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Tuning optical absorption in pyran derivatives for DSSC

Paper ID Volume ID Publish Year Pages File Format Full-Text
26256 43943 2016 11 PDF Available
Title
Tuning optical absorption in pyran derivatives for DSSC
Abstract

•We synthesized four nobel metal free photosensitizers for DSSC.•Dyes are based on a pyran acceptor core symmetrically linked to carbazole donor groups.•Dyes show colors ranging from orange to blue, covering the most of visible spectrum.•The electronic structure of the dyes were investigated at DFT level.•DSSC based on the reported chromophores show power conversion efficiency up to 1.9%.

Four nobel metal free dyes for application as photosensitizers in DSSC have been synthesized and their chemical–physical properties characterized by UV–vis absorption spectroscopy, cyclic voltammetry and DFT theoretical computations. The dyes are based on a pyran core, functionalized with different electron acceptor groups, symmetrically linked to carbazole electron donor mojeties. The four dyes have different optical absorption properties, affording a range of colors ranging from orange to blue, covering most of the visible spectral region. All the dyes feature high molar extinction coefficient, up to a value of 1.0 × 105 L mol−1 cm−1. The dyes were used as photosensitizers in DSSC and the photovoltaic characterization of these devices was performed under simulated solar radiation. The cell performance is higher for chromophores featuring higher LUMO energies as a consequence of a better electron injection in TiO2 oxide. A maximum power conversion efficiency of 1.9% has been achieved.

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Keywords
Synthesis; Dyes; Pyran; DFT; DSSC
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 321, 1 May 2016, Pages 79–89
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