Size-Dependent Quantum Efficiency of Flip-Chip Light-Emitting Diodes at High Current Injection Conditions
Versatile applications call for InGaN-based light-emitting diodes (LEDs) to operate at ultra-high current densities with high quantum efficiency. In this work, we investigated the size-dependent effects of the electrical and optical performance of LEDs as increasing the current density up to 100 A/c...
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| Format: | Article |
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MDPI AG
2021-03-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/8/4/88 |
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| author | Xingfei Zhang Yan Li Zhicong Li Zhenlin Miao Meng Liang Yiyun Zhang Xiaoyan Yi Guohong Wang Jinmin Li |
| author_facet | Xingfei Zhang Yan Li Zhicong Li Zhenlin Miao Meng Liang Yiyun Zhang Xiaoyan Yi Guohong Wang Jinmin Li |
| author_sort | Xingfei Zhang |
| collection | DOAJ |
| description | Versatile applications call for InGaN-based light-emitting diodes (LEDs) to operate at ultra-high current densities with high quantum efficiency. In this work, we investigated the size-dependent effects of the electrical and optical performance of LEDs as increasing the current density up to 100 A/cm<sup>2</sup>, which demonstrated that mini-strip flip-chip LEDs were superior option to achieve better performance. In detail, at a current density of 100 A/cm<sup>2</sup>, the light output power density of these mini-strip LEDs was improved by about 6.1 W/cm<sup>2</sup>, leading to an improvement in the wall-plug efficiency by 4.23%, while the operating temperature was reduced by 11.3 °C, as compared with the large-sized LEDs. This could be attributed to the increase in the sidewall light extraction, alleviated current crowding effect, and improved heat dissipation. This work suggests an array of mini-strip LEDs would provide an option in achieving higher luminescent efficiency at ultrahigh current injection conditions for various applications. |
| first_indexed | 2024-03-10T12:57:13Z |
| format | Article |
| id | doaj.art-9017e1df9d764fa7b50243d52c9626af |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-10T12:57:13Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-9017e1df9d764fa7b50243d52c9626af2023-11-21T11:49:31ZengMDPI AGPhotonics2304-67322021-03-01848810.3390/photonics8040088Size-Dependent Quantum Efficiency of Flip-Chip Light-Emitting Diodes at High Current Injection ConditionsXingfei Zhang0Yan Li1Zhicong Li2Zhenlin Miao3Meng Liang4Yiyun Zhang5Xiaoyan Yi6Guohong Wang7Jinmin Li8R&D Center for Solid-State Lighting, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaR&D Center for Solid-State Lighting, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaR&D Center for Solid-State Lighting, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaHualei Optoelectronic, Chenzhou 423000, ChinaR&D Center for Solid-State Lighting, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaR&D Center for Solid-State Lighting, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaR&D Center for Solid-State Lighting, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaR&D Center for Solid-State Lighting, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaR&D Center for Solid-State Lighting, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaVersatile applications call for InGaN-based light-emitting diodes (LEDs) to operate at ultra-high current densities with high quantum efficiency. In this work, we investigated the size-dependent effects of the electrical and optical performance of LEDs as increasing the current density up to 100 A/cm<sup>2</sup>, which demonstrated that mini-strip flip-chip LEDs were superior option to achieve better performance. In detail, at a current density of 100 A/cm<sup>2</sup>, the light output power density of these mini-strip LEDs was improved by about 6.1 W/cm<sup>2</sup>, leading to an improvement in the wall-plug efficiency by 4.23%, while the operating temperature was reduced by 11.3 °C, as compared with the large-sized LEDs. This could be attributed to the increase in the sidewall light extraction, alleviated current crowding effect, and improved heat dissipation. This work suggests an array of mini-strip LEDs would provide an option in achieving higher luminescent efficiency at ultrahigh current injection conditions for various applications.https://www.mdpi.com/2304-6732/8/4/88light-emitting diodes (LEDs)ultra-high current densitiessize-dependent |
| spellingShingle | Xingfei Zhang Yan Li Zhicong Li Zhenlin Miao Meng Liang Yiyun Zhang Xiaoyan Yi Guohong Wang Jinmin Li Size-Dependent Quantum Efficiency of Flip-Chip Light-Emitting Diodes at High Current Injection Conditions Photonics light-emitting diodes (LEDs) ultra-high current densities size-dependent |
| title | Size-Dependent Quantum Efficiency of Flip-Chip Light-Emitting Diodes at High Current Injection Conditions |
| title_full | Size-Dependent Quantum Efficiency of Flip-Chip Light-Emitting Diodes at High Current Injection Conditions |
| title_fullStr | Size-Dependent Quantum Efficiency of Flip-Chip Light-Emitting Diodes at High Current Injection Conditions |
| title_full_unstemmed | Size-Dependent Quantum Efficiency of Flip-Chip Light-Emitting Diodes at High Current Injection Conditions |
| title_short | Size-Dependent Quantum Efficiency of Flip-Chip Light-Emitting Diodes at High Current Injection Conditions |
| title_sort | size dependent quantum efficiency of flip chip light emitting diodes at high current injection conditions |
| topic | light-emitting diodes (LEDs) ultra-high current densities size-dependent |
| url | https://www.mdpi.com/2304-6732/8/4/88 |
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