Enhanced Performance of GaN-based Ultraviolet Light Emitting Diodes by Photon Recycling Using Graphene Quantum Dots
Abstract Graphene quantum dots (GQDs) with an average diameter of 3.5 nm were prepared via pulsed laser ablation. The synthesized GQDs can improve the optical and electrical properties of InGaN/InAlGaN UV light emitting diodes (LEDs) remarkably. An enhancement of electroluminescence and a decrease o...
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Nature Portfolio
2017
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oai:doaj.org-article:84637e9ed34047bf8788a2fa478907142021-12-02T12:32:46ZEnhanced Performance of GaN-based Ultraviolet Light Emitting Diodes by Photon Recycling Using Graphene Quantum Dots10.1038/s41598-017-07483-32045-2322https://doaj.org/article/84637e9ed34047bf8788a2fa478907142017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-07483-3https://doaj.org/toc/2045-2322Abstract Graphene quantum dots (GQDs) with an average diameter of 3.5 nm were prepared via pulsed laser ablation. The synthesized GQDs can improve the optical and electrical properties of InGaN/InAlGaN UV light emitting diodes (LEDs) remarkably. An enhancement of electroluminescence and a decrease of series resistance of LEDs were observed after incorporation of GQDs on the LED surface. As the GQD concentration is increased, the emitted light (series resistance) in the LED increases (decreases) accordingly. The light output power achieved a maximum increase as high as 71% after introducing GQDs with the concentration of 0.9 mg/ml. The improved performance of LEDs after the introduction of GQDs is explained by the photon recycling through the light extraction from the waveguide mode and the carrier transfer from GQDs to the active layer.Tzu-Neng LinSvette Reina Merden SantiagoChi-Tsu YuanKuo-Pin ChiuJi-Lin ShenTing-Chun WangHao-Chung KuoChing-Hsueh ChiuYung-Chi YaoYa-Ju LeeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017) |
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Medicine R Science Q |
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Medicine R Science Q Tzu-Neng Lin Svette Reina Merden Santiago Chi-Tsu Yuan Kuo-Pin Chiu Ji-Lin Shen Ting-Chun Wang Hao-Chung Kuo Ching-Hsueh Chiu Yung-Chi Yao Ya-Ju Lee Enhanced Performance of GaN-based Ultraviolet Light Emitting Diodes by Photon Recycling Using Graphene Quantum Dots |
| description |
Abstract Graphene quantum dots (GQDs) with an average diameter of 3.5 nm were prepared via pulsed laser ablation. The synthesized GQDs can improve the optical and electrical properties of InGaN/InAlGaN UV light emitting diodes (LEDs) remarkably. An enhancement of electroluminescence and a decrease of series resistance of LEDs were observed after incorporation of GQDs on the LED surface. As the GQD concentration is increased, the emitted light (series resistance) in the LED increases (decreases) accordingly. The light output power achieved a maximum increase as high as 71% after introducing GQDs with the concentration of 0.9 mg/ml. The improved performance of LEDs after the introduction of GQDs is explained by the photon recycling through the light extraction from the waveguide mode and the carrier transfer from GQDs to the active layer. |
| format |
article |
| author |
Tzu-Neng Lin Svette Reina Merden Santiago Chi-Tsu Yuan Kuo-Pin Chiu Ji-Lin Shen Ting-Chun Wang Hao-Chung Kuo Ching-Hsueh Chiu Yung-Chi Yao Ya-Ju Lee |
| author_facet |
Tzu-Neng Lin Svette Reina Merden Santiago Chi-Tsu Yuan Kuo-Pin Chiu Ji-Lin Shen Ting-Chun Wang Hao-Chung Kuo Ching-Hsueh Chiu Yung-Chi Yao Ya-Ju Lee |
| author_sort |
Tzu-Neng Lin |
| title |
Enhanced Performance of GaN-based Ultraviolet Light Emitting Diodes by Photon Recycling Using Graphene Quantum Dots |
| title_short |
Enhanced Performance of GaN-based Ultraviolet Light Emitting Diodes by Photon Recycling Using Graphene Quantum Dots |
| title_full |
Enhanced Performance of GaN-based Ultraviolet Light Emitting Diodes by Photon Recycling Using Graphene Quantum Dots |
| title_fullStr |
Enhanced Performance of GaN-based Ultraviolet Light Emitting Diodes by Photon Recycling Using Graphene Quantum Dots |
| title_full_unstemmed |
Enhanced Performance of GaN-based Ultraviolet Light Emitting Diodes by Photon Recycling Using Graphene Quantum Dots |
| title_sort |
enhanced performance of gan-based ultraviolet light emitting diodes by photon recycling using graphene quantum dots |
| publisher |
Nature Portfolio |
| publishDate |
2017 |
| url |
https://doaj.org/article/84637e9ed34047bf8788a2fa47890714 |
| work_keys_str_mv |
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