Hybrid spacer for high-efficiency white organic light-emitting diodes

High-efficient white organic light-emitting diodes (WOLEDs) were fabricated by using the following three different emitting materials: 4 ″ -(2,2-diphenylvinyl)-1-[4-( N , N -diphenylamino)-styryl]-terphenyl for blue emission, fac -tris(2-phenypyridine) iridium(III) for green emission, and bis(5-benz...

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Veröffentlicht in:Applied physics letters 2008-05, Vol.92 (18), p.183303-183303-3
Hauptverfasser: Seo, Ji Hoon, Park, Il Houng, Kim, Gu Young, Lee, Kum Hee, Kim, Min Kyu, Yoon, Seung Soo, Kim, Young Kwan
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container_end_page 183303-3
container_issue 18
container_start_page 183303
container_title Applied physics letters
container_volume 92
creator Seo, Ji Hoon
Park, Il Houng
Kim, Gu Young
Lee, Kum Hee
Kim, Min Kyu
Yoon, Seung Soo
Kim, Young Kwan
description High-efficient white organic light-emitting diodes (WOLEDs) were fabricated by using the following three different emitting materials: 4 ″ -(2,2-diphenylvinyl)-1-[4-( N , N -diphenylamino)-styryl]-terphenyl for blue emission, fac -tris(2-phenypyridine) iridium(III) for green emission, and bis(5-benzoyl-2-phenylpyridinato- C , N )iridium(III) (acetylacetonate) for red emission. For higher efficiency, a hybrid spacer (HS) was inserted between each emissive layer (blue-red, red-green, and green-blue emissive layers). It was found that the WOLEDs using HS showed maximum power efficiency of 28.69 lm ∕ W , maximum external quantum efficiency of 13.1%, and Commission Internationale de I'Eclairage coordinates ( CIE x , y ) of ( x = 0.37 , y = 0.37 ) .
doi_str_mv 10.1063/1.2907190
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title Hybrid spacer for high-efficiency white organic light-emitting diodes
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