Surface Passivation of Nanoporous TiO2 via Atomic Layer Deposition of ZrO2 for Solid-State Dye-Sensitized Solar Cell Applications

被引：137

作者：

Li, Tina C. ^{[2
,3
]}

Goes, Marcio S. ^{[1
,4
]}

Fabregat-Santiago, Francisco ^{[1
]}

Bisquert, Juan ^{[1
]}

Bueno, Paulo R. ^{[4
]}

Prasittichai, Chaiya ^{[2
,3
]}

Hupp, Joseph T. ^{[2
,3
]}

Marks, Tobin J. ^{[2
,3
]}

机构：

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

[2] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA

[3] Northwestern Univ, Argonne NW Solar Energy Res Ctr, Evanston, IL 60208 USA

[4] Univ Estadual Paulista, Inst Quim Araraquara, Dept Fis Quim, BR-14800900 Araraquara, SP, Brazil

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 42期

关键词：

CHARGE RECOMBINATION; ELECTRON-DIFFUSION; INSULATING OXIDE; THIN-LAYER; EFFICIENCY; SEMICONDUCTORS; PERFORMANCE; CONVERSION; NANOCOMPOSITE; CAPACITANCE;

D O I：

10.1021/jp906573w

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：

We report here the utilization of atomid layer deposition to passivate surface map states in mosoporous TiO2 nanoparticles for solid state dye sensitized solar cells based on 9,9'-spirobifluorene (spiro-OMeTAD). By depositing ZrO2 films with angstrom-level precision, coating the mesoporous TiO2 produces over a two-fold enhancement in short-circuit current density, as compared to a control device. Impedance spectroscopy measurements provide evidence that the ZrO2 coating reduces recombination lossed at the TiO2/spiro-OMeTAD interface and passivates localized surface states. Low-frequency negative capacitances, frequently observed in nanocomposite solar cells, have been associated with the surface-state mediated charge transfer from TiO2 to the spiro-OMeTAD.

引用

页码：18385 / 18390

页数：6

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