Pure White Organic Light-Emitting Diode with Lifetime Approaching the Longevity of Yellow Emitter

Autor:	Jwo-Huei Jou, Yung-Cheng Tsai, Shih-Ming Shen
Rok vydání:	2011
Předmět:	Materials science Naphthacenes business.industry Doping chemistry.chemical_compound Semiconductors chemistry OLED Optoelectronics Spectrophotometry Ultraviolet General Materials Science business Rubrene Lighting Recombination Diode Common emitter
Zdroj:	ACS Applied Materials & Interfaces. 3:3134-3139
ISSN:	1944-8252 1944-8244
DOI:	10.1021/am2006383
Popis:	A high-efficiency pure white organic light-emitting diode was fabricated with lifetime approaching that of the low-excitation-energy (yellow) emitter containing counterpart, or six times that of the deep-blue counterpart. The white device was composed of two emission layers with mixed hosts of different compositions. They were respectively doped with yellow rubrene and deep-blue 4,4'-bis-[4-{N,N,N',N'- tetrakis-(4-fluoro-diphenylamino)-phenyl}-vinyl]-biphenyl. The resulting efficiency was 6.0 lm/W (12.4 cd/A) at 20 mA/cm(2). The long device lifetime may be attributed to the double mixed-host architecture employed that effectively dispersed the injected carriers into three different recombination zones and consequently diluted the damaging effect arising from the accumulated charge from un-recombined carriers, hence leading to a markedly improved lifespan.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b2a7a6e6de1a2975dd27fe26687f5f77 https://doi.org/10.1021/am2006383 Zobrazit plný text záznamu