fulltext.study @t Gmail

Substituent effect in direct ring functionalized squaraine dyes on near infra-red sensitization of nanocrystalline TiO2 for molecular photovoltaics

Paper ID Volume ID Publish Year Pages File Format Full-Text
26917 43986 2010 7 PDF Available
Title
Substituent effect in direct ring functionalized squaraine dyes on near infra-red sensitization of nanocrystalline TiO2 for molecular photovoltaics
Abstract

We have synthesized a series of novel blue colored symmetrical squaraine sensitizers with variable alkyl chain length for their application towards the fabrication of dye-sensitized solar cells (DSSCs). It has been found that an increase in the alkyl chain length substituted at N-position of indole ring exhibits enhanced electron diffusion length and electron life-time resulting in better passivation of nanocrystalline TiO2 surface leading to enhancement in the cell performance. Based on HOMO and LUMO energy measurement of squaraine dyes, it has been demonstrated that about 0.16 eV energy barrier is sufficient for electron injection from LUMO of dye to TiO2 conduction band and dye regeneration after photo-excitation. Performances of DSSCs using model squaraine dyes indicate that dodecyl alkyl substituent is optimum giving highest Voc and use of chenodeoxycholic acid along with the dye SQ-4 shows a photoconversion efficiency of 3.5% under AM 1.5 irradiation.

Keywords
Dye-sensitized solar cells; Aggregation; Surface passivation; Squarine dyes; Nanocrystalline TiO2
First Page Preview
Substituent effect in direct ring functionalized squaraine dyes on near infra-red sensitization of nanocrystalline TiO2 for molecular photovoltaics
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 214, Issues 2–3, 15 August 2010, Pages 269–275
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