研究目的
To investigate the fabrication and characteristics of polymer light-emitting devices with selectively transparent 1D photonic crystals consisting of inorganic/organic hybrid dielectric films in order to realize all-printed microlight sources with the spectral narrowing, and the strong directed emission pattern.
研究成果
The study demonstrated that selectively transparent photonic crystals consisting of printed inorganic/organic hybrid dielectric films based on inorganic CuSCN can exhibit intense Bragg peaks in the visible region. All-printed SY polymer light-emitting diodes with inorganic/organic hybrid dielectric mirrors exhibited spectral narrowing, and AC-driven polymer EL devices with mirrors showed strong directed emission patterns, indicating potential for all-printed microlight sources.
研究不足
The study is limited by the need for further optimization of the layer thicknesses and materials to achieve higher performance and the challenge of fabricating all-polymer DBR structures with high reflectivity.
1：Experimental Design and Method Selection:
The study focused on the fabrication of polymer light-emitting diodes (PLEDs) and AC-driven electroluminescent (EL) devices with dielectric film mirrors using inorganic CuSCN and organic CA or P(VDF-TrFE) as high and low refractive index materials, respectively.
2：Sample Selection and Data Sources:
The samples were fabricated on glass substrates by spin coating, with layer thicknesses controlled by varying spin speed and concentrations of the used materials.
3：List of Experimental Equipment and Materials:
Instruments included a photonic multichannel spectral analyzer (Hamamatsu Photonics, PMA-11) and a photospectrometer (Shimadzu UV-3100PC). Materials included CuSCN, CA, PVK, P(VDF-TrFE), PEDOT:PSS, SY, F8BT, and PFN.
4：Experimental Procedures and Operational Workflow:
The process involved cleaning the glass substrate, stacking alternating layers of high and low refractive index materials to form dielectric mirrors, and depositing the cathode.
5：Data Analysis Methods:
Reflectance and EL spectra were measured to analyze the performance of the devices.
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