POSS Induced Phase Separation In a Polymeric Photovoltaic System

Document Type

Conference Proceeding

Publication Date



Polymer Science and Engineering


Polymeric photovoltaic cells have attracted significant attention due to their ease of processability, flexibility and tunability of structure. The photoactive thin layer of polymeric photovoltaic cells generally contains a conjugated polymer as the donor and a fullerene derivative as the acceptor. Controlling the phase separation between donor and acceptor is of great importance in determining the performance of photovoltaic cells. Strategies including using nanoparticles and changing processing conditions have been widely utilized to optimize the phase separation. However, most nanoparticles utilized in the photovoltaic systems are conductive materials that are multi-disperse in size, which increases the chance of short circuiting between the electrodes. POSS molecules are monodisperse hybrid organic-inorganic nanostructured chemicals that are generally non-conductive. In this study, POSS molecules with different functional groups were incorporated into a polymeric photovoltaic active layer film to control the phase separation. POSS functionality was varied in an attempt to control the selfassembly of the donor/acceptor phases. High resolution AFM was utilized to investigate the surface morphology and phase separation. Photoactive films were also investigated using UV-vis spectroscopy and X-ray diffraction.

Publication Title

International SAMPE Technical Conference