Efficiency improvement of TiO2 nanowire arrays based dye-sensitized solar cells through further enhancing the specific surface area

Efficiency improvement of TiO2 nanowire arrays based dye-sensitized solar cells through further enhancing the specific surface area
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通过进一步提高比表面积提高基于TiO2纳米线阵列的染料敏化太阳能电池的效率

DOI:
10.1016/j.jcrysgro.2018.09.047
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发表时间:
2019
期刊:
Nanostructures A1;Surface structure A1; Surface processes B1; Oxides B2; Semiconducting materials B
影响因子:
--
通讯作者:
zhao liancheng
zhao liancheng
中科院分区:
其他
文献类型:
--
作者:
ni shiming;wang dongbo;guo fengyun;jiao shujie;zhang yong;wang jinzhong;wang bao;yuan lifeng;zhang li;zhao liancheng

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采用简单的溶剂热法制备了金红石型单晶TiO2纳米线阵列。与表面光滑的TiO_2纳米粉体相比,表面粗糙的TiO_2纳米粉体具有较大的比表面积,更有利于染料的吸收,而染料的吸收与染料敏化太阳能电池的光电转换效率密切相关。以粗糙表面TiO_2纳米粉体为基质的DSSC的光电转换效率可达8.28%。延长刻蚀时间可以提高TiO2纳米水玻璃的比表面积,但同时由于阳极与电解液接触面积的增大,导致光生电子复合增加,从而降低了DSSC的光电转换效率。此外,与光散射层组合,基于粗糙表面金红石TiO2 NWA的DSSC的性能可以进一步增强,达到令人印象深刻的9.39%的PCE,这是迄今为止基于金红石TiO2 NWA的DSSC的显著转换效率。
Vertically aligned nanowire arrays (NWAs) assembled by monocrystalline rough-surface rutile TiO2 nanowires.have been prepared by simple solvothermal methods. Compared with smooth-surface TiO2 NWAs, the large.specific surface area of rough-surface TiO2 NWAs is more beneficial to dye absorption which is closely related to.the photoelectric conversion efficiency (PEC) of dye-sensitized solar cells (DSSCs). The PEC of DSSCs based on.the rough-surface TiO2 NWAs we prepared could reach 8.28%. Prolonging the etching treatment time could.increase the specific surface area of TiO2 NWAs, but meanwhile the increased photogenerated electron recombination.caused by more contact area between photoanode and electrolyte would decrease the PEC of.DSSCs. Furthermore, in combination with a light-scattering layer, the performance of the rough-surface rutile.TiO2 NWAs based DSSC can be further enhanced, reaching an impressive PCE of 9.39%, which is a remarkable.conversion efficiency for DSSCs based on rutile TiO2 NWAs heretofore.
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