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Dye-sensitized solar cells using laser processing techniques

机译:使用激光加工技术的染料敏化太阳能电池

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摘要

Laser processing techniques, such as laser direct-write (LDW) and laser sintering, have been used to deposit mesoporous nanocrystalline TiO_2 (nc-TiO_2) films for use in dye-sensitized solar cells. LDW enables the fabrication of conformal structures containing metals, ceramics, polymers and composites on rigid and flexible substrates without the use of masks or additional patterning techniques. The transferred material maintains a porous, high surface area structure that is ideally suited for dye-sensitized solar cells. In this experiment, a pulsed UV laser (355nm) is used to forward transfer a paste of commercial TiO_2 nanopowder (P25) onto transparent conducting electrodes on flexible polyethyleneterephthalate (PET) and rigid glass substrates. For the cells based on flexible PET substrates, the transferred TiO_2 layers were sintered using an in-situ laser to improve electron paths without damaging PET substrates. In this paper, we demonstrate the use of laser processing techniques to produce nc-TiO_2 films (~10 μm thickness) on glass for use in dye-sensitized solar cells (V_(oc) = 690 mV, J_(sc) = 8.7 mA/cm~2, ff = 0.67, η = 4.0% at 100 mW/cm~2).
机译:诸如激光直接写入(LDW)和激光烧结之类的激光加工技术已用于沉积中孔纳米晶TiO_2(nc-TiO_2)膜,用于染料敏化太阳能电池。 LDW能够在刚性和柔性基板上制造包含金属,陶瓷,聚合物和复合材料的共形结构,而无需使用掩模或其他图案化技术。转移的材料保持了多孔的高表面积结构,非常适合染料敏化太阳能电池。在此实验中,使用脉冲UV激光(355nm)将市售TiO_2纳米粉(P25)的浆料向前转移到柔性聚对苯二甲酸乙二醇酯(PET)和刚性玻璃基板上的透明导电电极上。对于基于柔性PET基板的电池,使用原位激光烧结转移的TiO_2层,以改善电子路径而不损坏PET基板。在本文中,我们演示了如何使用激光加工技术在玻璃上生产用于染料敏化太阳能电池(V_(oc)= 690 mV,J_(sc)= 8.7 mA)的nc-TiO_2膜(厚度约10μm)。 / cm〜2,ff = 0.67,在100 mW / cm〜2时η= 4.0%)。

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