Sterically Wrapped Multiple Resonance Fluorophors for Suppression of Concentration Quenching and Spectrum Broadening

Multiple resonance (MR) emitters are promising for highly efficient organic light-emitting diodes (OLEDs) with narrowband emission; however, they still face intractable challenges with concentration-caused emission quenching, exciton annihilation, and spectral broadening. In this study, sterically wrapped MR dopants with a fluorescent MR core sandwiched by bulk substituents were developed to address the intractable challenges by reducing intermolecular interactions. Consequently, high photo-luminance quantum yields of >= 90% and small full width at half maximums (FWHMs) of

多共振（MR）发射体对于具有窄带发射的高效有机发光二极管（OLED）很有前景；然而，它们仍然面临着由浓度引起的发射猝灭、激子湮灭和光谱展宽等棘手挑战。在这项研究中，开发了具有被大体积取代基夹在中间的荧光MR核的空间包裹MR掺杂剂，通过减少分子间相互作用来应对这些棘手挑战。因此，获得了≥90%的高光致发光量子产率以及较小的半峰全宽（FWHMs）。