Boron‐Dipyrromethene‐Based Fluorescent Emitters Enable High‐Performance Narrowband Red Organic Light‐Emitting Diodes

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Abstract
Narrowband organic light‐emitting diodes (OLEDs) are receiving significant attention and have demonstrated impressive performance in blue and green OLEDs. However, developing high‐performance narrowband red OLEDs remains a highly desired yet challenging task. Herein, we have developed narrowband red fluorescent emitters by utilizing a boron‐dipyrromethene (BODIPY) skeleton in combination with a methyl‐shield strategy. These emitters exhibit small full‐width at half‐maxima (FWHM) ranging from 21 nm (0.068 eV) to 25 nm (0.081 eV) and high photoluminescence quantum yields (ΦPL) ranging from 88.5 % to 99.0 % in toluene solution. Using BODIPY‐based luminescent materials as emitters, high‐performance narrowband red OLEDs have been assembled with external quantum efficiency as high as 18.3 % at 623 nm and 21.1 % at 604 nm. This work represents, to our knowledge, the first successful case of achieving NTSC pure‐red OLEDs with the Commission Internationale de l’Éclairage (CIE) coordinates of [0.67, 0.33] based on conventional fluorescent emitters.
Funding Information
  • National Natural Science Foundation of China (22275127 and 22005204, 22031007)

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