Abstract
Doping with foreign atoms is an efficient way to enhance the electrochromic performance of the pristine single material. In this work, N-doped TiO2-B nanotube films were successfully prepared via hydrothermal approach combined with ion exchange method. The nitrogen doped TiO2-B nanotube film shows good electrochromic performance and cyclic stability. At 633 nm and −1.6 V, the optical modulation amplitude of the nitrogen doped TiO2-B film can reach 76%, which is higher than pristine TiO2-B film (64%). The coloring efficiency of the nitrogen doped samples is 35.38 cm2/C which is higher than pure TiO2-B (21.72 cm2/C). Such good performance can be ascribed to the increase of the TiO2-B electrical conductivity caused by the doping of N species.
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