Cu2S Reduced Graphene Oxide Composite for High-Efficiency Quantum Dot Solar Cells. Overcoming the Redox Limitations of S2-/Sn2- at the Counter Electrode

被引：440

作者：

Radich, James G. ^{[1
]}

Dwyer, Ryan ^{[2
]}

Kamat, Prashant V. ^{[1
,2
]}

机构：

[1] Univ Notre Dame, Radiat Lab, Dept Chem & Biomol Engn, Notre Dame, IN 46556 USA

[2] Univ Notre Dame, Dept Chem & Biochem, Notre Dame, IN 46556 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2011年 / 2卷 / 19期

关键词：

IONIC LAYER ADSORPTION; CDS THIN-FILMS; PHOTOELECTROCHEMICAL PROPERTIES; METAL NANOPARTICLES; CHEMICAL-DEPOSITION; PBS; SEMICONDUCTOR; SENSITIZATION; EXTRACTION; INJECTION;

D O I：

10.1021/jz201064k

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：

Polysulfide electrolyte that is employed as a redox electrolyte in quantum dot sensitized solar cells provides stability to the cadmium chalcogenide photoanode but introduces significant redox limitations at the counter electrode through undesirable surface reactions. By designing reduced graphene oxide (RGO)-Cu2S composite, we have now succeeded in shuttling electrons through the RGO sheets and polysulfide-active Cu2S more efficiently than Pt electrode, improving the fill factor by similar to 75%. The composite material characterized and optimized at different compositions indicates a Cu/RGO mass ratio of 4 provides the best electrochemical performance. A sandwich CdSe quantum dot sensitized solar cell constructed using the optimized RGO-Cu2S composite counter electrode exhibited an unsurpassed power conversion efficiency of 4.4%. SECTION: Energy Conversion and Storage

引用

页码：2453 / 2460

页数：8

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