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Accelerating development of polycyclic heteroaromatic emitters with small singlet–triplet energy gaps

A simple physical model based on electronic interactions between excited configurations enables the quick and reliable prediction of singlet–triplet energy gaps in polycyclic heteroaromatic emitters. Guided by this model, organic emitters with small singlet–triplet energy gaps can be designed for applications in organic light-emitting diodes with high efficiency and colour purity.

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Fig. 1: Model for predicting ΔES1T1.

References

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This is a summary of: Walia, R. et al. Achieving small singlet–triplet energy gaps in polycyclic heteroaromatic emitters. Nat. Mater. https://doi.org/10.1038/s41563-025-02309-4 (2025).

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Accelerating development of polycyclic heteroaromatic emitters with small singlet–triplet energy gaps. Nat. Mater. 24, 1520–1521 (2025). https://doi.org/10.1038/s41563-025-02352-1

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