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首页> 外文期刊>Advanced Functional Materials >Solid-State Photovoltaic Thin Films using TiO_2, Organic Dyes, and Layer-by-Layer Polyelectrolyte Nanocomposites
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Solid-State Photovoltaic Thin Films using TiO_2, Organic Dyes, and Layer-by-Layer Polyelectrolyte Nanocomposites

机译：使用TiO_2，有机染料和层状聚电解质纳米复合材料的固态光伏薄膜

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摘要

We report photovoltaic devices consisting of patterned TiO_2, porphyrin dyes, and layer-by-layer (LBL) polyelectrolyte multi-layer/oligoethylene glycol dicarboxylic acid (OEGDA) composite films. A composite polyelectrolyte LBL/OEGDA film was fabricated by formation of an alternating multilayer of linear polyethyleneimine (LPEI) and polyacrylic acid (PAA), followed by immersion of the LBL film into an OEGDA aqueous solution. The ionic conductivity attained in this LBL LPEI/PAA and OEGDA composite film was approximately 10~(-5) S cm~(-1) at room temperature and humidity. Investigations of dye-sensitized photovoltaic devices constructed with the LBL (LPEI/PAA)/OEGDA composite films, TiO_2, and four types of porphyrin dyes resulted in optimization of the dye molecule and its orientation at the interface with the ionically conductive composite. The photocurrent value of photovoltaic devices constructed with the composite LBL/OEGDA film from illumination of a xenon white high source exhibited a nearly 1.5 times enhancement over the device without OEGDA. This enhancement of the photo-current was due to the high room-temperature ionic conductivity of the multilayer composite film. Further marked improvements of the photovoltatic performance were achieved by patterning the TiO_2 electrode using polymer stamping as a template for TiO_2 deposition. The Device with patterned TiO_2 electrodes exhibited almost 10 times larger conversion efficiencies than a similar device without patterning.
机译：我们报道了由图案化的TiO_2，卟啉染料和逐层（LBL）聚电解质多层/低聚乙二醇二羧酸（OEGDA）复合膜组成的光伏器件。通过形成线性聚乙烯亚胺（LPEI）和聚丙烯酸（PAA）的交替多层，然后将LBL膜浸入OEGDA水溶液中来制造复合聚电解质LBL / OEGDA膜。该LBL LPEI / PAA和OEGDA复合膜在室温和湿度下获得的离子电导率约为10〜（-5）S cm〜（-1）。对由LBL（LPEI / PAA）/ OEGDA复合膜，TiO_2和四种类型的卟啉染料构成的染料敏化光伏器件的研究导致染料分子的优化及其在离子导电复合物界面的取向。氙气白高光源照射下，由复合LBL / OEGDA膜构成的光伏器件的光电流值比不带OEGDA的器件提高了近1.5倍。光电流的这种增加归因于多层复合膜的高室温离子电导率。通过使用聚合物压模作为TiO_2沉积的模板对TiO_2电极进行构图，可以进一步提高光伏性能。具有图案化的TiO_2电极的器件的转换效率几乎是没有图案化的类似器件的10倍。

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