研究目的
Investigating the use of thermally activated delayed ?uorescence (TADF) emitters for organic light-emitting diodes, focusing on charge balance, concentration quenching, and exciton con?nement to achieve high efficiency.
研究成果
The study demonstrated a simple, essentially two-layer device structure for the red-orange TXO-TPA emitter, achieving a maximum EQE of 9.75%. This work can influence the use of red-orange TADF emitters for large-area display and lighting applications.
研究不足
The study acknowledges the challenges in achieving a full understanding of the TADF mechanism and improving the stability of devices containing TADF materials. The simplified structure used cannot allow a very high EQE but aims for practical applications.
1：Experimental Design and Method Selection:
The study focused on developing a simple structured OLED with a mixed host consisting of a polymer PVK and a high triplet p-type mCP for the red-orange TXO-TPA OLED, in a conventional p?n two-layer structure.
2：Sample Selection and Data Sources:
The devices were fabricated with different doping concentrations of TADF, i.e., 5, 8, and 10 wt % and different ETL layer thicknesses.
3：List of Experimental Equipment and Materials:
Materials included TXO-TPA, PVK, mCP, TmPyPB, PEDOT:PSS, and LiF. Equipment included a Keithley source meter, Minolta LS-100 Chromameter, Ocean Optics USB4000 spectrometer, and Park Systems XE7 Atomic force microscope.
4：Experimental Procedures and Operational Workflow:
The devices were fabricated by spin-coating and vacuum deposition methods, followed by characterization of their optical, electrical, and morphological properties.
5：Data Analysis Methods:
The electrical mobility was estimated using the Mott?Gurney I?V model, and device performance was evaluated based on current density?voltage?luminescence, EL spectrum, and efficiencies.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
