Assertion: solar cell's efficiency | /r/HasProperty | demonstrated for polymerized ionic liquid
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text: An excellent efficiency of 7.5% was demonstrated for a polymerized ionic liquid (PIL)-based DSSC with a heterostructured photoanode consisting of 400-nm-thick organized mesoporous TiO 2 interfacial (om-TiO 2 IF) layer, 7-μm-thick nc-TiO 2 , and 1.2-μm-thick om-TiO 2 BS as the bottom, middle, and top layers, respectively, which was again much higher than that of nanocrystalline TiO 2 photoanode with an efficiency of 3.5%.