Improved performance of organic light emitting devices using triazole/ Cs2CO3/Al cathode

Jiarong Lian; Haitao Xu; Fangfang Niu; Yawei Liu; Pengju Zeng

doi:10.1117/12.843547

12 October 2009 Improved performance of organic light emitting devices using triazole/ Cs₂CO₃/Al cathode

Jiarong Lian, Haitao Xu, Fangfang Niu, Yawei Liu, Pengju Zeng

Proceedings Volume 7518, Photonics and Optoelectronics Meetings (POEM) 2009: Solar Cells, Solid State Lighting, and Information Display Technologies; 75180I (2009) https://doi.org/10.1117/12.843547
Event: Photonics and Optoelectronics Meetings 2009, 2009, Wuhan, China

Abstract

In this study, a new cathode system of triazole (TAZ)/Cs2CO3/Al has been proposed. Obvious efficiency improvement and sharp enhanced electron injection were maintained in the devices with this new cathode. TAZ owns deep the highest occupied molecular orbital (HOMO) and wide band gap, so as to block the hole leakage effectively and confine the exciton in Alq₃ emissive layer. An abrupt lowering of the vacuum level was found in the mixture of TAZ and Cs₂CO₃, which indicated that the electron injection barrier from metal cathode into Alq₃ was greatly reduced. Our experimental proved that this new cathode may have a wide application in OLEDs emitting light with short wavelength.

Citation Download Citation

Jiarong Lian, Haitao Xu, Fangfang Niu, Yawei Liu, and Pengju Zeng "Improved performance of organic light emitting devices using triazole/ Cs₂CO₃/Al cathode", Proc. SPIE 7518, Photonics and Optoelectronics Meetings (POEM) 2009: Solar Cells, Solid State Lighting, and Information Display Technologies, 75180I (12 October 2009); https://doi.org/10.1117/12.843547

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