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Emission spectrum control in monolithic blue-cyan dichromatic light-emitting diodes.
- Source :
- Semiconductor Science & Technology; Apr2020, Vol. 35 Issue 4, p1-7, 7p
- Publication Year :
- 2020
-
Abstract
- InGaN-based dichromatic light emitting diodes (LEDs) emitting in the blue and cyan spectral ranges simultaneously, are investigated both experimentally and theoretically. Two main approaches to controlling the ratio of blue-to-cyan components in the emission spectrum are suggested and analyzed: (i) thickness variation of the GaN barrier between the blue and cyan quantum wells and (ii) optimization of the barrier doping with n- or p-type impurities. Detailed examination of the approaches is carried out in order to understand their capabilities for intentional variation of the blue-to-cyan ratio in a wide range. Based on numerical simulations, a novel mechanism, invoking enhanced Shockley–Read–Hall recombination in the barrier and underlying both approaches, is suggested and discussed. It is shown that proposed design of the monolithic blue-cyan LEDs does not result in substantial decrease of the LED emission efficiency compared to monochromatic blue or cyan reference samples. [ABSTRACT FROM AUTHOR]
- Subjects :
- MOLECULAR spectra
EMISSION control
LIGHT emitting diodes
QUANTUM wells
Subjects
Details
- Language :
- English
- ISSN :
- 02681242
- Volume :
- 35
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Semiconductor Science & Technology
- Publication Type :
- Academic Journal
- Accession number :
- 144665644
- Full Text :
- https://doi.org/10.1088/1361-6641/ab74ef