Unique Zn-doped SnO2 nano-echinus with excellent electron transport and light harvesting properties as photoanode materials for high performance dye-sensitized solar cell
Unique Zn-doped SnO2 nano-echinus with excellent electron transport and light harvesting properties as photoanode materials for high performance dye-sensitized solar cell
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独特的掺锌 SnO2 纳米海胆具有优异的电子传输和光捕获性能，可作为高性能染料敏化太阳能电池的光阳极材料
DOI：
10.1039/c2ce25954k
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发表时间：
2012-01-01
期刊：
影响因子：
3.1
通讯作者：
Zou, Zhigang
中科院分区：
文献类型：
--
作者：
Li, Zhengdao;Zhou, Yong;Zou, Zhigang
采用溶剂热法，在乙二胺/水二元溶剂体系中合成了一种独特的Zn掺杂SnO 2纳米海胆，其特征在于纳米海胆表面包覆有介孔微球。分层组装和定义明确的球体，高表面积，和掺杂锌的组合，使我们的新的纳米结构在染料敏化太阳能电池（DSSC）的光阳极应用具有良好的传输和光捕获性能的一个有趣的候选人。Zn掺杂到SnO 2框架中也引起平带电位（VFB）的负移并增加等电点。因此，染料敏化太阳能电池采用Zn掺杂的SnO 2纳米海胆光阳极表现出更高的开路光电压，更大的短路电流，更长的电子寿命，并增加染料负载比未掺杂的SnO 2同行。能量转换效率（η）为4.15%，4.95at.% Zn掺杂的SnO 2光阳极，与未掺杂的SnO 2光阳极DSSC（1.13%）相比，几乎提高了三倍。因此，Zn掺杂SnO 2纳米棘球被认为是一种非常有前途的材料，在DSSC中具有很好的应用潜力。
A unique Zn-doped SnO2 nano-echinus, characterized by nanowire-covered mesoporous spheres, was successfully synthesized in a binary ethylenediamine (En)/water solvent system using a solvothermal route. Combination of hierarchically assembled and well-defined spheres, high surface area, and doped-Zn makes our new nanostructures an interesting candidate for photoanode application in dye-sensitized solar cells (DSSCs) with excellent transport and light harvesting properties. Zn doping into the SnO2 framework also induces a negative shift in the flat-band potential (VFB) and increases the isoelectric point. Consequently, the dye-sensitized solar cell employing Zn-doped SnO2 nano-echinus photoanodes exhibit higher open-circuit photovoltages, larger short-circuit currents, longer electron lifetimes, and increased dye loading than their undoped SnO2 counterparts. The energy-conversion efficiency (η) 4.15% is achieved with 4.95 at.% Zn-doped SnO2 photoanodes, a nearly three-fold improvement compared to undoped SnO2 photoanode DSSCs (1.13%). The Zn-doped SnO2 nano-echinus is thus believed to be a very promising material, which has good potential for application in DSSCs.