QUT ePrints

Characterization of electron trapping in dye-sensitized solar cells by near-IR transmittance measurements

Nguyen, T.T. Oanh , Peter, Laurence M. , & Wang, Hongxia (2009) Characterization of electron trapping in dye-sensitized solar cells by near-IR transmittance measurements. Journal of Physical Chemistry Part C, 113(19), pp. 8532-8536.

[img] Submitted Version (PDF 1MB)
Administrators only | Request a copy from author

View at publisher

Abstract

In situ near-IR transmittance measurements have been used to characterize the density of trapped electrons in dye-sensitized solar cells (DSCs). Measurements have been made under a range experimental conditions including during open circuit photovoltage decay and during recording of the IV characteristic. The optical cross section of electrons at 940 nm was determined by relating the IR absorbance to the density of trapped electrons measured by charge extraction. The value, σn = 5.4 × 10-18 cm2, was used to compare the trapped electron densities in illuminated DSCs under open and short circuit conditions in order to quantify the difference in the quasi Fermi level, nEF. It was found that nEF for the cells studied was 250 meV over wide range of illuminat on intensities. IR transmittance measurements have also been used to quantify shifts in conduction band energy associated with dye adsorption.

Impact and interest:

21 citations in Scopus
Search Google Scholar™
19 citations in Web of Science®

Citation countsare sourced monthly from Scopus and Web of Science® citation databases.

These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.

Citations counts from the Google Scholar™ indexing service can be viewed at the linked Google Scholar™ search.

ID Code: 31559
Item Type: Journal Article
Additional Information: This article is freely available from the American Chemical Society website 12 months after the publication date. See links to publisher website in this record.
Additional URLs:
Keywords: Dye-sensitized, Solar Cell, Trapping/detrapping
DOI: 10.1021/jp901213f
ISSN: 1932-7455
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Transport Properties and Non-Equilibrium Processes (030607)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ELECTRICAL AND ELECTRONIC ENGINEERING (090600) > Photodetectors Optical Sensors and Solar Cells (090605)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Engineering Systems
Copyright Owner: Copyright 2009 American Chemical Society
Deposited On: 29 Apr 2010 12:30
Last Modified: 01 Mar 2012 00:10

Export: EndNote | Dublin Core | BibTeX

Repository Staff Only: item control page