Electron Transport and Recombination in Solid-State Dye Solar Cell with Spiro-OMeTAD as Hole Conductor

被引：414

作者：

Fabregat-Santiago, Francisco ^{[1
]}

Bisquert, Juan ^{[1
]}

Cevey, Le ^{[2
]}

Chen, Peter ^{[2
]}

Wang, Mingkui ^{[2
]}

Zakeeruddin, Shaik M. ^{[2
]}

Graetzel, Michael ^{[2
]}

机构：

[1] Univ Jaume 1, Dept Fis, Photovolta & Optoelect Devices Grp, Castellon de La Plana 12071, Spain

[2] Ecole Polytech Fed Lausanne, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2009年 / 131卷 / 02期

关键词：

IMPEDANCE SPECTROSCOPY; CHARGE RECOMBINATION; SEMICONDUCTORS; DIFFUSION; COEFFICIENT; DEVICES; ORIGIN;

D O I：

10.1021/ja805850q

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We show that electron transport mechanisms in TiO2 solid-state dye-sensitized solar cells (SDSCs) with spiro-OMeTAD as hole conductor are similar to those of high-performance DSCs with liquid electrolytes and ionic liquids. Impedance spectroscopy provides the parameters for transport and recombination at different conditions of steady state in the dark. The recombination rate is much higher in the solid solar cell, this being a main limiting step to obtain high-efficiency SDSCs. Thus, the expected gain in photovoltage, due to a lower hole Fermi level, is prevented by recombination losses. Under low potentials the transport is limited by the electron transport in the TiO2, but at high potentials spiro-OMeTAD transport resistance reduces the fill factor and hence the efficiency on high-current devices.

引用

页码：558 / 562

页数：5

共 28 条

[1] Electronic conductivity in nanostructured TiO2 films permeated with electrolyte [J].

Abayev, I ;

Zaban, A ;

Fabregat-Santiago, F ;

Bisquert, J .

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 2003, 196 (01) :R4-R6

[2] Solid-state dye-sensitized mesoporous TiO2 solar cells with high photon-to-electron conversion efficiencies [J].

Bach, U ;

Lupo, D ;

Comte, P ;

Moser, JE ;

Weissörtel, F ;

Salbeck, J ;

Spreitzer, H ;

Grätzel, M .

NATURE, 1998, 395 (6702) :583-585

[3]

Bisquert J, 2002, J PHYS CHEM B, V106, P325, DOI 10.1021/jp01194lg

[4] Chemical capacitance of nanostructured semiconductors: its origin and significance for nanocomposite solar cells [J].

Bisquert, J .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2003, 5 (24) :5360-5364

[5] Anomalous transport effects in the impedance of porous film electrodes [J].

Bisquert, J ;

Garcia-Belmonte, G ;

Fabregat-Santiago, F ;

Compte, A .

ELECTROCHEMISTRY COMMUNICATIONS, 1999, 1 (09) :429-435

[6] Interpretation of electron diffusion coefficient in organic and inorganic semiconductors with broad distributions of states [J].

Bisquert, Juan .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2008, 10 (22) :3175-3194

[7] A review of recent results on electrochemical determination of the density of electronic states of nanostructured metal-oxide semiconductors and organic hole conductors [J].

Bisquert, Juan ;

Fabregat-Santiago, Francisco ;

Mora-Sero, Ivan ;

Garcia-Belmonte, Germa ;

Barea, Eva M. ;

Palomares, Emilio .

INORGANICA CHIMICA ACTA, 2008, 361 (03) :684-698

[8] Effect of energy disorder in interfacial kinetics of dye-sensitized solar cells with organic hole transport material [J].

Bisquert, Juan ;

Palomares, Emilio ;

Quinones, Cesar A. .

JOURNAL OF PHYSICAL CHEMISTRY B, 2006, 110 (39) :19406-19411

[9] Influence of electrolyte in transport and recombination in dye-sensitized solar cells studied by impedance spectroscopy [J].

Fabregat-Santiago, F ;

Bisquert, J ;

Garcia-Belmonte, G ;

Boschloo, G ;

Hagfeldt, A .

SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2005, 87 (1-4) :117-131

[10] The origin of slow electron recombination processes in dye-sensitized solar cells with alumina barrier coatings [J].

Fabregat-Santiago, F ;

García-Cañadas, J ;

Palomares, E ;

Clifford, JN ;

Haque, SA ;

Durrant, JR ;

Garcia-Belmonte, G ;

Bisquert, J .

JOURNAL OF APPLIED PHYSICS, 2004, 96 (11) :6903-6907

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