Abstract

The integration of the top-emitting organic light-emitting diode(OLED) driven by the organic thin film transistor(OTFT) was investigated. The OTFT operating voltage is decreased via reducing the thickness of the gate insulator layer. OLED adopts standard devices structure with green emission and employs the thin Al film as transparent cathode to realize top-emission. The integration of low-voltage operation OTFT and top-emitting OLED is achieved,while the threshold voltage of the OTFT is 2. 0 V and the saturation field effect mobility is 0. 40 cm2·V- 1·s- 1. Based on the experimental data,the electrical characteristic of the integrated pixel is calculated and analyzed. Under the control of gate voltage from- 5 to- 10 V,the linear gray-scale control can be realized within the range of pixel brightness from 50 to 250 cd /m2.

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