Titania is one of the key materials used in 1D, 2D, and 3D nanostructures as electron transport media in energy conversion devices. In the present study, it is shown that the electronic properties of TiO₂ nanotubes can be drastically improved by inducing a nanotwinned grain structure in the nanotube wall. This structure can be exclusively induced for “single‐walled” nanotubes with a high‐temperature treatment in pure oxygen atmospheres. Nanotubes with a twinned grain structure within the tube wall show a strongly enhanced conductivity and photogenerated charge transport compared to classic nanotubes. This remarkable improvement is exemplified in the electronic properties by using nanotwinned TiO₂ nanotubes in dye‐sensitized solar cells where a significant increase in efficiency of up to 10.2% is achieved.

中文翻译：

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在TiO2纳米管中诱导纳米孪晶结构，增强了电子传输，DSSC效率提高了10％以上

二氧化钛是1D，2D和3D纳米结构中用作能量转换设备中电子传输介质的关键材料之一。在本研究中，表明通过在纳米管壁中诱导纳米孪晶的晶粒结构可以大大提高TiO ₂纳米管的电子性能。这种结构可以通过在纯氧气氛中进行高温处理而专门用于“单壁”纳米管。与经典纳米管相比，在管壁内具有孪生晶粒结构的纳米管显示出大大增强的电导率和光生电荷传输。通过使用纳米孪晶TiO ₂，电子性能得到了显着改善。 染料敏化太阳能电池中的纳米管可实现高达10.2％的效率显着提高。