Study On EL Devices Of The Rare Earth Complexes And Iridium Complexs

Organic light-emitting devices(OLEDs) have been attracting considerable attention as an important flat panel display technology due to their ease of production, light weight,low cost,broad visual angle,fast response time,active emitting,high brightness,high efficiency,availability for full color display and compatibility to flexible substrates,etc.This thesis is mainly focused on the optimizing procedures of fabricating devices and performance of the rare earth complexes and Iridium complexes in organic light-emitting devices.The main contents are listed as follows:1.EL study of the rare earth complexesWe fabricated a series of EL devices which used Eu(TTA)₃(Php) and Eu(PhpyR)₃(R =-C₂F5,-C₃F₇) as the guest and adjusted the EL devices' structures through selecting several host materials,controlling the thickness of the functional layer and changing the adulteration ratio.We increased different thickness of TCTA buffer layer to optimize the EL devices' performance.The study of the EL device of the complex Tb(PMIP)₃ explained the influence of different electron transporting materials and different thickness of TCTA buffer layer to the property of the device.2.EL study of the Iridium complexesWe doped a blue emission iridium complex Ir(pdt)₃ into DPPOC.After increased 2 nm TCTA buffer layer,the brightness and the power efficiency can reach 9461 cd/m² and 39.66 lm·W^-1.We fabricated highly efficient phosphorescent EL devices based on an red emission iridium complex Ir(DBQ)₂(NDBM) as the guest and the CBP as the host,the brightness and the power efficiency can reach 16310 cd/m² and 7.90 lm·W^-1.We investigated highly efficient phosphorescent EL devices based on an red emission iridium complex Ir(DBQ)₂(acac) as the guest and two green emission iridium complexes Ir(ppy)₂(CBDK) and Ir(ppy)₂(dmd) as the host material, respectively.The EL devices used Ir(ppy)₂(CBDK) as the host material gives a maximum brightness of 26890 cd/m²and a maximum power efficiency of 12.45 lm·W^-1.And 27480 cd·m^-2,23.65 lm.W^-1 for the Ir(ppy)₂(dmd).