Two Sizes CdSe Quantum Dots Co-Sensitized TiO2-Nano-SiO2 Hybrid Photoelectrodes for Solar Cells Applications

Ren Bao Wang; Hai Hong Niu; Lei Wan

doi:10.4028/www.scientific.net/KEM.575-576.3

Paper Titles

Foreword, Committee and Sponsors

Two Sizes CdSe Quantum Dots Co-Sensitized TiO₂-Nano-SiO₂ Hybrid Photoelectrodes for Solar Cells Applications
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HomeKey Engineering MaterialsKey Engineering Materials Vols. 575-576Two Sizes CdSe Quantum Dots Co-Sensitized...

Two Sizes CdSe Quantum Dots Co-Sensitized TiO₂-Nano-SiO₂ Hybrid Photoelectrodes for Solar Cells Applications

Abstract:

The high-quality two sizes CdSe quantum dots (QDs) with nearly monodisperse size and shape were synthesized by the employed hot injection method with some modifications. The nanoparticles diameters were to be 2.6nm and 3.0nm respectively. To improve crystallization property and specific surface area of TiO₂ and to inhibit recombination processes of photoinduced electrons effectively, TiO₂-nano-SiO₂ hybrid films were prepared by adding proper meso-porous SiO₂ into TiO₂, in which the mass ratio of SiO₂ to TiO₂ was 5%. CdSe QDs were linked to TiO₂-nano-SiO₂ films using 3-mercaptopropionic acid to increase CdSe QDs adsorption. Two sizes CdSe QDs were achieved both to promote charge separation and to ensure the porper mobile pathway of free carriers. The J-V characterization showed that two sizes CdSe QDs co-sensitized TiO₂-nano-SiO₂ hybrid photoelectrodes had higher short circuit current density (J_SC) and open circuit voltage (V_OC), compared to one size CdSe QDs.

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Key Engineering Materials (Volumes 575-576)

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3-6

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.575-576.3

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Online since:

September 2013

Authors:

Ren Bao Wang, Hai Hong Niu, Lei Wan

Keywords:

CdSe Quantum Dots, Solar Cell, TiO₂-Nano-SiO₂Hybrid Photoelectrodes

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