초록 close

We have fabricated photodetectors based on electronaccepting and electron-donating organic materials. Multiple heterojunctionsular scale. By keeping the total thickness of the devices the same, we have studied the performance of the photodetectors as a function ofthe number of such molecular-level interfaces. The results showed that the number of donoracceptor interfaces enhanced exciton dis-sociation but, at the same time, hindered charge transport by introducing energy barriers. We have shown that a trade-o between thetwo eects existed at an optimum number of donoracceptor interfaces, where the device showed better photodetector performance.