Dye sensitization of nanocrystalline TiO2:: enhanced efficiency of unsymmetrical versus symmetrical squaraine dyes

被引：161

作者：

Alex, S ^{[1
]}

Santhosh, U ^{[1
]}

Das, S ^{[1
]}

机构：

[1] CSIR, Reg Res Lab, Photosci & Photon Div, Trivandrum 695019, Kerala, India

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2005年 / 172卷 / 01期

关键词：

dye sensitization; solar cells; squaraine dyes; aggregation; nanocrystalline TiO2;

D O I：

10.1016/j.jphotochem.2004.11.005

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 series of novel symmetrical and unsymmetrical squaraine dyes have been synthesized and their comparative efficiencies as photosensitizers in dye sensitized solar cells (DSSCs) containing nanocrystalline TiO2 photoelectrodes have been investigated. DSSCs employing unsymmetrical squaraines as sensitizers produced photocurrent with much higher efficiencies compared to DSSCs containing symmetrical squaraines. Aggregation of the dyes on the TiO2 nanocrystalline electrode was observed to adversely affect the sensitization properties of symmetrical squaraines, whereas efficient sensitization was observed from both the monomeric and aggregated forms of the unsymmetrical squarames. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：63 / 71

页数：9

共 37 条

[1] AN MNDO AND CNDO/S(S + DES CI) STUDY ON THE STRUCTURAL AND ELECTRONIC-PROPERTIES OF A MODEL SQUARAINE DYE AND RELATED CYANINE [J].

BIGELOW, RW ;

FREUND, HJ .

CHEMICAL PHYSICS, 1986, 107 (2-3) :159-174

[2] SYNTHESES AND LINEAR AND NONLINEAR-OPTICAL PROPERTIES OF UNSYMMETRICAL SQUARAINES WITH EXTENDED CONJUGATION [J].

CHEN, CT ;

MARDER, SR ;

CHENG, LT .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1994, 116 (07) :3117-3118

[3] Ultrafast electron injection: Implications for a photoelectrochemical cell utilizing an anthocyanin dye-sensitized TiO2 nanocrystalline electrode [J].

Cherepy, NJ ;

Smestad, GP ;

Gratzel, M ;

Zhang, JZ .

JOURNAL OF PHYSICAL CHEMISTRY B, 1997, 101 (45) :9342-9351

[4] PHOTOCHEMISTRY OF SQUARAINE DYES .6. SOLVENT HYDROGEN-BONDING EFFECTS ON THE PHOTOPHYSICAL PROPERTIES OF BIS(BENZOTHIAZOLYLIDENE)SQUARAINES [J].

DAS, S ;

THOMAS, KG ;

RAMANATHAN, R ;

GEORGE, MV ;

KAMAT, PV .

JOURNAL OF PHYSICAL CHEMISTRY, 1993, 97 (51) :13625-13628

[5] PHOTOCHEMISTRY OF SQUARAINE DYES .8. PHOTOPHYSICAL PROPERTIES OF CROWN-ETHER SQUARAINE FLUOROIONOPHORES AND THEIR METAL-ION COMPLEXES [J].

DAS, S ;

THOMAS, KG ;

THOMAS, KJ ;

KAMAT, PV ;

GEORGE, MV .

JOURNAL OF PHYSICAL CHEMISTRY, 1994, 98 (37) :9291-9296

[6] Aggregation behavior of water soluble bis(benzothiazolylidene)squaraine derivatives in aqueous media [J].

Das, S ;

Thomas, KG ;

Thomas, KJ ;

Madhavan, V ;

Liu, D ;

Kamat, PV ;

George, MV .

JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (43) :17310-17315

[7]

DAS S, 1997, MOLEC AND SUPRA PHOT, V1, P467

[8] Photoelectrochemical cells [J].

Grätzel, M .

NATURE, 2001, 414 (6861) :338-344

[9] Dye-sensitized solar cells [J].

Grätzel, M .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS, 2003, 4 (02) :145-153

[10] Molecular photovoltaics [J].

Hagfeldt, A ;

Grätzel, M .

ACCOUNTS OF CHEMICAL RESEARCH, 2000, 33 (05) :269-277

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