Highly efficient alternating photocurrent from interactive organic–radical dimers: A novel light-harvesting mechanism for optoelectronic conversion

Thin films of interacting dimers of 4,4′-bis(1,2,3,5-dithiadiazolyl), sandwiched by ITO and Al, exhibit an anomalous transient current, due to a significant imbalance between the hole and electron mobilities and bulk polarization. We propose a new operational principle for organic optoelectronic conversion systems, which efficiently generates alternating photocurrent without being affected by the disadvantages of organic materials, such as poor mobility.