Self-assembled CdS quantum dots-sensitized TiO2 nanospheroidal solar cells: Structural and charge transport analysis

被引：64

作者：

Sudhagar, P. ^{[1
]}

Jung, June Hyuk ^{[1
]}

Park, Suil ^{[1
]}

Sathyamoorthy, R. ^{[2
]}

Ahn, Heejoon ^{[3
]}

Kang, Yong Soo ^{[1
]}

机构：

[1] Hanyang Univ, Energy Mat Lab, Dept Chem Engn, Seoul 133791, South Korea

[2] Kongunadu Arts & Sci Coll, Dept Phys, Coimbatore 641029, Tamil Nadu, India

[3] Hanyang Univ, Dept Mol Syst Engn, Seoul 133791, South Korea

来源：

ELECTROCHIMICA ACTA | 2009年 / 55卷 / 01期

关键词：

Spheroidal TiO2; DMF treatment; CdS; QDs solar cells; Charge transport; ELECTRODE;

D O I：

10.1016/j.electacta.2009.08.015

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A nanospheroidal TiO2 mesoporous layer combined with cadmium sulfide (CdS) quantum dots (QDs) as a sensitizer was firstly utilized for solar cell applications, resulting in an efficiency of 1.2% at a 1 sun condition. CdS quantum dots (similar to 18 nm) were attached to the TiO2 nanospheroidal electrode by using a chemical bath deposition technique. The influence of surface treatment using dimethyl formamide on the interconnectivity of the TiO2 nanospheroidal electrodes was investigated. The charge transport of TiO2/CdS QDs/electrolyte sandwich-type cells was characterized by electrochemical impedance spectroscopy and the device performance was compared with conventional nanospherical TiO2 (Degauusa P25) electrodes. The electrodes with nanospheroidal morphology showed better device performance than the P25 nanoparticle electrodes primarily due to both better connectivity among nanospheroidal TiO2 particles and larger mesopores, resulting in deeper penetration of the electrolyte in QD-sensitized solar cells. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：113 / 117

页数：5

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