Internal quantum efficiency and tunable colour temperature in monolithic white InGaN/GaN LED

Titkov, Ilya E.; Yadav, Amit; Zerova, Vera L.; Zulonas, Modestas; Tsatsulnikov, Andrey F.; Lundin, Wsevolod V.; Sakharov, Alexey V. and Rafailov, Edik U. Internal quantum efficiency and tunable colour temperature in monolithic white InGaN/GaN LED. IN: Gallium nitride materials and devices IX. Chyi, Jen-Inn; Nanishi, Yasushi; Morkoç, Hadis; Piprek, Joachim; Yoon, Euijoon and Fujioka, Hiroshi (eds) SPIE proceedings . Bellingham, WA (US): SPIE.

Abstract

Internal Quantum Efficiency (IQE) of two-colour monolithic white light emitting diode (LED) was measured by temperature dependant electro-luminescence (TDEL) and analysed with modified rate equation based on ABC model. External, internal and injection efficiencies of blue and green quantum wells were analysed separately. Monolithic white LED contained one green InGaN QW and two blue QWs being separated by GaN barrier. This paper reports also the tunable behaviour of correlated colour temperature (CCT) in pulsed operation mode and effect of self-heating on device performance.

Publication DOI: https://doi.org/10.1117/12.2040086
Divisions: Engineering & Applied Sciences > Institute of Photonics
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Additional Information: Ilya E. Titkov ; Amit Yadav ; Vera L. Zerova ; Modestas Zulonas ; Andrey F. Tsatsulnikov ; Wsevolod V. Lundin ; Alexey V. Sakharov and Edik U. Rafailov, "Internal quantum efficiency and tunable colour temperature in monolithic white InGaN/GaN LED", Proc. SPIE 8986, Gallium Nitride Materials and Devices IX, 89862A (March 8, 2014). Copyright 2014 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. DOI: http://dx.doi.org/10.1117/12.2040086 Funding: European Union FP7, NEWLED project, Grant number 318388
Event Title: Gallium nitride materials and devices IX
Event Type: Other
Event Dates: 2014-02-03 - 2014-02-06
Uncontrolled Keywords: internal quantum efficiency,monolithic white LED,tunable CCT,Applied Mathematics,Computer Science Applications,Electrical and Electronic Engineering,Electronic, Optical and Magnetic Materials,Condensed Matter Physics

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