Author:
Andriichuk V.A., ,Nakonechnyi M.S.,Filiuk Ya.O., ,
Abstract
The results of experimental investigations of the glow kinetics of narrow-spectrum LEDs based on InGaN-GaN 450 and 520 nm and AlGaInP-GaAs 625 nm structures are presented. The increase and decrease of the light flux intensity under pulsed power are described by exponential dependences containing fast and slow components. The time constants of both components decrease with the increase of the pulse frequency for all three types of LED samples. The time constant of the slow component decreases with the increase of the current and voltage pulse amplitudes. The maximum light output on the frequency dependences of LED energy characteristics is observed at the frequency of 75…100 kHz. Further frequency increase results in the decrease of the LED energy efficiency. The obtained results are explained based on the LED equivalent electrical and energy circuits.
Publisher
National Academy of Sciences of Ukraine (Co. LTD Ukrinformnauka) (Publications)
Subject
Electrical and Electronic Engineering,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials
Reference13 articles.
1. 1. Narendran N., Gu Y., Freyssinier J.P. et al. Solid-state lighting: failure analysis of white LEDs. J. Cryst. Growth. 2004. 268, No 3-4. P. 449-456.
2. 2. Baumgartner H. Metrology for III-V optosemiconductors, Dissertation. Espoo: Aalto University, 2017. 3. Hegedüs J., Hantos G., Poppe A. Lifetime modelling issues of power light emitting diodes. Energies. 2020. 13, No 13. Р. 3370.
3. 4. Aeloiza E., Kim J.-H., Enjeti P., Ruminot P. A real time method to estimate electrolytic capacitor condition in PWM adjustable speed drives and uninterruptible power supplies. 2005 IEEE 36th Power Electronics Specialists Conference, Dresden, Germany, 2005. P. 2867-2872.
4. 5. Catelani M., Ciani L., Singuaroli R., Mannucci A. Electrolytic capacitor lifetime prediction in ground mobile applications. 13th IMEKO TC10 Workshop on Technical Diagnostics. June 26-27, 2014, Warsaw, Poland. Р. 184-188.
5. 6. Pekur D.V., Sorokin V.M., Nikolaenko Yu.E. et al. Determination of optical parameters in quasi- monochromatic LEDs for implementation of lighting systems with tunable correlated color temperature. SPQEO. 2022. 25, No 3. P. 303-314.
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献