研究目的
To improve the external quantum efficiency (EQE) of solution-processable TADF-OLEDs by using multilayer hole transport layers (HTLs).
研究成果
Multilayer HTLs with TFB/PVK significantly improved the performance of solution-processable TADF-OLEDs, achieving a maximum EQE of 6.9% and the lowest turn-on voltage of 4.8V. This approach effectively balances carrier injection and reduces exciton quenching.
研究不足
The study is limited by the specific materials and fabrication techniques used, which may not be universally applicable. The performance improvements are relative to the specific configurations tested.
1：Experimental Design and Method Selection
The study focused on fabricating solution-processable TADF-OLEDs with three different HTLs: PVK, TFB, and TFB/PVK multilayer. The rationale was to compare their performance in terms of EQE, driving voltage, and luminance.
2：Sample Selection and Data Sources
The materials used included PVK, TFB, DCzDMAC-DPS as a blue emitter, and other standard OLED fabrication materials. The devices were fabricated on ITO substrates.
3：List of Experimental Equipment and Materials
Equipment included a Photo Research PR670 spectra scan spectrometer and an IVL test system. Materials included PVK, TFB, DCzDMAC-DPS, PEDOT:PSS, TPBi, LiF, and Al.
4：Experimental Procedures and Operational Workflow
The fabrication involved spin-coating PEDOT:PSS, HTLs, and EML, followed by thermal evaporation of ETL and cathode. Devices were encapsulated in N2 with UV-curable resin.
5：Data Analysis Methods
EL spectra, J-V, and L-V characteristics were measured to evaluate device performance.
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