Synthesis of triphenylamine based polysiloxane as a blue phosphorescent host

Abstract

Triphenylamine based polysiloxane has been successfully synthesized as a phosphorescent host. This work demonstrates that modifying triphenylamine by polysiloxane is a promising approach to improve its physical properties while maintaining its electronic properties.

Synthesis and Charge‐Transporting Properties of Dibenzothiphene Dioxide‐Based Polysiloxanes

“…Compared with PDBTSi, introduction of carbazole groups with comparatively higher molecular flexibility lowers the T g of PCzSi‐ alt ‐PDBTSi. Additionally, the amorphous nature of them can resist phase separation, which can keep the long‐term stability and uniformity of the films …”

Solution-processed blue phosphorescent OLEDs with carbazole-based polymeric host materials

“…In the same spirit, a styrene-derived poly(carbazole) (PVAK) varying from PVK by the polymeric unit gave blue PLEDs with a CE of 18.25 cd/A while using FIrpic as the dopant [52]. Investigations on carbazole-based hosts were not limited to non-conjugated polymers and polymeric hosts with a disrupted p-conjugated main chain [53][54][55] or dendrimers [56,57] also furnished high performances with FIrpic or even more blue triplet emitters.…”

Carbazole-based polymers as hosts for solution-processed organic light-emitting diodes: Simplicity, efficacy

“…However, availability of suitable polymeric hosts for blue phosphorescent dopants is still lagging far behind that of the other colors [53][54][55]. Recently, several examples of wide bandgap polymeric hosts based on a p-conjugated interrupted polymer backbone were developed [56][57][58][59]. Indeed, one major drawback of the conjugated main-chain polymers is their low bandgaps resulting from the p-electron delocalization along the polymer backbone.…”