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12 October 2009 Improved performance of organic light emitting devices using triazole/ Cs2CO3/Al cathode
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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.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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