Reticulated Heterojunctions for Photovoltaic Devices


  • This work was supported by the Office of Naval Research under Award Numbers N00014-09-01-0250 and N00014-09-1-1117, by the National Science Foundation under Award Number CHE-0936923, and by the Center for Re-Defining Photovoltaic Efficiency Through Molecule Scale Control, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0001085. The National Science Foundation (CHE-0619638) is thanked for the acquisition of an X-ray diffractometer.


original image

An organic semiconductor device is formed by the self-assembly on a transparent electrode surface. The donor (see picture; dibenzotetrathienocoronene, yellow layer) deposits as supramolecular cables, and the acceptor (C60, orange) subsequently infiltrates this network. This network provides a donor–acceptor interface that is interwoven at the nanoscale. When incorporated into a solar cell, the active layer provides large increases in power conversion efficiencies.