Creating and sharing knowledge for telecommunications

NANOSTRUCTURING DONOR/ACCEPTOR INTERFACES IN ORGANIC PHOTOVOLTAIC CELLS UTILIZING SOLUTION METHODS

Charas, A. ; Farinhas, J. ; Brotas, G. ; Ferreira, Q. ; Rodrigues, R. ; Morgado, J.

NANOSTRUCTURING DONOR/ACCEPTOR INTERFACES IN ORGANIC PHOTOVOLTAIC CELLS UTILIZING SOLUTION METHODS, Proc International Conf. on Science and Technology of Syntethic Metals - ICSM, Atlanta, United States, Vol. , pp. - , July, 2012.

Digital Object Identifier:

Abstract
We report on the fabrication and characterization of organic photovoltaic cells, OPVs, with nanostructured donor layers prepared by spin coating. The nanostructuring method is based on the phase separation in blends combining a cross-linkable -conjugated polymer and polystyrene. Insoluble columnar-grain layers of the cross-linked polymer could be obtained in the presence of a photo-acid catalyst, upon UV-illumination, and thermal annealing, followed by the polystyrene removal with tetrahydrofuran. The cross-linkable polymers were oxetane-functionalized polyfluorene-bithiophene (F8T2) and poly(3-hexylthiophene) (P3HT) derivatives. We demonstrate the control of structuring dimensions of such polymer layers and its effect on PV cells performance with PCBM as the electron acceptor.

We report on the fabrication of organic photovoltaic cells, OPVs, with nanostructured donor layers prepared by spin coating. The nanostructuring method is based on the phase separation in blends combining a cross-linkable conjugated polymer and polystyrene. Insoluble columnar-grain layers of the cross-linked polymer were obtained in the presence of a photo-acid, upon UV-illumination, and thermal annealing, followed by the polystyrene removal with tetrahydrofuran. The cross-linkable polymers were oxetane-functionalized polyfluorene-bithiophene (F8T2) and poly(3-hexylthiophene) (P3HT) derivatives. We demonstrate the control of structuring dimensions of such polymer layers and its effect on PV cells performance.