TITLE

White light-emitting devices based on the combined emission from red CdSe/ZnS quantum dots, green phosphorescent, and blue fluorescent organic molecules

AUTHOR(S)
Gang Cheng; Mazzeo, Marco; Rizzo, Aurora; Yanqin Li; Yu Duan; Gigli, Giuseppe
PUB. DATE
June 2009
SOURCE
Applied Physics Letters;6/15/2009, Vol. 94 Issue 24, p243506
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report on a white hybrid light-emitting device realized by combining red emission from CdSe/ZnS quantum dots (QDs), green emission from a phosphorescent organic complex tris[2-4(4-toltyl)phenylpyridine]iridium [Ir(mppy)3], and blue emission from a fluorescent organic emitter 2,2′,7,7′-tetrakis(2,2-diphenylvinyl)spiro-9,9′-bifluorene. Energy transfer processes from the organic components to the QDs have been analyzed versus the Ir(mppy)3 concentration in order to optimize the device performances. A maximum external quantum efficiency of 2.1%, corresponding to a power efficiency of 2.2 lm/W at 13 mA/cm2, and a color rendering index of 89.8 at 10 200 cd/m2 were achieved.
ACCESSION #
42223730

 

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