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Internal Quantum Efficiency of UV μLED Chips
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| Zeitschriftentitel: | Applied Sciences |
|---|---|
| Personen und Körperschaften: | , , |
| In: | Applied Sciences, 9, 2019, 3, S. 450 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
MDPI AG
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| Schlagwörter: |
| author_facet |
Muramoto, Yoshihiko Kimura, Masahiro Kondo, Akihiro Muramoto, Yoshihiko Kimura, Masahiro Kondo, Akihiro |
|---|---|
| author |
Muramoto, Yoshihiko Kimura, Masahiro Kondo, Akihiro |
| spellingShingle |
Muramoto, Yoshihiko Kimura, Masahiro Kondo, Akihiro Applied Sciences Internal Quantum Efficiency of UV μLED Chips Fluid Flow and Transfer Processes Computer Science Applications Process Chemistry and Technology General Engineering Instrumentation General Materials Science |
| author_sort |
muramoto, yoshihiko |
| spelling |
Muramoto, Yoshihiko Kimura, Masahiro Kondo, Akihiro 2076-3417 MDPI AG Fluid Flow and Transfer Processes Computer Science Applications Process Chemistry and Technology General Engineering Instrumentation General Materials Science http://dx.doi.org/10.3390/app9030450 <jats:p>Micro light emitting diode (μLED) displays have been in development since 2017, aimed for application in 2020. However, when using three-color, i.e., red, blue, and green LEDs, or blue LEDs that excite red and green phosphors, many challenges arise in mass production, cost, and quality. Our group has devised an ultraviolet (UV)-excited red, green, and blue (RGB) display that excites red, green, and blue phosphors using UV-LEDs. This paper studies how the composition and crystal defects of a light-emitting layer affect the luminous efficiency of a UV μLED chip from the perspective of internal quantum efficiency (IQE). It was confirmed that the luminous efficiency improves by making the LED chips in the near ultraviolet range μ-size. The UV μLED chip emitting at 385 nm exhibited a more linear output than a 400-nm purple μLED chip.</jats:p> Internal Quantum Efficiency of UV μLED Chips Applied Sciences |
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Applied Sciences |
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| title |
Internal Quantum Efficiency of UV μLED Chips |
| title_unstemmed |
Internal Quantum Efficiency of UV μLED Chips |
| title_full |
Internal Quantum Efficiency of UV μLED Chips |
| title_fullStr |
Internal Quantum Efficiency of UV μLED Chips |
| title_full_unstemmed |
Internal Quantum Efficiency of UV μLED Chips |
| title_short |
Internal Quantum Efficiency of UV μLED Chips |
| title_sort |
internal quantum efficiency of uv μled chips |
| topic |
Fluid Flow and Transfer Processes Computer Science Applications Process Chemistry and Technology General Engineering Instrumentation General Materials Science |
| url |
http://dx.doi.org/10.3390/app9030450 |
| publishDate |
2019 |
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450 |
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<jats:p>Micro light emitting diode (μLED) displays have been in development since 2017, aimed for application in 2020. However, when using three-color, i.e., red, blue, and green LEDs, or blue LEDs that excite red and green phosphors, many challenges arise in mass production, cost, and quality. Our group has devised an ultraviolet (UV)-excited red, green, and blue (RGB) display that excites red, green, and blue phosphors using UV-LEDs. This paper studies how the composition and crystal defects of a light-emitting layer affect the luminous efficiency of a UV μLED chip from the perspective of internal quantum efficiency (IQE). It was confirmed that the luminous efficiency improves by making the LED chips in the near ultraviolet range μ-size. The UV μLED chip emitting at 385 nm exhibited a more linear output than a 400-nm purple μLED chip.</jats:p> |
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| author | Muramoto, Yoshihiko, Kimura, Masahiro, Kondo, Akihiro |
| author_facet | Muramoto, Yoshihiko, Kimura, Masahiro, Kondo, Akihiro, Muramoto, Yoshihiko, Kimura, Masahiro, Kondo, Akihiro |
| author_sort | muramoto, yoshihiko |
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| description | <jats:p>Micro light emitting diode (μLED) displays have been in development since 2017, aimed for application in 2020. However, when using three-color, i.e., red, blue, and green LEDs, or blue LEDs that excite red and green phosphors, many challenges arise in mass production, cost, and quality. Our group has devised an ultraviolet (UV)-excited red, green, and blue (RGB) display that excites red, green, and blue phosphors using UV-LEDs. This paper studies how the composition and crystal defects of a light-emitting layer affect the luminous efficiency of a UV μLED chip from the perspective of internal quantum efficiency (IQE). It was confirmed that the luminous efficiency improves by making the LED chips in the near ultraviolet range μ-size. The UV μLED chip emitting at 385 nm exhibited a more linear output than a 400-nm purple μLED chip.</jats:p> |
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| physical | 450 |
| publishDate | 2019 |
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| series | Applied Sciences |
| source_id | 49 |
| spelling | Muramoto, Yoshihiko Kimura, Masahiro Kondo, Akihiro 2076-3417 MDPI AG Fluid Flow and Transfer Processes Computer Science Applications Process Chemistry and Technology General Engineering Instrumentation General Materials Science http://dx.doi.org/10.3390/app9030450 <jats:p>Micro light emitting diode (μLED) displays have been in development since 2017, aimed for application in 2020. However, when using three-color, i.e., red, blue, and green LEDs, or blue LEDs that excite red and green phosphors, many challenges arise in mass production, cost, and quality. Our group has devised an ultraviolet (UV)-excited red, green, and blue (RGB) display that excites red, green, and blue phosphors using UV-LEDs. This paper studies how the composition and crystal defects of a light-emitting layer affect the luminous efficiency of a UV μLED chip from the perspective of internal quantum efficiency (IQE). It was confirmed that the luminous efficiency improves by making the LED chips in the near ultraviolet range μ-size. The UV μLED chip emitting at 385 nm exhibited a more linear output than a 400-nm purple μLED chip.</jats:p> Internal Quantum Efficiency of UV μLED Chips Applied Sciences |
| spellingShingle | Muramoto, Yoshihiko, Kimura, Masahiro, Kondo, Akihiro, Applied Sciences, Internal Quantum Efficiency of UV μLED Chips, Fluid Flow and Transfer Processes, Computer Science Applications, Process Chemistry and Technology, General Engineering, Instrumentation, General Materials Science |
| title | Internal Quantum Efficiency of UV μLED Chips |
| title_full | Internal Quantum Efficiency of UV μLED Chips |
| title_fullStr | Internal Quantum Efficiency of UV μLED Chips |
| title_full_unstemmed | Internal Quantum Efficiency of UV μLED Chips |
| title_short | Internal Quantum Efficiency of UV μLED Chips |
| title_sort | internal quantum efficiency of uv μled chips |
| title_unstemmed | Internal Quantum Efficiency of UV μLED Chips |
| topic | Fluid Flow and Transfer Processes, Computer Science Applications, Process Chemistry and Technology, General Engineering, Instrumentation, General Materials Science |
| url | http://dx.doi.org/10.3390/app9030450 |