Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Concentric ring phosphor geometry on the luminous efficiency of white-light-emitting diodes with excellent color rendering property

Not Accessible

Your library or personal account may give you access

Abstract

This study presents a novel remote phosphor design involving a concentric ring remote phosphor layer in which green and red phosphors are separated. The green and red phosphor rings were separately illuminated by blue light emitted from the light-emitting diode (LED), causing low reabsorption in phosphor-converted LEDs (pcLEDs) using green and red phosphors. The experimental results revealed that the pcLEDs with green and red phosphors showed high color rendering, indicating that the LEDs are suitable for certain medical applications and architectural lighting. Moreover, for given green/red phosphor ratio and weights of the green and red phosphors, the output power and luminous flux of the pcLED with a concentric ring remote phosphor layer were greater than those of the pcLED with a mixed remote phosphor layer. The reduction in the reabsorption of green emission by red phosphor in pcLED with a concentric ring remote phosphor layer was responsible for the high luminous flux and indicated a high correlated color temperature of pcLED.

© 2016 Optical Society of America

Full Article  |  PDF Article
More Like This
Effect of phosphor geometry on the luminous efficiency of high-power white light-emitting diodes with excellent color rendering property

Yu-Ho Won, Ho Seong Jang, Kyoung Woo Cho, Yong Seon Song, Duk Young Jeon, and Ho Ki Kwon
Opt. Lett. 34(1) 1-3 (2009)

Simultaneously improve the luminous efficiency and color-rendering index of GaN-based white-light-emitting diodes using metal localized surface plasmon resonance

Rongqiao Wan, Shuo Zhang, Zhiqiang Liu, Xiaoyan Yi, Liancheng Wang, Junxi Wang, Junhui Li, Wenhui Zhu, and Jinmin Li
Opt. Lett. 44(17) 4155-4158 (2019)

Excellent color rendering index and high quantum efficiency of rare-earth-free fluosilicate glass for single-phase white light phosphor

Ye Yuan, Ruilin Zheng, Qiang Lu, Weitao Zhang, Jiajin Zheng, and Wei Wei
Opt. Lett. 41(13) 3122-3125 (2016)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved