Efficient quantum dot light emitting diodes for solid state lighting and displays
Quantum dot-based light-emitting diodes (QLEDs) with advantages in colour quality, stability and cost-effectiveness are emerging as a candidate for single-material, full colour light sources. The focus of this study is to solve some challenging problems that hinder the ultimate research transformati...
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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2014
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| Online Access: | https://hdl.handle.net/10356/61730 |
| _version_ | 1824454702984593408 |
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| author | Yang, Xuyong |
| author2 | Sun Xiaowei |
| author_facet | Sun Xiaowei Yang, Xuyong |
| author_sort | Yang, Xuyong |
| collection | NTU |
| description | Quantum dot-based light-emitting diodes (QLEDs) with advantages in colour quality, stability and cost-effectiveness are emerging as a candidate for single-material, full colour light sources. The focus of this study is to solve some challenging problems that hinder the ultimate research transformation and commercialization of the QLED technology. Our light out-coupling strategy enhanced device efficiency up to 9.34%, the record high value for green QLEDs. The substitution of organic charge transport layers with metal oxide nanoparticles significantly improved the operating lifetime of QLEDs by a factor of 20. Our development of the narrowest-linewidth, high-quality InP-based QDs with wavelength tunability across full visible spectrum solved the toxicity problem of QDs effectively. The use of Kapton tape and metal electrodes in top-emitting LED architecture made a significant breakthrough in flexible QLED performance with the best efficiency of 4.03%. Our study reported in this thesis contributed to the fast development of the QLEDs. |
| first_indexed | 2025-02-19T03:26:31Z |
| format | Thesis |
| id | ntu-10356/61730 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:26:31Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | ntu-10356/617302023-07-04T16:28:01Z Efficient quantum dot light emitting diodes for solid state lighting and displays Yang, Xuyong Sun Xiaowei School of Electrical and Electronic Engineering Hilmi Volkan Demir DRNTU::Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics DRNTU::Engineering::Electrical and electronic engineering::Nanoelectronics DRNTU::Engineering::Electrical and electronic engineering::Semiconductors DRNTU::Engineering::Materials::Nanostructured materials Quantum dot-based light-emitting diodes (QLEDs) with advantages in colour quality, stability and cost-effectiveness are emerging as a candidate for single-material, full colour light sources. The focus of this study is to solve some challenging problems that hinder the ultimate research transformation and commercialization of the QLED technology. Our light out-coupling strategy enhanced device efficiency up to 9.34%, the record high value for green QLEDs. The substitution of organic charge transport layers with metal oxide nanoparticles significantly improved the operating lifetime of QLEDs by a factor of 20. Our development of the narrowest-linewidth, high-quality InP-based QDs with wavelength tunability across full visible spectrum solved the toxicity problem of QDs effectively. The use of Kapton tape and metal electrodes in top-emitting LED architecture made a significant breakthrough in flexible QLED performance with the best efficiency of 4.03%. Our study reported in this thesis contributed to the fast development of the QLEDs. DOCTOR OF PHILOSOPHY (EEE) 2014-08-29T08:11:23Z 2014-08-29T08:11:23Z 2014 2014 Thesis Yang, X. (2014). Efficient quantum dot light emitting diodes for solid state lighting and displays. Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/61730 10.32657/10356/61730 en 155 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics DRNTU::Engineering::Electrical and electronic engineering::Nanoelectronics DRNTU::Engineering::Electrical and electronic engineering::Semiconductors DRNTU::Engineering::Materials::Nanostructured materials Yang, Xuyong Efficient quantum dot light emitting diodes for solid state lighting and displays |
| title | Efficient quantum dot light emitting diodes for solid state lighting and displays |
| title_full | Efficient quantum dot light emitting diodes for solid state lighting and displays |
| title_fullStr | Efficient quantum dot light emitting diodes for solid state lighting and displays |
| title_full_unstemmed | Efficient quantum dot light emitting diodes for solid state lighting and displays |
| title_short | Efficient quantum dot light emitting diodes for solid state lighting and displays |
| title_sort | efficient quantum dot light emitting diodes for solid state lighting and displays |
| topic | DRNTU::Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics DRNTU::Engineering::Electrical and electronic engineering::Nanoelectronics DRNTU::Engineering::Electrical and electronic engineering::Semiconductors DRNTU::Engineering::Materials::Nanostructured materials |
| url | https://hdl.handle.net/10356/61730 |
| work_keys_str_mv | AT yangxuyong efficientquantumdotlightemittingdiodesforsolidstatelightinganddisplays |