Enhancement of the luminous efficiency of a ceramic phosphor plate by post-annealing for high-power LED applications

In Jae Lee, Young Gyun Kim, Vijayakumar Elayappan, Jimin Kim, Kihyun Kim, Hyun Sung Noh, Haigun Lee

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Currently, phosphor-converted white light-emitting diodes offer low energy consumption, good environmental stability, and a long lifetime. Hence, they are widely utilized in high-power light-emitting diode (LED) applications such as those in the automotive headlamp industries. However, obtaining high luminous efficiency of such diodes is challenging because of their internal structural properties such as micropores. Herein, we developed phosphor-in-glass (PiG) plates by mixing a blue LED chip and yellow phosphor to create high-power white LEDs (w-LEDs). In addition, the influence of post-annealing on the prepared PiG plates at different temperatures (350°C-550 °C) was investigated. Post-annealing, a treatment that facilitates the mobility of the ceramic matrix encapsulating the phosphor powder, decreases an LED's porosity, thereby enhancing its overall luminous efficiency. Results show that PiG plates post-annealed at 450 °C exhibit superior optical performance and effective color properties than PiG plates that were non-annealed or post-annealed at 350 °C, 400 °C, 500 °C, and 550 °C. Therefore, post-annealed PiG plates are more suitable potential materials for application in the high-power LED industry.

Original languageEnglish
Pages (from-to)3113-3118
Number of pages6
JournalCeramics International
Volume46
Issue number3
DOIs
Publication statusPublished - 2020 Feb 15

Keywords

  • Automotive headlamp
  • High-power LED
  • Luminous efficiency
  • PiG plates
  • Post-annealing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Enhancement of the luminous efficiency of a ceramic phosphor plate by post-annealing for high-power LED applications. / Lee, In Jae; Kim, Young Gyun; Elayappan, Vijayakumar; Kim, Jimin; Kim, Kihyun; Noh, Hyun Sung; Lee, Haigun.

In: Ceramics International, Vol. 46, No. 3, 15.02.2020, p. 3113-3118.

Research output: Contribution to journalArticle

Lee, In Jae ; Kim, Young Gyun ; Elayappan, Vijayakumar ; Kim, Jimin ; Kim, Kihyun ; Noh, Hyun Sung ; Lee, Haigun. / Enhancement of the luminous efficiency of a ceramic phosphor plate by post-annealing for high-power LED applications. In: Ceramics International. 2020 ; Vol. 46, No. 3. pp. 3113-3118.
@article{a6476a03a31e4e2ab8b862329371131f,
title = "Enhancement of the luminous efficiency of a ceramic phosphor plate by post-annealing for high-power LED applications",
abstract = "Currently, phosphor-converted white light-emitting diodes offer low energy consumption, good environmental stability, and a long lifetime. Hence, they are widely utilized in high-power light-emitting diode (LED) applications such as those in the automotive headlamp industries. However, obtaining high luminous efficiency of such diodes is challenging because of their internal structural properties such as micropores. Herein, we developed phosphor-in-glass (PiG) plates by mixing a blue LED chip and yellow phosphor to create high-power white LEDs (w-LEDs). In addition, the influence of post-annealing on the prepared PiG plates at different temperatures (350°C-550 °C) was investigated. Post-annealing, a treatment that facilitates the mobility of the ceramic matrix encapsulating the phosphor powder, decreases an LED's porosity, thereby enhancing its overall luminous efficiency. Results show that PiG plates post-annealed at 450 °C exhibit superior optical performance and effective color properties than PiG plates that were non-annealed or post-annealed at 350 °C, 400 °C, 500 °C, and 550 °C. Therefore, post-annealed PiG plates are more suitable potential materials for application in the high-power LED industry.",
keywords = "Automotive headlamp, High-power LED, Luminous efficiency, PiG plates, Post-annealing",
author = "Lee, {In Jae} and Kim, {Young Gyun} and Vijayakumar Elayappan and Jimin Kim and Kihyun Kim and Noh, {Hyun Sung} and Haigun Lee",
year = "2020",
month = "2",
day = "15",
doi = "10.1016/j.ceramint.2019.10.013",
language = "English",
volume = "46",
pages = "3113--3118",
journal = "Ceramics International",
issn = "0272-8842",
publisher = "Elsevier Limited",
number = "3",

}

TY - JOUR

T1 - Enhancement of the luminous efficiency of a ceramic phosphor plate by post-annealing for high-power LED applications

AU - Lee, In Jae

AU - Kim, Young Gyun

AU - Elayappan, Vijayakumar

AU - Kim, Jimin

AU - Kim, Kihyun

AU - Noh, Hyun Sung

AU - Lee, Haigun

PY - 2020/2/15

Y1 - 2020/2/15

N2 - Currently, phosphor-converted white light-emitting diodes offer low energy consumption, good environmental stability, and a long lifetime. Hence, they are widely utilized in high-power light-emitting diode (LED) applications such as those in the automotive headlamp industries. However, obtaining high luminous efficiency of such diodes is challenging because of their internal structural properties such as micropores. Herein, we developed phosphor-in-glass (PiG) plates by mixing a blue LED chip and yellow phosphor to create high-power white LEDs (w-LEDs). In addition, the influence of post-annealing on the prepared PiG plates at different temperatures (350°C-550 °C) was investigated. Post-annealing, a treatment that facilitates the mobility of the ceramic matrix encapsulating the phosphor powder, decreases an LED's porosity, thereby enhancing its overall luminous efficiency. Results show that PiG plates post-annealed at 450 °C exhibit superior optical performance and effective color properties than PiG plates that were non-annealed or post-annealed at 350 °C, 400 °C, 500 °C, and 550 °C. Therefore, post-annealed PiG plates are more suitable potential materials for application in the high-power LED industry.

AB - Currently, phosphor-converted white light-emitting diodes offer low energy consumption, good environmental stability, and a long lifetime. Hence, they are widely utilized in high-power light-emitting diode (LED) applications such as those in the automotive headlamp industries. However, obtaining high luminous efficiency of such diodes is challenging because of their internal structural properties such as micropores. Herein, we developed phosphor-in-glass (PiG) plates by mixing a blue LED chip and yellow phosphor to create high-power white LEDs (w-LEDs). In addition, the influence of post-annealing on the prepared PiG plates at different temperatures (350°C-550 °C) was investigated. Post-annealing, a treatment that facilitates the mobility of the ceramic matrix encapsulating the phosphor powder, decreases an LED's porosity, thereby enhancing its overall luminous efficiency. Results show that PiG plates post-annealed at 450 °C exhibit superior optical performance and effective color properties than PiG plates that were non-annealed or post-annealed at 350 °C, 400 °C, 500 °C, and 550 °C. Therefore, post-annealed PiG plates are more suitable potential materials for application in the high-power LED industry.

KW - Automotive headlamp

KW - High-power LED

KW - Luminous efficiency

KW - PiG plates

KW - Post-annealing

UR - http://www.scopus.com/inward/record.url?scp=85073022460&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85073022460&partnerID=8YFLogxK

U2 - 10.1016/j.ceramint.2019.10.013

DO - 10.1016/j.ceramint.2019.10.013

M3 - Article

AN - SCOPUS:85073022460

VL - 46

SP - 3113

EP - 3118

JO - Ceramics International

JF - Ceramics International

SN - 0272-8842

IS - 3

ER -