The role of exciton and charge carrier diffusion in photoenhanced currents

Abstract

This work concerns the influence on photoenhanced currents of the diffusion of excitons as well as of charge carriers. It is shown that both kinds of diffusion are important for photoen. hanced currents in the case of thin samples. Experimental results obtained on tetracene layers confirm this conclusion.

Efficient photovoltaic energy conversion in tetracene-C60 based heterojunctions

“…The reason for this difference can be attributed to the phenomenon of photoenhanced current. Photoenhanced current has been observed in tetracene thin films earlier, 14 when the sample was illuminated by light with wavelength in the single-exciton range, the current was much higher than the measured dark current.…”