Coating effect of electrospun nanofibers of Nb-doped TiO2 mixed in photoelectrode of dye sensitized solar cells
Coating effect of electrospun nanofibers of Nb-doped TiO2 mixed in photoelectrode of dye sensitized solar cells
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DOI：
10.7567/jjap.53.05fb01
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发表时间：
2014-03
影响因子：
1.5
通讯作者：
Yuji Horie;Makoto Deguchi;Shirong Guo;Keisuke Aoki;T. Nomiyama
中科院分区：
文献类型：
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作者：
Yuji Horie;Makoto Deguchi;Shirong Guo;Keisuke Aoki;T. Nomiyama
将Nb掺杂TiO 2（TNO）的静电纺丝纳米纤维（NF）作为导电剂添加到染料敏化太阳能电池中的TiO 2介孔层中。为了通过降低纳米纤维中组成纳米颗粒之间的晶界势垒来提高纳米纤维中载流子的迁移率，通过改变沉积时间td的脉冲激光沉积，在TNO-NFs表面涂覆薄的TNO层。结果表明，当td ≤ 5 min时，晶粒间空间首先被填充，载流子扩散速度vD提高了10倍以上。由于在td > 10 min时，Jsc显示出增加了约15%，而vD和电子寿命τe降低，因此认为促进了从染料/TiO 2纳米颗粒到TNO-NF的载流子注入。
Electrospun nanofibers (NFs) of Nb doped TiO2 (TNO) were added as a conductive agent to TiO2 mesoporous layer in dye sensitized solar cells. In order to improve the mobility of carriers in NFs by reducing the barrier at grain boundaries among constituent nanoparticles in NFs, the surface of TNO-NFs was coated with a thin TNO layer by pulsed laser deposition with changing the deposition time td. It was found that the inter-grain space was filled first at td ≤ 5 min, and the diffusion velocity vD of carriers was increased by more than 10 times. Since Jsc showed an increase of ∼15% while vD and the electron lifetime τe decreased at td > 10 min, the carrier injection from dye/TiO2 nanoparticles to TNO-NFs was considered to be promoted.