Duplicating “sunlight” from simple WOLEDs for lighting applications

Abstract

Simple single-dopant white organic light-emitting devices (WOLEDs) with optimized efficiency/color quality/brightness trade-offs are developed; the white light produced shows the best color quality ever exhibited by WOLEDs at very high brightness, and is even able to duplicate the natural sunlight source.

Organometallic Versus Organic Molecules for Energy Conversion in Organic Light-Emitting Diodes and Solar Cells

“…The corresponding CIE coordinates are (0.42, 0.38) [45]. The highest CRI based on the monomer excimer approach was reported by Zhou et al using Pt-Ge doped into CBP host material [46]. At the emitter concentration of 10 wt% for Pt-Ge, the CIE coordinates of (0.354, 0.360) were obtained with a very high CRI of 97.…”

P‐200L: Late‐News Poster: High‐Efficiency, High Color Rendering White OLEDs with Five Emitters

“…Numerous studies have been reported in obtaining high CRI, which include the use of multiple emissive layers, 3 three different emitters in one single emissive layer, combining blue fluorescent dye with green and red phosphors to obtain high CRI with a near 100% internal quantum efficiency (IQE) 4 and exciplex emission. 5,6 However, the resulting efficiency is not sufficiently high for illumination at high brightness. Several approaches are therefore employed herein in order to probe the possibility of fabricating an OLED with a highest CRI while still having a relatively high power efficiency.…”

Synthesis and characterization of phenylpyridine derivative containing an imide functional group on an iridium (III) complex for solution-processable orange-phosphorescent organic light-emitting diodes

“…A mixture of impy (4) (6.0 g, 22.5 mmol), iridium(III) chloride hydrate (3.2 g, 10.7 mmol), 2-ethoxyethanol (60 mL), and water (20 mL) was deoxygenated and then heated to reflux under nitrogen for 24 h at 120 C. After cooling to room temperature, the mixture was filtrated and washed with ethanol to give product Ir(III)-m-chloride-bridged dimer (5). A mixture of the Ir(III)-mchloride-bridged dimer (5.80 g, 5.88 mmol), 2,2,6,6-tetramethyl-3,5-heptanedione (3.68 mL, 17.6 mmol), K 2 CO 3 (5.70 g, 41.24 mmol), and ethoxyethanol (40 mL) was deoxygenated and heated to reflux under nitrogen for 24 h at 120 C. After cooling to room temperature, the mixture was evaporated under vacuum and extracted with dichloromethane (100 mL).…”