Increased light harvesting in dye-sensitized solar cells with energy relay dyes

被引:398
作者
Hardin, Brian E. [1 ,2 ]
Hoke, Eric T. [1 ]
Armstrong, Paul B. [3 ]
Yum, Jun-Ho [2 ]
Comte, Pascal [2 ]
Torres, Tomas [4 ,5 ]
Frechet, Jean M. J. [3 ]
Nazeeruddin, Md Khaja [2 ]
Graetzel, Michael [2 ]
McGehee, Michael D. [1 ]
机构
[1] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA
[2] Ecole Polytech Fed Lausanne, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland
[3] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA
[4] Univ Autonoma Madrid, Fac Ciencias, Dept Quim Organ C1, E-28049 Madrid, Spain
[5] Univ Autonoma Madrid, Fac Ciencias, Dept Fis Mat C4, E-28049 Madrid, Spain
基金
美国国家科学基金会;
关键词
NANOCRYSTALLINE TIO2 FILMS; TITANIUM-DIOXIDE FILMS; CHARGE RECOMBINATION KINETICS; ELECTRON INJECTION; PHOTOVOLTAIC CELLS; CONVERSION; EFFICIENCY; SEPARATION; MECHANISM; SUNLIGHT;
D O I
10.1038/NPHOTON.2009.96
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Conventional dye-sensitized solar cells have excellent charge collection efficiencies, high open-circuit voltages and good fill factors. However, dye-sensitized solar cells do not completely absorb all of the photons from the visible and near-infrared domain and consequently have lower short-circuit photocurrent densities than inorganic photovoltaic devices. Here, we present a new design where high-energy photons are absorbed by highly photoluminescent chromophores unattached to the titania and undergo Forster resonant energy transfer to the sensitizing dye. This novel architecture allows for broader spectral absorption, an increase in dye loading, and relaxes the design requirements for the sensitizing dye. We demonstrate a 26% increase in power conversion efficiency when using an energy relay dye (PTCDI) with an organic sensitizing dye (TT1). We estimate the average excitation transfer efficiency in this system to be at least 47%. This system offers a viable pathway to develop more efficient dye-sensitized solar cells.
引用
收藏
页码:406 / 411
页数:6
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