Date of Award
Doctor of Philosophy
Organic semiconductors have attracted much attention as alternatives to silicon based photovoltaic technology. Currently, the best power conversion efficiencies use small molecules and conjugated polymers as the active materials. These materials consist of alternating electron-rich and electron-deficient units for use as donor materials in organic photovoltaic cells, organic light emitting diodes and organic field-effect transistors. Through a better understanding of solar cell physics, improvement in device engineering as well as development of new heterocycles, further improvements in solar cell efficiencies can be made. Azoles have recently been investigated for use as electron-deficient building blocks. Incorporation of benzobisazoles and pyridalthiadiazoles as electron-deficient units for use in conjugated polymers and small molecules has shown much promise with PCE's exceeding 3% and 6% respectively. Development, synthesis and characterization, structure-property relationships, and solar cell efficiencies of polymers comprising new electron rich building blocks and electron deficient azoles for use in organic photovoltaic cells have been studied in this dissertation.
Bhuwalka, Achala, "Design and synthesis of novel heterocycles for organic semiconducting materials" (2014). Graduate Theses and Dissertations. 14123.