Enhanced external quantum efficiency in GaN-based vertical-type light-emitting diodes by localized surface plasmons

Yung Chi Yao; Jung Min Hwang; Zu Po Yang; Jing Yu Haung; Chia Ching Lin; Wei Chen Shen; Chun Yang Chou; Mei Tan Wang; Chun Ying Huang; Ching Yu Chen; Meng Tsan Tsai; Tzu Neng Lin; Ji Lin Shen; Ya Ju Lee

doi:10.1038/srep22659

Enhanced external quantum efficiency in GaN-based vertical-type light-emitting diodes by localized surface plasmons

Yung Chi Yao, Jung Min Hwang, Zu Po Yang, Jing Yu Haung, Chia Ching Lin, Wei Chen Shen, Chun Yang Chou, Mei Tan Wang, Chun Ying Huang, Ching Yu Chen, Meng Tsan Tsai, Tzu Neng Lin, Ji Lin Shen, Ya Ju Lee^*

^*此作品的通信作者

光電工程研究所

研究成果: 雜誌貢獻 › 期刊論文 › 同行評審

53 引文斯高帕斯（Scopus）

摘要

Enhancement of the external quantum efficiency of a GaN-based vertical-type light emitting diode (VLED) through the coupling of localized surface plasmon (LSP) resonance with the wave-guided mode light is studied. To achieve this experimentally, Ag nanoparticles (NPs), as the LSP resonant source, are drop-casted on the most top layer of waveguide channel, which is composed of hydrothermally synthesized ZnO nanorods capped on the top of GaN-based VLED. Enhanced light-output power and external quantum efficiency are observed, and the amount of enhancement remains steady with the increase of the injected currents. To understand the observations theoretically, the absorption spectra and the electric field distributions of the VLED with and without Ag NPs decorated on ZnO NRs are determined using the finite-difference time-domain (FDTD) method. The results prove that the observation of enhancement of the external quantum efficiency can be attributed to the creation of an extra escape channel for trapped light due to the coupling of the LSP with wave-guided mode light, by which the energy of wave-guided mode light can be transferred to the efficient light scattering center of the LSP.

原文	英語
文章編號	22659
期刊	Scientific reports
卷	6
DOIs	https://doi.org/10.1038/srep22659
出版狀態	已發佈 - 2016 3月 3

ASJC Scopus subject areas

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10.1038/srep22659

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Yao, Y. C., Hwang, J. M., Yang, Z. P., Haung, J. Y., Lin, C. C., Shen, W. C., Chou, C. Y., Wang, M. T., Huang, C. Y., Chen, C. Y., Tsai, M. T., Lin, T. N., Shen, J. L., & Lee, Y. J. (2016). Enhanced external quantum efficiency in GaN-based vertical-type light-emitting diodes by localized surface plasmons. Scientific reports, 6, 文章 22659. https://doi.org/10.1038/srep22659

@article{dea0a3eb4c2746c9a0836a625f4cfa82,

title = "Enhanced external quantum efficiency in GaN-based vertical-type light-emitting diodes by localized surface plasmons",

abstract = "Enhancement of the external quantum efficiency of a GaN-based vertical-type light emitting diode (VLED) through the coupling of localized surface plasmon (LSP) resonance with the wave-guided mode light is studied. To achieve this experimentally, Ag nanoparticles (NPs), as the LSP resonant source, are drop-casted on the most top layer of waveguide channel, which is composed of hydrothermally synthesized ZnO nanorods capped on the top of GaN-based VLED. Enhanced light-output power and external quantum efficiency are observed, and the amount of enhancement remains steady with the increase of the injected currents. To understand the observations theoretically, the absorption spectra and the electric field distributions of the VLED with and without Ag NPs decorated on ZnO NRs are determined using the finite-difference time-domain (FDTD) method. The results prove that the observation of enhancement of the external quantum efficiency can be attributed to the creation of an extra escape channel for trapped light due to the coupling of the LSP with wave-guided mode light, by which the energy of wave-guided mode light can be transferred to the efficient light scattering center of the LSP.",

