Carbon quantum dots (CQDs) with tuneable bandgap were prepared via a hydrothermal method using bagasse derived from industrial waste as carbon source. The CQDs exhibit a visible range absorption with excitation-dependent fluorescence emission. Using a liquid electrolyte, the photovoltaic conversion efficiency of prepared the CQDs/TiO₂ nanotubes (TNTAs) reached 1.44% with a sensitization time of 6.0 h and sensitization temperature of 100 °C, which was 13.09 times that of TNTAs. This study demonstrates the fabrication of low-cost and efficient quantum dots sensitized solar cells with a liquid electrolyte using CQDs from bagasse.

中文翻译：

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甘蔗渣衍生的碳点敏化的TiO ₂纳米管的光电性能增强

具有可调节带隙的碳量子点（CQD）是通过水热法使用工业废渣中的蔗渣作为碳源制备的。CQD表现出可见范围的吸收以及激发相关的荧光发射。使用液体电解质，制备的CQDs / TiO ₂纳米管（TNTAs）的光电转换效率达到1.44％，敏化时间为6.0 h，敏化温度为100°C，是TNTAs的13.09倍。这项研究表明，使用蔗渣中的CQD，可以利用液体电解质制造低成本，高效的量子点敏化太阳能电池。