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Efficient Organic Light-Emitting Diode Through Triplet Exciton Reharvesting by Employing Blended Electron Donor and Acceptor as the Emissive Layer

Efficient Organic Light-Emitting Diode Through Triplet Exciton Reharvesting by Employing Blended Electron Donor and Acceptor as the Emissive Layer

Lu Zhang, Chao Cai, King Fai Li, Hoi Lam Tam, Kin Long Chan, Kok Wai Cheah

ACS Appl Mater Interfaces. 2015 Nov 18;7(45):24983-6.

PMID: 26529382

Abstract:

A blended bimolecular exciplex formation was demonstrated between two individual donor and acceptor molecules, which are tris(4-carbazoyl-9-ylphenyl)amine (TCTA) and 2,4,6-tris(3'-(pyridin-3-yl)biphenyl-3-yl)-1,3,5-triazine (Tm3PyBPZ). The photoluminescence spectrum of the exciplex in the solid state showed an emission with a peak around 514 nm (∼2.49 eV). By applying this exciplex as an emitting layer, a highly efficient all-fluorescent organic lighting emitting diode with maximum efficiencies of 13.1% and 53.4 lm/W can be realized under an extremely low turn-on voltage of only 2.4 V. The thermally activated delayed fluorescence (TADF) process is believed to be responsible for the excellent device performance.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP139092787	Tris(4-carbazoyl-9-ylphenyl)amine		139092-78-7	Price

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