Multi-Sensitization Strategy for High Efficiency and Low Efficiency Roll-off Solution-Processed Single-Emission-Layer All-Fluorescence White Organic Light-Emitting Diodes

Synergetic Modulation of Steric Hindrance and Excited State for Anti‐Quenching and Fast Spin‐Flip Multi‐Resonance Thermally Activated Delayed Fluorophore

“…[8][9][10] One strategy to mitigate ACQ is to disperse dopant into a high-energy-gap host matrix. While the majority of optimally performing MR-TADF OLEDs are fabricated with low doping ratios (< 5 wt %) in their emissive layers (EMLs), this approach introduces challenges such as inefficient host-to-guest energy transfer, [11] unbalanced carrier transport, [12] and the need for strict control of the evaporation rate during device fabrication. The steric decoration of luminophore motifs has been proven effective in suppressing ACQ, preserving solid-state luminescence properties like emission color, full-width at half-maximum (FWHM), and PLQY, comparable to those observed in dilute solution.…”

Efficient thermally activated delayed fluorophores featuring multi-donor arms and a π-extended acceptor core

“…19 To mitigate emission quenching, the emissive materials must be dispersed within a suitable host material at low concentrations (<5 wt%). 20–22 Nevertheless, this method also brings about additional issues, such as insufficient host-to-guest energy transfer, 23 imbalanced charge transport, 6 and the need for precise regulation of the evaporation rate during device fabrication.…”

Single-molecule white organic light-emitting diodes based on dual-conformation diindolophenthiazine derivatives

“…Due to their advantages in terms of energy efficiency, environmentally friendly nature, mass manufacturability, and high color rendering index (CRI), OLEDs have attracted substantial attention in the realms of displays, sensing, and solid-state lighting sources. 3–8 Conventional methods for creating white OLEDs often involve combining organic materials of different emission colors, such as blue/yellow and blue/green/red emitters. 3,8–17 However, the devices typically feature complex multilayer architectures, resulting in drawbacks such as intricate manufacturing technologies, high costs, color aging, and efficiency degradation, hindering their further development.…”

“…3–8 Conventional methods for creating white OLEDs often involve combining organic materials of different emission colors, such as blue/yellow and blue/green/red emitters. 3,8–17 However, the devices typically feature complex multilayer architectures, resulting in drawbacks such as intricate manufacturing technologies, high costs, color aging, and efficiency degradation, hindering their further development. 18,19 The focus has shifted towards single molecular white emitters due to their simplicity in manufacturing, reproducibility, and stable emission spectra.…”