Abstract
In this study, a novel three-layer photoanode with TiO2 nanoparticles (P25) as the underlayer, TiO2 nanotube (TNT) arrays as the interlayer and the hollow TiO2 boxes (TiO2-HB) as overlayer film have been fabricated for application in dye sensitized solar cells (DSSCs). The TiO2-HB was introduced as light-scattering layer due to the hollow structure in DSSCs, which increases the transmission distance of light in the TiO2 nanostructure photoanode and enhances light harvesting efficiency. It was obviously that the three-layer film photoanode cell achieved the higher conversion efficiency and attained the value of 6.03 %, which is 20.6 % higher than the double-layer film cell (η = 5.01 %)that of the P25 particles film as the underlayer and TNT arrays as the overlayer film under simulated AM 1.5 sunlight (constant irradiation of 100 mWcm−2).
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