Compact multilayer thin-film color filters and direct integration on white-light-emitting diodes for color conversion

Serap Yigen; Merve Ekmekcioglu; Merve Ekmekcioglu; Mehtap Ozdemir; Gulnur Aygun; Lutfi Ozyuzer; Lutfi Ozyuzer

doi:10.1364/AO.431613

Applied Optics
Vol. 60,
Issue 28,
pp. 8949-8955
(2021)
•https://doi.org/10.1364/AO.431613

Compact multilayer thin-film color filters and direct integration on white-light-emitting diodes for color conversion

Serap Yigen, Merve Ekmekcioglu, Mehtap Ozdemir, Gulnur Aygun, and Lutfi Ozyuzer

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Serap Yigen, Merve Ekmekcioglu, Mehtap Ozdemir, Gulnur Aygun, and Lutfi Ozyuzer, "Compact multilayer thin-film color filters and direct integration on white-light-emitting diodes for color conversion," Appl. Opt. 60, 8949-8955 (2021)

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Table of Contents Category
- Optical Design and Fabrication
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The topics in this list come from the Optics and Photonics Topics applied to this article.

About this Article
History
- Original Manuscript: May 18, 2021
- Revised Manuscript: August 31, 2021
- Manuscript Accepted: September 7, 2021
- Published: September 30, 2021

Abstract

We present highly efficient green, yellow, and red filters based on a metal–dielectric structure. The filters encompass only five layers of alternating zinc tin oxide and silver thin films that are grown on soda lime glass and white light-emitting diodes (LEDs) using direct current magnetron sputtering at room temperature. The designed filters provide efficient color filtering in the visible spectrum. High purity colored light is obtained by direct application of filters on LEDs as color converters. The presented method offers an easy way for realizing different colors by tuning the thicknesses of layers in the structure.

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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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	Green	Yellow	Red
ZTO	181.730 nm	206.976 nm	228.016 nm
Ag	35.635 nm	37.826 nm	34.738 nm
ZTO	82.015 nm	93.124 nm	107.700 nm
Ag	42.123 nm	45.094 nm	40.956 nm
ZTO	172.462 nm	190.876 nm	214.319 nm
Total	513.97 nm	573.90 nm	625.73 nm

	$λ_{p e a k}$ (nm)		$T %$		Thickness (nm)
	Exp.	Sim.	Exp.	Sim.	Exp.	Sim.
G	538	535	60.9	58.7	503.80	513. 97
Y	573	575	45.5	54.2	566.30	573.90
R	630	630	41.5	53.4	618.10	625.73

	$λ_{p e a k}$ (nm)			$λ_{p e a k}$ (nm)
	Exp.	Sim.		Exp.	Sim.
LED-A	530.5	529	LED- $A^{'}$	523	522
LED-B	523.5		LED- $B^{'}$	527.5
LED-C	563.5	572	LED- $C^{'}$	569.5	564
LED-D	584.5		LED- $D^{'}$	577
LED-E	613	626	LED- $E^{'}$	606	618
LED-F	616		LED- $F^{'}$	603

	Green	Yellow	Red
ZTO	181.730 nm	206.976 nm	228.016 nm
Ag	35.635 nm	37.826 nm	34.738 nm
ZTO	82.015 nm	93.124 nm	107.700 nm
Ag	42.123 nm	45.094 nm	40.956 nm
ZTO	172.462 nm	190.876 nm	214.319 nm
Total	513.97 nm	573.90 nm	625.73 nm

	$λ_{p e a k}$ (nm)		$T %$		Thickness (nm)
	Exp.	Sim.	Exp.	Sim.	Exp.	Sim.
G	538	535	60.9	58.7	503.80	513. 97
Y	573	575	45.5	54.2	566.30	573.90
R	630	630	41.5	53.4	618.10	625.73

Abstract

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Applied Optics