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Electron injection efficiency in dye-sensitized solar cells

Paper ID Volume ID Publish Year Pages File Format Full-Text
31274 44728 2014 16 PDF Available
Title
Electron injection efficiency in dye-sensitized solar cells
Abstract

•Primary processes in dye-sensitized solar cells are discussed.•A reliable method to evaluate electron injection efficiency is proposed.•Electron injection efficiency values obtained are summarized.•Factors limiting electron injection efficiency are discussed.

Electron injection processes in dye-sensitized solar cells (DSCs), which involve electron transfer from an excited dye to a semiconductor nanoparticle, have been discussed in many previously reported studies. In this review we discuss the working principles and primary processes of DSCs, as well as these processes’ influence on basic properties of solar cells such as open-circuit voltage, short-circuit current, and incident photon-to-current conversion efficiency (IPCE). We focus our attention on the electron injection process, and we introduce methods to determine electron injection efficiency (Φinj) using time-resolved fluorescence and absorption spectroscopy techniques. We present difficulties associated with obtaining Φinj by means of such techniques, and we propose nanosecond time-resolved transient absorption spectroscopy as a reliable method. Then, Φinj values obtained are summarized. Factors limiting Φinj are discussed from the perspective of free energy changes for electron injection, the molecular structure of sensitizer dyes on the surface, and the presence of fast charge recombination pathways.

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Keywords
Dye-sensitized solar cells; Electron injection efficiency; Transient absorption spectroscopy; Free energy change; Charge recombination
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology C: Photochemistry Reviews - Volume 20, September 2014, Pages 1–16
Authors
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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