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Heat sink assisted elevated temperature sintering process of TiO2 on polymer substrates for producing high performance flexible dye-sensitized solar cells
Chemical Engineering and Processing: Process Intensification ( IF 4.3 ) Pub Date : 2020-01-23 , DOI: 10.1016/j.cep.2020.107817
K. Gireesh Baiju , B. Murali , R. Subba Rao , K. Jayanarayanan , Duraisamy Kumaresan

We report a plate fin heat sink assisted elevated temperature sintering of TiO2 pastes doctor-bladed onto the indium tin oxide coated polyethylene terephthalate (ITO PET) substrates to function as photoanodes in the fabrications of flexible dye sensitized solar cells (DSSCs). In this process, sintering through a convective heat transfer has been employed to heat the pastes of TiO2 nanoparticles and its composite coated onto the ITO PET substrates at an elevated temperature up to 250 °C without the thermal decomposition and loss of integrity of PET polymer and then used in the preparation of flexible DSSC photoanodes. The TiO2 composite flexible photoanode in the DSSCs has produced a maximum power conversion efficiency (PCE) of 4.11 ± 0.32 % with an open circuit voltage (Voc) of 0.77 V. These values are found higher than the PCE and Voc values reported for the ITO PET based flexible DSSCs processed by various high pressure compression methods. Besides, the mechanical stability studies of flexible DSSC photoanodes prepared by this method have shown only less than 9 % decrease in the PCE values after 30 bending cycles, indicating good mechanical stability and adhesion between the TiO2 films and ITO PET substrates.



中文翻译:

TiO 2在聚合物基板上的散热辅助高温烧结工艺,用于生产高性能柔性染料敏化太阳能电池

我们报告了板翅片散热器辅助刮刀刮涂到氧化铟锡涂层的聚对苯二甲酸乙二醇酯(ITO PET)基板上的TiO 2糊剂的高温烧结,以在制造柔性染料敏化太阳能电池(DSSC)中用作光阳极。在此过程中,通过对流传热进行烧结,可将TiO 2纳米颗粒及其复合材料的糊料在高达250°C的高温下加热到ITO PET基材上,而不会发生热分解和PET聚合物完整性的损失然后用于制备柔性DSSC光阳极。TiO 2DSSC中的复合柔性光电阳极产生的最大功率转换效率(PCE)为4.11±0.32%,开路电压(V oc)为0.77V。发现这些值高于报道的ITO的PCE和V oc值通过各种高压压缩方法加工的基于PET的柔性DSSC。此外,通过这种方法制备的柔性DSSC光电阳极的机械稳定性研究表明,在30个弯曲循环后,PCE值仅降低了不到9%,这表明了良好的机械稳定性以及TiO 2膜与ITO PET基材之间的附着力。

更新日期:2020-01-23
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