High-Efficiency UV LEDs using Quaternary InAlGaN
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- Hirayama Hideki
- RIKEN(The Institute of Physical and Chemical Research)
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- Kyono Takashi
- Sumitomo Electric Industries Ltd. Semiconductor R&D Laboratories
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- Akita Katsushi
- Sumitomo Electric Industries Ltd. Semiconductor R&D Laboratories
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- Nakamura Takao
- Sumitomo Electric Industries Ltd. Semiconductor R&D Laboratories
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- Ishibashi Koji
- RIKEN(The Institute of Physical and Chemical Research)
Bibliographic Information
- Other Title
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- 窒化物4元混晶を用いた高効率紫外LED
- チッカブツ 4ゲンコンショウ オ モチイタ コウコウリツ シガイ LED
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Abstract
High-efficiency ultraviolet (UV) light sources are very attractive for application to white lighting, high-density memories, medical fields, etc. We have demonstrated that 300-370 nm UV emission is considerably enhanced by the introduction of several percent of In into AlGaN due to an In-segregation effect. We fabricated 310 nm band UV LEDs with quaternary InAlGaN emitting layers on sapphire substrate and obtained sub-milliwatt output power. We also fabricated 350 nm band InAlGaN-based quantum-well (QW) LEDs on GaN substrates in order to eliminate the effects of threading dislocations. The maximum UV output power obtained was as high as 7.4 mW under room temperature (RT) CW operation. The maximum external quantum efficiency (EQE) was 1.1% with an injection current of 50 mA, which is the highest EQE ever obtained for 350 nm band UV LEDs with top-emission geometry.
Journal
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- IEEJ Transactions on Electronics, Information and Systems
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IEEJ Transactions on Electronics, Information and Systems 125 (2), 225-232, 2005
The Institute of Electrical Engineers of Japan
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Details 詳細情報について
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- CRID
- 1390282679580651776
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- NII Article ID
- 10014301981
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- NII Book ID
- AN10065950
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- ISSN
- 13488155
- 03854221
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- NDL BIB ID
- 7236336
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed