Matches in SemOpenAlex for { <https://semopenalex.org/work/W2240252848> ?p ?o ?g. }
Showing items 1 to 92 of
92
with 100 items per page.
- W2240252848 abstract "We present highly efficient, low-voltage multilayer organic light emitting diodes based on the phosphorescent emitter tris(2-phenylpyridine) iridium (Ir(ppy)3). The phosphor is doped into various wide gap electron-transport or hole-transport host materials embedded in between doped transport layers. We use 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4-TCNQ) doped N,N,N',N'-tetrakis(4-methoxyphenyl)-benzidine (MeO-TPD) as p-type hole-injection and transport layer, while cesium (Cs) and 4,7-diphenyl-1,10-phenanthroline (Bphen) are co-evaporated for the n-type doped electron transport layer. Sandwiched between these two transport layers, we insert one or two emission layers. This p-i-n structure results in efficient carrier injection from both contacts into the doped transport layers and low ohmic losses. Thus, lower operating voltages are obtained compared to conventional undoped OLEDs. By doping Ir(ppy)<sub>3</sub> into a double layer structure of predominantly electron and hole transporting hosts, a power efficiency of 70 lm/W and an external quantum efficiency of 19.5% is achieved at 100 cd/m<sup>2</sup> (2.95V). Besides this, the efficiency decays only weakly with increasing current density (or brightness). A quantum efficiency of 13.5% is still obtained at a current density of 100 mA/m<sup>2</sup> with a luminance around 50,000 cd/m<sup>2</sup>. This improvement can be attributed mainly to the fact that we prevent any charge accumulation at hole or electron blocking layers and spread the generation region to both sides of the interface between the two parts of the emission layer. Moreover, losses due to non-radiative decay of triplet excitons diffusing into regions without the phosphorescent dye are avoided." @default.
- W2240252848 created "2016-06-24" @default.
- W2240252848 creator A5012305133 @default.
- W2240252848 creator A5016682273 @default.
- W2240252848 creator A5021394407 @default.
- W2240252848 creator A5022534459 @default.
- W2240252848 creator A5037851231 @default.
- W2240252848 creator A5054711684 @default.
- W2240252848 date "2004-11-10" @default.
- W2240252848 modified "2023-10-03" @default.
- W2240252848 title "Ultra-high-efficiency electrophosphorescent p-i-n OLEDs with double emission layers" @default.
- W2240252848 cites W1995358023 @default.
- W2240252848 cites W2003795842 @default.
- W2240252848 cites W2006319447 @default.
- W2240252848 cites W2045913948 @default.
- W2240252848 cites W2053630528 @default.
- W2240252848 cites W2056225060 @default.
- W2240252848 cites W2066422982 @default.
- W2240252848 cites W2072515914 @default.
- W2240252848 doi "https://doi.org/10.1117/12.563310" @default.
- W2240252848 hasPublicationYear "2004" @default.
- W2240252848 type Work @default.
- W2240252848 sameAs 2240252848 @default.
- W2240252848 citedByCount "16" @default.
- W2240252848 countsByYear W22402528482012 @default.
- W2240252848 countsByYear W22402528482013 @default.
- W2240252848 countsByYear W22402528482014 @default.
- W2240252848 countsByYear W22402528482015 @default.
- W2240252848 crossrefType "proceedings-article" @default.
- W2240252848 hasAuthorship W2240252848A5012305133 @default.
- W2240252848 hasAuthorship W2240252848A5016682273 @default.
- W2240252848 hasAuthorship W2240252848A5021394407 @default.
- W2240252848 hasAuthorship W2240252848A5022534459 @default.
- W2240252848 hasAuthorship W2240252848A5037851231 @default.
- W2240252848 hasAuthorship W2240252848A5054711684 @default.
- W2240252848 hasConcept C113196181 @default.
- W2240252848 hasConcept C120665830 @default.
- W2240252848 hasConcept C121332964 @default.
- W2240252848 hasConcept C150759737 @default.
- W2240252848 hasConcept C161790260 @default.
- W2240252848 hasConcept C171250308 @default.
- W2240252848 hasConcept C181817918 @default.
- W2240252848 hasConcept C185592680 @default.
- W2240252848 hasConcept C192562407 @default.
- W2240252848 hasConcept C205507967 @default.
- W2240252848 hasConcept C207740977 @default.
- W2240252848 hasConcept C2779227376 @default.
- W2240252848 hasConcept C43617362 @default.
- W2240252848 hasConcept C46918542 @default.
- W2240252848 hasConcept C49040817 @default.
- W2240252848 hasConcept C528581852 @default.
- W2240252848 hasConcept C55493867 @default.
- W2240252848 hasConcept C57863236 @default.
- W2240252848 hasConcept C62520636 @default.
- W2240252848 hasConcept C91881484 @default.
- W2240252848 hasConceptScore W2240252848C113196181 @default.
- W2240252848 hasConceptScore W2240252848C120665830 @default.
- W2240252848 hasConceptScore W2240252848C121332964 @default.
- W2240252848 hasConceptScore W2240252848C150759737 @default.
- W2240252848 hasConceptScore W2240252848C161790260 @default.
- W2240252848 hasConceptScore W2240252848C171250308 @default.
- W2240252848 hasConceptScore W2240252848C181817918 @default.
- W2240252848 hasConceptScore W2240252848C185592680 @default.
- W2240252848 hasConceptScore W2240252848C192562407 @default.
- W2240252848 hasConceptScore W2240252848C205507967 @default.
- W2240252848 hasConceptScore W2240252848C207740977 @default.
- W2240252848 hasConceptScore W2240252848C2779227376 @default.
- W2240252848 hasConceptScore W2240252848C43617362 @default.
- W2240252848 hasConceptScore W2240252848C46918542 @default.
- W2240252848 hasConceptScore W2240252848C49040817 @default.
- W2240252848 hasConceptScore W2240252848C528581852 @default.
- W2240252848 hasConceptScore W2240252848C55493867 @default.
- W2240252848 hasConceptScore W2240252848C57863236 @default.
- W2240252848 hasConceptScore W2240252848C62520636 @default.
- W2240252848 hasConceptScore W2240252848C91881484 @default.
- W2240252848 hasLocation W22402528481 @default.
- W2240252848 hasOpenAccess W2240252848 @default.
- W2240252848 hasPrimaryLocation W22402528481 @default.
- W2240252848 hasRelatedWork W1986968872 @default.
- W2240252848 hasRelatedWork W2002730121 @default.
- W2240252848 hasRelatedWork W2016117243 @default.
- W2240252848 hasRelatedWork W2018324780 @default.
- W2240252848 hasRelatedWork W2019751627 @default.
- W2240252848 hasRelatedWork W2045913948 @default.
- W2240252848 hasRelatedWork W2052647788 @default.
- W2240252848 hasRelatedWork W2075310749 @default.
- W2240252848 hasRelatedWork W2082398621 @default.
- W2240252848 hasRelatedWork W2551503882 @default.
- W2240252848 isParatext "false" @default.
- W2240252848 isRetracted "false" @default.
- W2240252848 magId "2240252848" @default.
- W2240252848 workType "article" @default.