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This study extends adaptable range separated hybrids (RSHs) to predict molecular emission energies, including structural relaxation. The method accurately models thermally activated delayed fluorescence (TADF) emitters, aiding in designing new materials.

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Area of Science:

  • Computational Chemistry
  • Quantum Chemistry
  • Materials Science

Background:

  • Charge transfer (CT) excitations are crucial in molecular systems.
  • Predicting absorption and emission energies accurately is vital for designing new materials.
  • Thermally activated delayed fluorescence (TADF) emitters are of significant interest for optoelectronic applications.

Purpose of the Study:

  • To extend an adaptable range separated hybrids (RSHs) methodology for predicting emission energies in molecular systems.
  • To incorporate structural relaxation into the RSHs model.
  • To validate the model's accuracy for TADF emitters.

Main Methods:

  • Tuning of adaptable range separated hybrids (RSHs).
  • Inclusion of structural relaxation in calculations.
  • Application to a series of well-studied TADF emitters.

Main Results:

  • The extended RSHs methodology accurately predicts emission energies.
  • The model provides a balanced description of triplet and singlet excited states.
  • Successful application to thermally activated delayed fluorescence (TADF) emitters.

Conclusions:

  • The adaptive RSHs procedure is highly accurate for predicting emission energies.
  • The methodology holds potential for exploring excited state energy surfaces.
  • This approach can aid in the rational design of novel TADF compounds.