fulltext.study @t Gmail

Expanding the photoresponse range of TiO2 nanotube arrays by CdS/CdSe/ZnS quantum dots co-modification

Paper ID Volume ID Publish Year Pages File Format Full-Text
27322 44016 2011 6 PDF Available
Title
Expanding the photoresponse range of TiO2 nanotube arrays by CdS/CdSe/ZnS quantum dots co-modification
Abstract

Highly ordered TiO2 nanotube arrays modified by CdS, CdSe and ZnS quantum dots (QDs) were fabricated by using chemical bath deposition. The CdS and CdSe QDs modification expands the photoresponse range of TiO2 nanotube arrays from ultraviolet region to visible range. It is demonstrated that sequentially assembled CdS and CdSe QDs significantly improved the light harvesting ability and photocurrent efficiency, and a high incident photon to current conversion efficiency (IPCE) of 53% was obtained. Further coating the TiO2/CdS/CdSe nanotube array with a barrier layer of ZnS QD increases the IPCE to 72%. The improved photo harvest efficiency of the CdS/CdSe/ZnS co-modified TiO2 arrays is attributed to the formation of an ideal cascade-type energy band structure, which is advantageous for both electron injection and hole recovery.

► Highly ordered TiO2 nanotube arrays modified by CdS, CdSe and ZnS QDs were prepared. ► The TiO2/CdS/CdSe/ZnS photoanode exhibits an expanded photoresponse range and high IPCE. ► The improved light harvesting ability is attributed to the cascade-type energy band structure.

Keywords
TiO2 nanotube; CdS; CdSe; ZnS; Sensitization; Solar cell
First Page Preview
Expanding the photoresponse range of TiO2 nanotube arrays by CdS/CdSe/ZnS quantum dots co-modification
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 224, Issue 1, 15 November 2011, Pages 25–30
Authors
, , , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us