Vibronic interactions in hole-transporting molecules: An interplay with electron-hole interactions

►Vibronic couplings of TPD derivatives, CBP and TPF are studied. ► The TPF cation exhibits weak vibronic couplings. ► The effect of on-site Coulomb interaction on the vibronic couplings are investigated. ► The interaction causes the small electron-density difference on the fluorenyl group. ► This leads to the weak vibronic couplings of the TPF cation.