BINDER COMPOSITION FOR DISPERSING SEMICONDUCTOR MICRO-PARTICLE

摘要

PROBLEM TO BE SOLVED: To provide a binder composition for dispersing semiconductor micro-particles usable as a material for forming a semiconductor porous film in the negative pole of a dye sensitizing type solar cell and stably ensuring high conversion efficiency.

SOLUTION: The binder composition for dispersing the semiconductor micro-particles is characterized as follows. The binder composition is composed of tetraisopropoxytitanium and an organic solvent having reactivity with the tetraisopropoxytitanium and contains a modified material modified by reacting a part of the tetraisopropoxytitanium with the organic solvent. The solid content formed by gelation exhibits an infrared absorption spectrum providing ≥1.09 peak intensity ratio represented by formula A600 cm-1/A400 cm-1(wherein, A600 cm-1represents the peak height at 600 cm-1wave number derived from TiO2; and A400 cm-1represents the peak height at 400 cm-1wave number derived from TiOH) by an IR (infrared analysis).

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