Organic photocouplers consisting of organic light-emitting diodes and organic photoresistors

We have fabricated one kind of organic photocoupler with organic light-emitting diode as the input unit and pentacene photoresistor as the output unit. The wavelength of the emitting light was 522 nm. The output current of the photocoupler linearly increased with its input current and the ratio of the transfer current density reached 3. When the output voltages were 60 V, the ratio of the maximum output current to the minimum output current was 150. The breakdown voltage between the input unit and the output unit was more than 10 kV and the response time of the device was about 6.5 s. We believe this kind of device is promising in the full organic optoelectronic integrated circuits. (c) 2006 American Institute of Physics.