Improved performances in light-emitting diodes based on a semiconductor TiO2 nano cluster buffer layer

Tóm tắt

Ultra-thin films of TiO2 nano clusters were fabricated and characterized by field- emission scanning electron microscopy (FE-SEM) and transmittance measurements. The x-ray spectra of the TiO2 nano crystals were also studied. The performances of the devices based on the blended conducting polymer are improved by inserting a semiconducting layer of TiO2 nano cluster into the emissive poly[9-vinylcarbarzole] (PVK)/ poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) and Al cathode. The organic light-emitting diodes (OLEDs) show high efficiency and good stability with turn-on voltage lower than 3 V and current density higher than 0.5 mA mm−2.

Từ khoá

Nano cluster, conducting polymer, blend polymer, organic light emitting diodes

Tài liệu tham khảo

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