Blue organic light-emitting diode as the electro-optical conversion device for high-speed switching applications

Luminance of about 40 mW cm(-2) with an emission peak at about 435 nm and the optical pulses of 100 MHz have been obtained front a blue organic light-emitting diode (OLED) based on the N,N'-di(naphtalen-1-yl)-N,N'-diphenylbenzidine emissive layer with the active area of 0.01 mm(2). The performance of modulation speed was improved significantly by applying the positive offset voltage in the range of lower voltages. We demonstrate that the OLEDs can be applied to the electro-optical conversion device for high-speed switching applications.