Optical optimization of (Gd2-x-yAlx)O3:Eu3+y red phosphors for displays and YAG:Ce phosphors for white LEDs by combinatorial chemistry

Seonghoon Lee; Soo-Yeon Seo; Kee-Sun Sohn; Hee Dong Park

doi:10.1117/12.450031

5 December 2001 Optical optimization of (Gd_2-x-yAl_x)O₃:Eu³⁺_y red phosphors for displays and YAG:Ce phosphors for white LEDs by combinatorial chemistry

Seonghoon Lee, Soo-Yeon Seo, Kee-Sun Sohn, Hee Dong Park

Author Affiliations +

Proceedings Volume 4445, Solid State Lighting and Displays; (2001) https://doi.org/10.1117/12.450031
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

We optimized co-doped (Gd_2-x-yA_x)O₃:Eu³⁺_y phosphors for red FED phosphors using a combinatorial synthetic method and monitoring their photoluminescence and cathodoluminescence at low-voltage excitation. We have used a scanning multi-inkjet or adjustable micropipette delivery system and delivered micro- liter volumes of precursor solutions to the collection of each sample holders rapidly and accurately. Using combinational chemistry, we can at once characterize the UV, VUV, and CL properties of many individual compounds prepared in each sample holders. We find that Al co-doped Gd₂O₃:Eu³⁺ phosphors, i.e. (Gd_1.83Al_0.05)O₃:Eu³⁺_0.12 are superior to the commercial Y₂O₃:Eu phosphors at low-voltage excitation 400V. The filament lightbulbs and halogen lamps are widely used to light houses and offices but are energy-inefficient. GaN- based blue LEDs are the excitation source for YAG:Ce phosphors and the YAG:Ce phosphors convert the blue light into red and green lights. Using combinatorial chemistry, we find the optimal YAG:Ce phosphors, (Y_0.95Ce_0.05)₃Al₅O₁₂ for white LEDs. We fabricate highly energy-efficient white light emitting diodes by combining Yttrium Aluminium Garnet (YAG):Ce phosphors and blue LEDs.

Citation Download Citation

Seonghoon Lee, Soo-Yeon Seo, Kee-Sun Sohn, and Hee Dong Park "Optical optimization of (Gd_2-x-yAl_x)O₃:Eu³⁺_y red phosphors for displays and YAG:Ce phosphors for white LEDs by combinatorial chemistry", Proc. SPIE 4445, Solid State Lighting and Displays, (5 December 2001); https://doi.org/10.1117/12.450031

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available