Organic Light-Emitting Diodes Driven by Organic Transistors

Organic thin-film field-effect transistors (OTFTs) with pentacene as the semiconductor have been fabricated for driving an organic light-emitting diode (OLED). The driving circuit includes two OTFTs and one storage capacitor. The field-effect mobility of the transistors in the driving circuit is more than 0.3 cm²/Vs, and the on/off ratio is larger than 10⁴. The light-emission area of the OLED is 0.04 mm² and the brightness is larger than 400 cd/m² when the selected line voltage, data line voltage and drive voltage all are -40 V. The responding characteristics and holding characteristics are also researched when the selected line voltage and the date line voltage are changed.