Science Advances

Supplementary Materials

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  • Synthesis and characterization of CzBN derivatives, 5CzPh, 2DPhCzPh, 2DMeCzPh, and 3DPhCzPh.
  • fig. S1. Fluorescence and phosphorescence spectra of the CzBN derivatives.
  • fig. S2. Phosphorescence spectra of 5CzBN in toluene and acetonitrile solutions.
  • fig. S3. Arrhenius plots of the kRISC for CzBN derivatives.
  • fig. S4. Phosphorescence spectra of triphenylamine and 1,4-bis(diphenylamino)benzene in toluene solutions.
  • fig. S5. Chemical structure and energy diagram of TADF-OLED devices.
  • fig. S6. EQE as a function of luminance for 5CzBN, 3Cz2DMeCzBN, and 3Cz2DPhCzBN.
  • fig. S7. EQE–current density in the OLEDs with 5CzBN as emitter.
  • fig. S8. 1H and 13C nuclear magnetic resonance (NMR) spectra of 3Cz2DPhCzBN.
  • fig. S9. 1H and 13C NMR spectra of 3Cz2DMeCzBN.
  • fig. S10. 1H and 13C NMR spectra of 4Cz1DPhCzBN.
  • fig. S11. 1H and 13C NMR spectra of 2F3DPhCzBN.
  • fig. S12. 1H and 13C NMR spectra of 2Cz3DPhCzBN.
  • fig. S13. 1H and 13C NMR spectra of 5CzPh.
  • fig. S14. 1H and 13C NMR spectra of 2DPhCzPh.
  • fig. S15. 1H and 13C NMR spectra of 3DMeCzPh.
  • fig. S16. 1H and 13C NMR spectra of 3DPhCzPh.

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