Rapid room temperature synthesis of red iridium(iii ) complexes with Ir–S–P–S structures for efficient OLEDs
13
Citation
54
Reference
10
Related Paper
Citation Trend
Abstract:
Two red iridium(Keywords:
Quantum Efficiency
Homoleptic
Quantum Efficiency
Thermal Stability
Cite
Citations (14)
Abstract Red OLED : An orange–red‐emitting iridium complex ( N958 ) was prepared, and its photophysical and device‐based characteristics were investigated. Despite N958 displaying quite poor photophysical properties in solution (acetonitrile), organic light‐emitting diode (OLED) devices based on the complex exhibit an efficiency close to 10 %. magnified image
Cite
Citations (18)
Benzothiazole
Quantum Efficiency
Cite
Citations (9)
Abstract We demonstrate solution-processed host-free organic light-emitting diodes (OLEDs) using a thermally activated delayed fluorescence emitter 10-[4-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl]-9,9-dimethylacridan (DMAC-TRZ). A spin-coated neat DMAC-TRZ film shows weak concentration quenching, leading to a high photoluminescence quantum yield (PLQY) of 84%. OLEDs containing a neat film of DMAC-TRZ display a maximum external quantum efficiency (EQE) of 17.6%. Both the PLQY and EQE are the highest reported for solution-processed host-free films and OLEDs, respectively. In addition, the OLEDs exhibit an EQE of 16.8% at high luminance (over 400 cd m −2 ).
Quantum Efficiency
Quantum yield
Cite
Citations (34)
Abstract We have fabricated color tunable light sources by combining a transparent and a non‐transparent organic light emitting diodes (OLEDs). This type of color tunable OLED has efficiency losses due to the absorption of a transparent OLED. To minimize the efficiency losses, we have come up with an innovative transparent OLED, which has high transmittance for the light from a non‐transparent OLED and also high bottom to top emission intensity ratio for the light from a transparent OLED. Therefore, the lights from a non‐transparent and a transparent OLEDs could be maximized simultaneously, which resulted in efficient color tunable light sources.
Cite
Citations (3)
High-efficiency top-emitting organic light-emitting diodes (OLEDs) with step-doped emission layers are numerically investigated. The simulation results demonstrate that the OLEDs with step-doped emission layers have better electrical performance and higher emitting intensity than those without step-doped design. Compared to conventional OLED devices, step-doped OLEDs with Fabry-Pérot microcavity not only have fixed wavelength but also have narrow emission spectral width. The simulation results suggest that the OLED structure with step-doped design in a Fabry-Pérot microcavity has superior performance and hence is beneficial for the display applications.
Emission intensity
Cite
Citations (4)
Quantum Efficiency
Electrical efficiency
Quantum yield
Cite
Citations (8)
Quantum Efficiency
Luminous efficacy
Electrical efficiency
Luminous flux
Cite
Citations (14)
Quantum Efficiency
Thermal Stability
Cite
Citations (10)
Developing red thermally activated delayed fluorescence (TADF) emitters, attainable for both high-efficient red organic light-emitting diodes (OLEDs) and non-doped deep red/near-infrared (NIR) OLEDs, is challenging. Now, two red emitters, BPPZ-PXZ and mDPBPZ-PXZ, with twisted donor-acceptor structures were designed and synthesized to study molecular design strategies of high-efficiency red TADF emitters. BPPZ-PXZ employs the strictest molecular restrictions to suppress energy loss and realizes red emission with a photoluminescence quantum yield (ΦPL ) of 100±0.8 % and external quantum efficiency (EQE) of 25.2 % in a doped OLED. Its non-doped OLED has an EQE of 2.5 % owing to unavoidable intermolecular π-π interactions. mDPBPZ-PXZ releases two pyridine substituents from its fused acceptor moiety. Although mDPBPZ-PXZ realizes a lower EQE of 21.7 % in the doped OLED, its non-doped device shows a superior EQE of 5.2 % with a deep red/NIR emission at peak of 680 nm.
Quantum Efficiency
Quantum yield
Acceptor
Cite
Citations (285)