author = "Yao, {Yung Chi} and Hwang, {Jung Min} and Yang, {Zu Po} and Haung, {Jing Yu} and Lin, {Chia Ching} and Shen, {Wei Chen} and Chou, {Chun Yang} and Wang, {Mei Tan} and Huang, {Chun Ying} and Chen, {Ching Yu} and Tsai, {Meng Tsan} and Lin, {Tzu Neng} and Shen, {Ji Lin} and Lee, {Ya Ju}",

note = "Funding Information: The authors gratefully acknowledge financial support from the Ministry of Science and Technology in Taiwan (contract Nos. MOST 103–2112–M–003–008–MY3, MOST 104–2622–M–003–001–CC2, and MOST 104–2221– E–009–167). The authors would like to thank Mses. Su-Jen Ji and Chia-Ying Chien, and Prof. Chun-Hsien Chen of National Taiwan University for technical support in SEM experiments and fruitful discussions.",

year = "2016",

month = mar,

day = "3",

doi = "10.1038/srep22659",

language = "English",

volume = "6",

journal = "Scientific reports",

issn = "2045-2322",

publisher = "Nature Publishing Group",

}

TY - JOUR

T1 - Enhanced external quantum efficiency in GaN-based vertical-type light-emitting diodes by localized surface plasmons

AU - Yao, Yung Chi

AU - Hwang, Jung Min

AU - Yang, Zu Po

AU - Haung, Jing Yu

AU - Lin, Chia Ching

AU - Shen, Wei Chen

AU - Chou, Chun Yang

AU - Wang, Mei Tan

AU - Huang, Chun Ying

AU - Chen, Ching Yu

AU - Tsai, Meng Tsan

AU - Lin, Tzu Neng

AU - Shen, Ji Lin

AU - Lee, Ya Ju

N1 - Funding Information: The authors gratefully acknowledge financial support from the Ministry of Science and Technology in Taiwan (contract Nos. MOST 103–2112–M–003–008–MY3, MOST 104–2622–M–003–001–CC2, and MOST 104–2221– E–009–167). The authors would like to thank Mses. Su-Jen Ji and Chia-Ying Chien, and Prof. Chun-Hsien Chen of National Taiwan University for technical support in SEM experiments and fruitful discussions.

PY - 2016/3/3

Y1 - 2016/3/3

N2 - Enhancement of the external quantum efficiency of a GaN-based vertical-type light emitting diode (VLED) through the coupling of localized surface plasmon (LSP) resonance with the wave-guided mode light is studied. To achieve this experimentally, Ag nanoparticles (NPs), as the LSP resonant source, are drop-casted on the most top layer of waveguide channel, which is composed of hydrothermally synthesized ZnO nanorods capped on the top of GaN-based VLED. Enhanced light-output power and external quantum efficiency are observed, and the amount of enhancement remains steady with the increase of the injected currents. To understand the observations theoretically, the absorption spectra and the electric field distributions of the VLED with and without Ag NPs decorated on ZnO NRs are determined using the finite-difference time-domain (FDTD) method. The results prove that the observation of enhancement of the external quantum efficiency can be attributed to the creation of an extra escape channel for trapped light due to the coupling of the LSP with wave-guided mode light, by which the energy of wave-guided mode light can be transferred to the efficient light scattering center of the LSP.

AB - Enhancement of the external quantum efficiency of a GaN-based vertical-type light emitting diode (VLED) through the coupling of localized surface plasmon (LSP) resonance with the wave-guided mode light is studied. To achieve this experimentally, Ag nanoparticles (NPs), as the LSP resonant source, are drop-casted on the most top layer of waveguide channel, which is composed of hydrothermally synthesized ZnO nanorods capped on the top of GaN-based VLED. Enhanced light-output power and external quantum efficiency are observed, and the amount of enhancement remains steady with the increase of the injected currents. To understand the observations theoretically, the absorption spectra and the electric field distributions of the VLED with and without Ag NPs decorated on ZnO NRs are determined using the finite-difference time-domain (FDTD) method. The results prove that the observation of enhancement of the external quantum efficiency can be attributed to the creation of an extra escape channel for trapped light due to the coupling of the LSP with wave-guided mode light, by which the energy of wave-guided mode light can be transferred to the efficient light scattering center of the LSP.

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Enhanced external quantum efficiency in GaN-based vertical-type light-emitting diodes by localized surface plasmons

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