Highly efficient, single-layer organic light-emitting devices based on a graded-composition emissive layer

Autor:	Nicholas C. Erickson, Russell J. Holmes
Rok vydání:	2010
Předmět:	Materials science Physics and Astronomy (miscellaneous) business.industry Electroluminescence Cathode law.invention Anode Organic semiconductor law OLED Optoelectronics Phosphorescent organic light-emitting diode business Layer (electronics) Common emitter
Zdroj:	Applied Physics Letters. 97:083308
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.3481426
Popis:	We demonstrate highly efficient electrophosphorescence from devices comprising a single organic layer. High efficiency is realized by combining both hole- and electron-transporting host materials (HTMs and ETMs, respectively) into a single, graded-composition emissive layer with the green phosphorescent emitter fac-tris(2-phenylpyridine) iridium (III). The composition is continuously graded to realize nearly 100% HTM at the anode and nearly 100% ETM at the cathode. Peak external quantum and power efficiencies of ηEQE=(19.3±0.4)% and ηP=(66.5±1.3) lm/W are realized at a luminance level of 600 cd/m2.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8f6af535222b122594a991aa9b710cd3 https://doi.org/10.1063/1.3481426 Zobrazit plný text záznamu