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New Cross-linkable Small Molecules as Electron-donors for Organic Photovoltaic Cells

Brotas, G. ; Farinhas, J. ; Morgado, J. ; Charas, A.

New Cross-linkable Small Molecules as Electron-donors for Organic Photovoltaic Cells, Proc Challenges in chemical Renewable Energy - ISACS12, Cambridge, United Kingdom, Vol. , pp. - , September, 2013.

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Abstract
We report on the synthesis, optical- and electrochemical properties of two new cross-linkable conjugated small molecules (1 and 2 in Scheme 1). The new materials are composed of a –conjugated core substituted with two solubilizing chains containing oxetane end-groups as cross-linkable moieties. Oxetane groups polymerize via a cationic ring opening mechanism (CROM), yielding characteristically an insoluble and highly reticulated polymeric network. Thus, morphologically stable phases may be achieved from taking advantage of the cross-linking ability of oxetane groups. In this communication, we also present results on organic photovoltaic cells utilizing the novel materials as electron-donors and implementing different conditions of cross-linking.