Internal Quantum Efficiency of UV μLED Chips
| Autor: | Masahiro Kimura, Akihiro Kondo, Yoshihiko Muramoto |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Phosphor 02 engineering and technology medicine.disease_cause 01 natural sciences lcsh:Technology law.invention lcsh:Chemistry law 0103 physical sciences Display medicine General Materials Science Near ultraviolet Instrumentation lcsh:QH301-705.5 010302 applied physics Fluid Flow and Transfer Processes business.industry lcsh:T Process Chemistry and Technology General Engineering 021001 nanoscience & nanotechnology Chip lcsh:QC1-999 Computer Science Applications lcsh:Biology (General) lcsh:QD1-999 lcsh:TA1-2040 RGB color model Optoelectronics Quantum efficiency µLED 0210 nano-technology business Luminous efficacy lcsh:Engineering (General). Civil engineering (General) UV-LED µUV-LED Ultraviolet lcsh:Physics UV-RGB Light-emitting diode |
| Zdroj: | Applied Sciences Volume 9 Issue 3 Applied Sciences, Vol 9, Iss 3, p 450 (2019) |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app9030450 |
| Popis: | Micro light emitting diode (&mu LED) 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 &mu LED 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 &mu size. The UV &mu LED chip emitting at 385 nm exhibited a more linear output than a 400-nm purple &mu LED chip. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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