Fabrication and Characterisation of Organic EL Devices in the Presence of Cyclodextrin as an Interlayer

This study examined glass-based organic electroluminescence in the presence of a cyclodextrin polymer as an interlayer. Glass-based organic electroluminescence was achieved by the deposition of five layers of N,N’-Bis(3-methylphenyl)N,N’-bis(phenyl)-benzidine, cyclodextrin polymer (CDP), tris-(8-hydroxyquinolinato) aluminium LiF and Al on an indium tin oxide-coated glass substrate. The glass-based OEL exhibited green emission owing to the fluorescence of tris-(8-hydroxyquinolinato) aluminium. The highest luminance was 19,620 cd m−2. Moreover, the glass-based organic electroluminescence device showed green emission at 6 V in the curved state because of the inhibited aggregation of the cyclodextrin polymer. All organic molecules are insulating, but except CDP, they are standard molecules in conventional organic electroluminescence devices. In this device, the CDP layer contained pores that could allow conventional organic molecules to enter the pores and affect the organic electroluminescence interface. In particular, self-association was suppressed, efficiency was improved, and light emission was observed without the need for a high voltage. Overall, the glass-based organic electroluminescence device using CDP is an environmentally friendly device with a range of potential energy saving applications.

Multiple “Hot exciton” channel molecular design in organic electroluminescence materials: a theoretical investigation

One “Hot exciton” channel is expanded into multiple channels through molecular design, which improves the efficiency of RISC.

Hydrogen bond-modulated molecular packing and its applications in high-performance non-doped organic electroluminescence

Suitable intermolecular hydrogen bonding enables the formation of a fixed 3D supramolecular framework and suppresses the exciton nonradiative decays and quenching.

High-quality warm white organic electroluminescence from efficient phosphor-only emitting systems based on bipolar iridium(iii) complexes

Warm white organic light-emitting diodes (WOLEDs) based on efficient phosphor-only emitting systems exhibit very high peak electroluminescence (EL) efficiencies of 25.0/22.5% and 71.3/59.3 lm W−1 and desirable color rendering index (CRI) of 81/90.

Progress on ultraviolet organic electroluminescence and lasing

This review focusses on UV organic light-emitting diodes and organic solid-state lasers, and covers their recent development from organic chromophores and device configuration to practical applications.

Simple/efficient phosphor-only emitting systems: from sky-blue to warm-white organic electroluminescence based on a novel bipolar phosphorescent emitter as the host

A simple single-emitting layer only containing two phosphors of FMPYPCA (sky blue)/BZQBA (orange red) realizes a high-quality warm-white electroluminescence with CIEx,y of (0.42, 0.45) and very high peak efficiencies of 22.4%/65.4 lm W−1.