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Tuning color-correlated temperature and color rendering index of phosphorescent white polymer light-emitting diodes: Towards healthy solid-state lighting
- Source :
- Organic Electronics. 34:18-22
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- We report on efficient solution-processed phosphorescent white polymer light-emitting diodes (WPLEDs) with tunable color-correlated temperature (CCT) and color rendering index (CRI), through rationally controlling the composition of the emission layer (EML) based on a near-infrared (NIR)-emitting dinuclear cyclometalated platinum (II) complex bridged with NˆS anionic ligand, named (niq) 2 Pt 2 (μ-C 8 PhOXT) 2 (Pt-1, in which PhOXT is 5-(phenyl-1,3,4-oxadiazole)-2-thiol, niq is 1-naphthylisoquinolinato), a sky-blue emitter iridium (III) bis[(4,6-di-fluorophenyl)-pyridinato-N,C2] (picolinate) (FIrpic), and a yellow emitter bis[2-(thieno[3,2- c ]pyridin-4-yl)phenyl]iridium(III)(acetylacetonato) (PO-01). One of the best three-color WPLEDs shows a CCT of 3246 K as well as an excellent high CRI of 87, which are greatly beneficial in reducing deep-blue light damage and simultaneously meet the requirement for good color reproduction. Meanwhile, the relevant WPLED also achieves a maximum current efficiency of 12.1 cd/A, corresponding to an external quantum efficiency of 10.6%. This work presents an effective approach through rational combination of sky-blue, yellow, and NIR emitters towards high-performance solution-processable WPLEDs with a physiologically-friendly CCT and a high CRI.
- Subjects :
- Materials science
chemistry.chemical_element
02 engineering and technology
010402 general chemistry
01 natural sciences
law.invention
Biomaterials
law
Materials Chemistry
Iridium
Electrical and Electronic Engineering
Diode
Common emitter
business.industry
General Chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
0104 chemical sciences
Electronic, Optical and Magnetic Materials
Color rendering index
Solid-state lighting
chemistry
Optoelectronics
Quantum efficiency
0210 nano-technology
Phosphorescence
Platinum
business
Subjects
Details
- ISSN :
- 15661199
- Volume :
- 34
- Database :
- OpenAIRE
- Journal :
- Organic Electronics
- Accession number :
- edsair.doi...........ff8fea4ab6fd8b9ccca125446f68ec62