研究目的
Investigating the generation of highly circularly polarized light and the improvement of luminous efficiency in OLEDs using a twisted conjugated polymer structure with chiral molecules.
研究成果
Highly CP light (|gEL|=1.13) was generated for the first time using a twisted conjugated polymer structure with chiral molecules, confirming a 60% increase in luminous efficiency compared to conventional OLED structures.
研究不足
The study does not address the potential limitations in scaling up the technology for commercial production or the long-term stability of the materials used.
1：Experimental Design and Method Selection:
Used poly(9,9-di-n-octylfluorenyl-2,7-diyl)-alt-(benzo[2,1,3] thiadiazol-4,8-diyl)] (F8BT) as the conjugate polymer, doped with a right-handed chiral dopant (R5011) with a high HTP of >100/μm, as an emitting layer (EML).
2：Sample Selection and Data Sources:
Pristine films on rubbed PI were used, with and without dopant, followed by thermal annealing at 150°C above the glass transition temperature (Tg=125°C) for 10 minutes.
3：List of Experimental Equipment and Materials:
F8BT, R5011, S5011, rubbed PI alignment layer.
4：Experimental Procedures and Operational Workflow:
Films were quenched to room temperature, followed by thermal annealing to achieve uniform twisted alignment.
5：Data Analysis Methods:
The degree of circular polarizations was defined by the dissymmetry factor, gEL = 2(IL-IR)/(IL+IR), where IL and IR denote the intensities of left- and right-handed CP light, respectively.
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