A Novel Approach to Characterize Phosphor Particles for the Color Tuning of WLEDs

Jiaqi Wang; Jeffery C.C. Lo; S. W. Ricky Lee; Mian Tao; Huayong Zou; Feng Yun

doi:10.1109/LPT.2017.2781804

A Novel Approach to Characterize Phosphor Particles for the Color Tuning of WLEDs

Jiaqi Wang
, Jeffery C.C. Lo
, S. W. Ricky Lee
, Mian Tao
, Huayong Zou
, Feng Yun

Faculty of Electronic and Information Engineering

Hong Kong University of Science and Technology

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

A novel approach was proposed to characterize the optical performance of phosphor particles based on a laser particle analyzer (LPA). For Sr₃SiO₅:Eu phosphor, under single scattering condition, the angular scattering pattern was determined based on the measured radiant powers by detector arrays located at different scattering angles in the LPA, while the relationship between scattering coefficients and phosphor concentrations was obtained by measured obscuration ratios. Ray-tracing simulations were undertaken, employing the measured optical parameters as inputs. The transmittance measurement setup was built based on a goniophotometer, and 3528 commercial white light-emitting diodes (WLEDs) were packaged with the phosphor and silicone in different mixing ratios. The simulated transmittances and spectral power distributions for WLEDs were compared with measurements to verify the effectiveness of the characterized scattering parameters. The developed methodology may be used to optimize phosphors for the color tuning of WLEDs.

Original language	English
Pages (from-to)	513-516
Number of pages	4
Journal	IEEE Photonics Technology Letters
Volume	30
Issue number	6
DOIs	https://doi.org/10.1109/LPT.2017.2781804
State	Published - 15 Mar 2018

Keywords

Monte Carlo ray-tracing
White light-emitting diodes (WLEDs)
light scattering
packaging
phosphor

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10.1109/LPT.2017.2781804

Cite this

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title = "A Novel Approach to Characterize Phosphor Particles for the Color Tuning of WLEDs",

abstract = "A novel approach was proposed to characterize the optical performance of phosphor particles based on a laser particle analyzer (LPA). For Sr3SiO5:Eu phosphor, under single scattering condition, the angular scattering pattern was determined based on the measured radiant powers by detector arrays located at different scattering angles in the LPA, while the relationship between scattering coefficients and phosphor concentrations was obtained by measured obscuration ratios. Ray-tracing simulations were undertaken, employing the measured optical parameters as inputs. The transmittance measurement setup was built based on a goniophotometer, and 3528 commercial white light-emitting diodes (WLEDs) were packaged with the phosphor and silicone in different mixing ratios. The simulated transmittances and spectral power distributions for WLEDs were compared with measurements to verify the effectiveness of the characterized scattering parameters. The developed methodology may be used to optimize phosphors for the color tuning of WLEDs.",

keywords = "Monte Carlo ray-tracing, White light-emitting diodes (WLEDs), light scattering, packaging, phosphor",

author = "Jiaqi Wang and Lo, \{Jeffery C.C.\} and \{Ricky Lee\}, \{S. W.\} and Mian Tao and Huayong Zou and Feng Yun",

note = "Publisher Copyright: {\textcopyright} 1989-2012 IEEE.",

year = "2018",

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doi = "10.1109/LPT.2017.2781804",

language = "英语",

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pages = "513--516",

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T1 - A Novel Approach to Characterize Phosphor Particles for the Color Tuning of WLEDs

AU - Wang, Jiaqi

AU - Lo, Jeffery C.C.

AU - Ricky Lee, S. W.

AU - Tao, Mian

AU - Zou, Huayong

AU - Yun, Feng

PY - 2018/3/15

Y1 - 2018/3/15

N2 - A novel approach was proposed to characterize the optical performance of phosphor particles based on a laser particle analyzer (LPA). For Sr3SiO5:Eu phosphor, under single scattering condition, the angular scattering pattern was determined based on the measured radiant powers by detector arrays located at different scattering angles in the LPA, while the relationship between scattering coefficients and phosphor concentrations was obtained by measured obscuration ratios. Ray-tracing simulations were undertaken, employing the measured optical parameters as inputs. The transmittance measurement setup was built based on a goniophotometer, and 3528 commercial white light-emitting diodes (WLEDs) were packaged with the phosphor and silicone in different mixing ratios. The simulated transmittances and spectral power distributions for WLEDs were compared with measurements to verify the effectiveness of the characterized scattering parameters. The developed methodology may be used to optimize phosphors for the color tuning of WLEDs.

AB - A novel approach was proposed to characterize the optical performance of phosphor particles based on a laser particle analyzer (LPA). For Sr3SiO5:Eu phosphor, under single scattering condition, the angular scattering pattern was determined based on the measured radiant powers by detector arrays located at different scattering angles in the LPA, while the relationship between scattering coefficients and phosphor concentrations was obtained by measured obscuration ratios. Ray-tracing simulations were undertaken, employing the measured optical parameters as inputs. The transmittance measurement setup was built based on a goniophotometer, and 3528 commercial white light-emitting diodes (WLEDs) were packaged with the phosphor and silicone in different mixing ratios. The simulated transmittances and spectral power distributions for WLEDs were compared with measurements to verify the effectiveness of the characterized scattering parameters. The developed methodology may be used to optimize phosphors for the color tuning of WLEDs.

KW - Monte Carlo ray-tracing

KW - White light-emitting diodes (WLEDs)

KW - light scattering

KW - packaging

KW - phosphor

UR - https://www.scopus.com/pages/publications/85038868995

U2 - 10.1109/LPT.2017.2781804

DO - 10.1109/LPT.2017.2781804

M3 - 文章

AN - SCOPUS:85038868995

SN - 1041-1135

VL - 30

SP - 513

EP - 516

JO - IEEE Photonics Technology Letters

JF - IEEE Photonics Technology Letters

IS - 6

ER -

A Novel Approach to Characterize Phosphor Particles for the Color Tuning of WLEDs

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Keywords

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