical characteristics of QD-LEDs, such as the luminance, current density and external quantum efficiency (EQE) curves with varying voltages, show excellent agreement with experiments. Therefore, our computational method proposed here provides a useful means for designing and optimising high-performance QD-LED devices.https://doi.org/10.1038/s41524-021-00591-9 |
| spellingShingle | Sung-Min Jung Tae Hoon Lee Sang Yun Bang Soo Deok Han Dong-Wook Shin Sanghyo Lee Hyung Woo Choi Yo-Han Suh Xiang-Bing Fan Jeong-Wan Jo Shijie Zhan Jiajie Yang Chatura Samarakoon Yoonwoo Kim Luigi G. Occhipinti Gehan Amaratunga Jong Min Kim Modelling charge transport and electro-optical characteristics of quantum dot light-emitting diodes npj Computational Materials |
| title | Modelling charge transport and electro-optical characteristics of quantum dot light-emitting diodes |
| title_full | Modelling charge transport and electro-optical characteristics of quantum dot light-emitting diodes |
| title_fullStr | Modelling charge transport and electro-optical characteristics of quantum dot light-emitting diodes |
| title_full_unstemmed | Modelling charge transport and electro-optical characteristics of quantum dot light-emitting diodes |
| title_short | Modelling charge transport and electro-optical characteristics of quantum dot light-emitting diodes |
| title_sort | modelling charge transport and electro optical characteristics of quantum dot light emitting diodes |
| url | https://doi.org/10.1038/s41524-021-00591-9 |
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