Hyun Joon Oh

Organic Photovoltaic Effects Using CuPc/C 60 LAYER

We have fabricated two types of photovoltaic cells using CuPc/C60layer, and studied photovoltaic effects of these devices using xenon light source. One type of device is ITO/CuPc/C60/BCP/Al and the other is ITO/PEDOT:PSS/CuPc/C60/BCP/Al. The PEDOT:PSS layer was made by spin coating, and the other organic layers were made by thermal vapor deposition. By measuring the current-voltage characteristics under an illumination intensity of light in the range of 10∼400 mW/cm2, we have obtained open-circuit voltage VOC, short-circuit current density JSC, fill factor and efficiency of the device. As the light intensity increases, the JSCincreases as well in the both devices. The VOCremains to be constant 0.31 V in the device without PEDOT:PSS layer irrespective of the light intensities. However, there is a little variation of VOCin device with PEDOT:PSS layer depending on the light intensity.