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UV–Vis Spectroscopy of Conjugated Systems01:32

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Structurally Strained Red-BODIPYs for High-Color-Purity Organic Light Emitting Diodes.

Ajeet Chandra1, Nisha Vergineya S1, Odugu Pavan Kumar1

  • 1Organic Optoelectronic Device Lab. (OODL), Department of Information Display, Kyung Hee University,26, Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea.

ACS Applied Materials & Interfaces
|August 7, 2025
PubMed
Summary

New Boron dipyrromethene (BODIPY) emitters achieve deep-red narrow emission, meeting BT2020 standards with high photoluminescence quantum yield (PLQY). The DBF-BODIPY molecule demonstrated excellent performance in organic light-emitting diodes (OLEDs).

Keywords:
BODIPYBT2020TSF-OLEDdeep-red emissionhigh PLQY

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Area of Science:

  • Organic Chemistry
  • Materials Science
  • Photophysics

Background:

  • Boron dipyrromethene (BODIPY) dyes offer high photoluminescence quantum yield (PLQY) and narrow emission spectra.
  • Achieving deep-red narrow emission that meets BT2020 standards with high PLQY is a significant challenge in fluorescent materials development.

Purpose of the Study:

  • To develop novel red fluorescent emitters based on BODIPY with improved deep-red emission properties.
  • To investigate the effect of meso-position substituents on the photophysical properties and emission characteristics of BODIPY dyes.
  • To evaluate the performance of these novel emitters in thermally activated delayed fluorescence (TADF)-sensitized organic light-emitting diodes (OLEDs).

Main Methods:

  • Synthesis of four new BODIPY derivatives (DBF-BODIPY, DFP-BODIPY, TFP-BODIPY, PFP-BODIPY) by substituting dibenzofuranyl and fluorophenyl units at the meso-position.
  • Photophysical characterization including emission spectra, full width at half-maximum (fwhm), and PLQY measurements in toluene solution.
  • Fabrication and characterization of TADF-sensitized OLEDs using the synthesized BODIPY emitters.

Main Results:

  • The synthesized BODIPY derivatives exhibited emission in the deep-red region (619-635 nm) with narrow fwhm (33-39 nm).
  • Pentafluorophenyl substitution resulted in narrow fwhm and CIE coordinates close to BT2020 standards.
  • DBF-BODIPY showed the highest PLQY (98%) and its corresponding OLED achieved a maximum external quantum efficiency (EQEmax) of 17.0% at 619 nm.
  • The DBF-BODIPY based OLED demonstrated a long operational lifetime (LT90) of 152 hours at 5000 cd/m².

Conclusions:

  • Novel BODIPY derivatives with tunable deep-red emission and narrow fwhm have been successfully developed.
  • These emitters show great potential for applications in high-performance OLEDs, particularly for meeting stringent color standards.
  • The study highlights the effectiveness of strategic substituent modification on BODIPY core for advanced optoelectronic applications.