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Abstract
Structure of silicon nanocrystal (Si NC)/semiconductor-polymer (P3HT) bulk heterojunction has been studied by using transmission FTIR and Raman spectroscopy. Chlorine-terminated Si NC (C1:Si NC) and hydrogenterminated Si NC (H:Si NC) were investigated for this purpose. In the case of Cl:Si NC and P3HT blended film, the structure of thiophene, which provides the hole transporting path, is chemically modified. As a result, hole transport property was deteriorated. Additionally, surface doping efficiency of Si NC has been studied by analyzing performance of Si NC thin film transistor. The electron mobility is improved by hydrogen termination. The results suggest that the hybrid Si NC/P3HT bulk heterojunction solar cell performance is improved greatly by hydrogen termination.
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