Table 1 Physical properties of electron-transporting host materials.
HOMO (eV)ΔE (eV)LUMO (eV)ET (eV)
2PTPS−6.474.06−2.412.82
3PTPS−6.504.20−2.302.82
4PTPS−6.554.28−2.272.90
TPBI−6.403.30−2.702.70