Investigation of supercritical fluids and its application for photovoltaic material

2015 Fiscal Year Final Research Report

• Project/Area Number: 26790015
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Nanomaterials chemistry
• Research Institution: Hiroshima University
• Principal Investigator: Kajiya Daisuke 広島大学, 自然科学研究支援開発センター, 助教 (80448258)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: 高圧力 / 振動分光 / 溶媒和 / ナノ構造 / 導電性高分子 / 配向 / 電荷輸送

Outline of Final Research Achievements

Attractive and repulsive energies between solute and solvent molecules in supercritical fluids were quantified by vibrational Raman spectroscopy and theoretical analyses, based on the perturbed hard-sphere theory, in a wide range of density or pressure. Great attractive energy was observed for the system of ester or alcohol dissolved in supercritical carbon dioxide. Using the supercritical carbon dioxide, the photovoltaic polymer thin film was prepared to improve the carrier transport property as well as the film structure. As a result, carrier mobility and carrier density were enhanced significantly by increasing the polymer crystallinity and polymer alignment in the carrier-migration direction of photovoltaics.

Free Research Field

物理化学、光物性、ナノサイエンス