Enhanced Electron Collection Efficiency in Dye-Sensitized Solar Cells Based on Nanostructured TiO2 Hollow Fibers
Enhanced Electron Collection Efficiency in Dye-Sensitized Solar Cells Based on Nanostructured TiO2 Hollow Fibers
复制标题
DOI：
10.1021/nl904125q
复制
发表时间：
2010-05-01
期刊：
影响因子：
10.8
通讯作者：
Moser, Jacques-E.
中科院分区：
文献类型：
--
作者：
Ghadiri, Elham;Taghavinia, Nima;Moser, Jacques-E.
以天然纤维素纤维为模板制备了纳米结构的二氧化钛中空纤维。这种廉价且易于加工的材料被用于生产用于染料敏化太阳能电池的高孔光阳极，并且与由球形纳米颗粒制成的介观薄膜相比，具有显著增强的电子传输性能。特别是，在纤维形态中，光注入电子寿命增加了3-4倍，而纤维光阳极内的电子传输速率增加了一倍。在模拟AM 1.5(100 mW cm~(-2))太阳光照射下，在550 nm激发下，获得了超过95%的近乎定量的吸收光电流转换效率和7.2%的光伏功率转换效率。
Nanostructured TiO2 hollow fibers have been prepared using natural cellulose fibers as a template. This cheap and easily processed material was used to produce highly porous photoanodes incorporated in dye-sensitized solar cells and exhibited remarkably enhanced electron transport properties compared to mesoscopic films made of spherical nanoparticles. Photoinjected electron lifetime, in particular, was multiplied by 3-4 in the fiber morphology, while the electron transport rate within the fibrous photoanaode was doubled. A nearly quantitative absorbed photon-to-electrical current conversion yield exceeding 95% was achieved upon excitation at 550 nm and a photovoltaic power conversion efficiency of 7.2% reached under simulated AM 1.5 (100 mW cm(-2)) solar illumination.