TY - JOUR
T1 - Light distribution and light extraction improvement mechanisms of remote GaN-based white light-emitting-diodes using ZnO nanorod array
AU - Lee, Ching Ting
AU - Wu, Tong Jui
N1 - Funding Information:
This work was supported from the National Science Council of Taiwan, Republic of China under the Contract nos. NSC-99–2221-E-006–106-MY3 and NSC-99–2221-E-006–208-MY3 , the Advanced Optoelectronic Technology Center of the National Cheng Kung University.
Copyright:
Copyright 2013 Elsevier B.V., All rights reserved.
PY - 2013
Y1 - 2013
N2 - To improve the light uniform distribution, light extraction efficiency, and phosphor conversion efficiency, both the remote phosphor coating method and the ZnO nanorod array were simultaneously utilized for fabricating the remote GaN-based white light-emitting diodes with ZnO nanorod array. Compared with the luminous flux of 1.23 lm and phosphor conversion efficiency of 74.0% of the traditional GaN-based white light-emitting diodes, the light output power and phosphor conversion efficiency of the resulting remote GaN-based white light-emitting diodes with ZnO nanorod array operated at the same injection current were improved to 1.96 lm and 89.1%, respectively. According to the measured angular distribution of the light output, the remote coating phosphor layer could make light diffusion to lead uniform light distribution. Furthermore, the ZnO nanorod array could improve the light extraction efficiency and could guide the blue light to pump the remote coating phosphor layer to convert blue light into yellow emission.
AB - To improve the light uniform distribution, light extraction efficiency, and phosphor conversion efficiency, both the remote phosphor coating method and the ZnO nanorod array were simultaneously utilized for fabricating the remote GaN-based white light-emitting diodes with ZnO nanorod array. Compared with the luminous flux of 1.23 lm and phosphor conversion efficiency of 74.0% of the traditional GaN-based white light-emitting diodes, the light output power and phosphor conversion efficiency of the resulting remote GaN-based white light-emitting diodes with ZnO nanorod array operated at the same injection current were improved to 1.96 lm and 89.1%, respectively. According to the measured angular distribution of the light output, the remote coating phosphor layer could make light diffusion to lead uniform light distribution. Furthermore, the ZnO nanorod array could improve the light extraction efficiency and could guide the blue light to pump the remote coating phosphor layer to convert blue light into yellow emission.
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U2 - 10.1016/j.jlumin.2012.12.057
DO - 10.1016/j.jlumin.2012.12.057
M3 - Article
AN - SCOPUS:84873838409
VL - 137
SP - 143
EP - 147
JO - Journal of Luminescence
JF - Journal of Luminescence
SN - 0022-2313
ER -