On/off- ratio dependence of bulk hetero junction photodiodes and its impact on electro-optical properties
Organic photodiodes using PTB7:PC71BM as absorption layer have been structured and electro-optically analyzed. Improvements in the on/off-ratio are realized by changing the thickness of the absorption layer. We discuss the absorption spectra in dependence to the achieved photocurrent for the photodiodes. The ?s transient photo current response time is measured with a responsivity of 98 mA/W.
organic photodiode ptb7 pc71bm photodetector sensors