Conformal phosphor coating using pulsed spray to reduce color deviation of white LEDs

Hsin Tao Huang, Chuang Chuang Tsai, Yi-Pai Huang

Research output: Contribution to journalArticlepeer-review

83 Scopus citations

Abstract

This work presents a novel “pulsed spray (PS)” process for the coating of yellow YAG:Ce3+ phosphor on blue InGaN-based light emitting diodes (LEDs). To coat a phosphor layer of high quality on an LED chip surface, the PS approach is used and studied because of the uniform color distribution, providing a wide range of color temperatures. This PS coating approach applies phosphor by exploiting mechanical principles without risk of chemical pollution. Additionally, it can be applied to wire-bonded LEDs and an array of LED chips on a substrate to fabricate a large-area, planar illumination system of high optical quality, which is easy to manufacture.

Original languageEnglish
Pages (from-to)A201-A206
JournalOptics Express
Volume18
Issue number102
DOIs
StatePublished - 21 Jun 2010

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