TELKOMNIKA Telecommunication, Computing, Electronics and Control
Investigation on the application of ZnO nanostructures to improve the optical performance of white light-emitting diodes

TELKOMNIKA Telecommunication, Computing, Electronics and Control
Investigation on the application of ZnO nanostructures to improve the optical performance of white light-emitting diodes

Color uniformity
Luminous flux
Mie-scattering theory
ZnO

Though combining blue LED chips with yellow phosphor has been the most
common method in white light-emitting diode (WLED) production, the
attained angular correlated color temperature (CCT) uniformity is still poor.
Thus, this article proposes to add ZnO nanostructures to WLED packages to
promote the color uniformity of the WLEDs. The outcomes of the research
demonstrate that utilizing ZnO at different amount can affect the scattering
energy and the CCT deviations in WLEDs packages in different extents.
Particularly, adding the node-like (N-ZnO), sheet-like (S-ZnO), and rod-like
(R-ZnO) leads to the corresponding decreases of CCT deviations from 3455.49
K to 96.30 K, 40.03 K, and 60.09 K, respectively. Meanwhile, with 0.25%
N-ZnO, 0.75% S-ZnO, and 0.25% R-ZnO, WLED devices can achieve both
better CCT homogeneity and lower reduction in luminous flux. The results of
this article can be a valuable document for the manufacturer to use as reference
in improving their WLED products.

My Hanh Nguyen Thi, Phung Ton That, Hoang Van Ngoc

http://journal.uad.ac.id/index.php/TELKOMNIKA

Sep 5, 2020

peri irawan

pdf

english

text