Effect of ZnS coating on the photovoltaic properties of CdSe quantum dot-sensitized solar cells

被引：389

作者：

Shen, Qing ^{[1
,2
]}

Kobayashi, Junya ^{[1
]}

Diguna, Lina J. ^{[1
,2
]}

Toyoda, Taro ^{[1
,2
]}

机构：

[1] Univ Electrocommun, Dept Appl Phys & Chem, Tokyo 1828585, Japan

[2] Univ Electrocommun, Course Coherent Opt Sci, Tokyo 1828585, Japan

来源：

JOURNAL OF APPLIED PHYSICS | 2008年 / 103卷 / 08期

关键词：

D O I：

10.1063/1.2903059

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

CdSe quantum dots (QDs) were adsorbed onto nanostructured TiO(2) films for different times by using a chemical bath deposition method in order to produce QD-sensitized solar cells (QDSSCs). Surface modification was done by coating ZnS onto the CdSe QDs. The optical absorption and current-voltage characteristics of these devices were studied. The size of the CdSe QDs increased with increasing adsorption time, and there was an optimum CdSe adsorption time for achieving the best photovoltaic conversion efficiency. The photovoltaic properties of short-circuit current density, open-circuit voltage, and photovoltaic conversion efficiency were significantly improved after modifying the surface with ZnS. Under a solar illumination of 100 mW/cm(2), an efficiency as high as 2.02% was achieved for the CdSe QDSSCs that were made by using this method. (C) 2008 American Institute of Physics.

引用

页数：5

共 40 条

[21] Quantum dot solar cells.: Harvesting light energy with CdSe nanocrystals molecularly linked to mesoscopic TiO2 films [J].

Robel, I ;

Subramanian, V ;

Kuno, M ;

Kamat, PV .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (07) :2385-2393

[22] THEORY OF PHOTOACOUSTIC EFFECT WITH SOLIDS [J].

ROSENCWAIG, A ;

GERSHO, A .

JOURNAL OF APPLIED PHYSICS, 1976, 47 (01) :64-69

[23] High efficiency carrier multiplication in PbSe nanocrystals: Implications for solar energy conversion [J].

Schaller, RD ;

Klimov, VI .

PHYSICAL REVIEW LETTERS, 2004, 92 (18) :186601-1

[24] Photoacoustic and photo electrochemical characterization of CdSe-sensitized TiO2 electrodes composed of nanotubes and nanowires [J].

Shen, Q ;

Sato, T ;

Hashimoto, M ;

Chen, CC ;

Toyoda, T .

THIN SOLID FILMS, 2006, 499 (1-2) :299-305

[25] Study of ultrafast carrier dynamics of nanostructured TiO2 films with and without CdSe quantum dot deposition using lens-free heterodyne detection transient grating technique [J].

Shen, Q ;

Katayama, K ;

Yamaguchi, M ;

Sawada, T ;

Toyoda, T .

THIN SOLID FILMS, 2005, 486 (1-2) :15-19

[26] Characterization of nanostructured TiO2 electrodes sensitized with CdSe quantum dots using photoacoustic and photoelectrochemical current methods [J].

Shen, Q ;

Toyoda, T .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, 2004, 43 (5B) :2946-2951

[27] Photosensitization of nanostructured TiO2 with CdSe quantum dots:: effects of microstructure and electron transport in TiO2 substrates [J].

Shen, Q ;

Arae, D ;

Toyoda, T .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2004, 164 (1-3) :75-80

[28] Studies of optical absorption and electron transport in nanocrystalline TiO2 electrodes [J].

Shen, Q ;

Toyoda, T .

THIN SOLID FILMS, 2003, 438 :167-170

[29] Optical absorption, photoelectrochemical, and ultrafast carrier dynamic investigations of TiO2 electrodes composed of nanotubes and nanowires sensitized with CdSe quantum dots [J].

Shen, Qing ;

Katayama, Kenji ;

Sawada, Tsuguo ;

Yamaguchi, Masahiro ;

Toyoda, Taro .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, 2006, 45 (6B) :5569-5574

[30] TiO2 single-crystalline nanorod electrode for quasi-solid-state dye-sensitized solar cells -: art. no. 113113 [J].

Song, MY ;

Ahn, YR ;

Jo, SM ;

Kim, DY ;

Ahn, JP .

APPLIED PHYSICS LETTERS, 2005, 87 (11)

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