研究目的
Investigating the efficiency enhancement routes in fluorescent TADF exciplex host OLEDs through an electro-optical device model.
研究成果
The electro-optical model successfully described the OLED's characteristics and identified key parameters for efficiency enhancement. The most influential parameters were the intersystem crossing rates and the triplet–triplet annihilation rate on the host. The model predicts an EQE of ≈42% under optimal conditions.
研究不足
The model's accuracy depends on the fitting of parameters to experimental data. The study focuses on a specific type of OLED and may not be directly applicable to other configurations.
1：Experimental Design and Method Selection:
A comprehensive electro-optical device model accounting for the full exciton dynamics including triplet harvesting and exciton quenching was used. The model parameters were fitted to multiple output characteristics of an OLED comprising a TADF exciplex host with a fluorescent emitter.
2：Sample Selection and Data Sources:
The OLEDs were fabricated with a TADF exciplex host and a fluorescent emitter. Measurements included current density–voltage–luminance characteristics, angle-dependent electroluminescence spectra, and EL decay.
3：List of Experimental Equipment and Materials:
The simulation software Setfos version 5.0 from Fluxim, Inc. was used. The OLED layer stack included materials such as TCTA, B4PYMPM, and DCJTB.
4：0 from Fluxim, Inc. was used. The OLED layer stack included materials such as TCTA, B4PYMPM, and DCJTB.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The model parameters were manually adjusted to agree with the measurements. The emission zone profile was determined from angle-dependent measurements.
5：Data Analysis Methods:
The model was used to analyze the emission zone and perform a parameter study to identify routes for efficiency enhancement.
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