Hierarchically-Structured NiO Nanoplatelets as Mesoscale p-Type Photocathodes for Dye-Sensitized Solar Cells

被引:48
作者
Flynn, Cory J. [1 ]
Oh, EunBi E. [1 ]
McCullough, Shannon M. [1 ]
Call, Robert W. [2 ]
Donley, Carrie L. [3 ]
Lopez, Rene [2 ]
Cahoon, James F. [1 ]
机构
[1] Univ N Carolina, Dept Chem, Chapel Hill, NC 27599 USA
[2] Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA
[3] Univ N Carolina, Dept Appl Phys Sci, Chapel Hill Analyt & Nanofabricat Lab CHANL, Chapel Hill, NC 27599 USA
关键词
HOLE TRANSPORT;
D O I
10.1021/jp5027916
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A p-type metal oxide with high surface area and good charge carrier mobility is of paramount importance for development of tandem solar fuel and dye-sensitized solar cell (DSSC) devices. Here, we report the synthesis, hierarchical morphology, electrical properties, and DSSC performance of mesoscale p-type NiO platelets. This material, which exhibits lateral dimensions of 100 nm but thicknesses less than 10 nm, can be controllably fiinctionalized with a high-density array of vertical pores 4-6, 5-9, or 7-23 nm in diameter depending on exact synthetic conditions. Thin films of this porous but still quasi-two-dimensional material retain a high surface area and exhibit electrical mobilities more than 10-fold higher than comparable films of spherical particles with similar doping levels. These advantages lead to a modest, 20-30% improvement in the performance of DSSC devices under simulated 1-sun illumination. The capability to rationally control morphology provides a route for continued development of NiO as a high-efficiency material for tandem solar energy devices.
引用
收藏
页码:14177 / 14184
页数:8
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