Failure mechanism for flexible dye-sensitized solar cells under repeated outward bending: Cracking and spalling off of nano-porous titanium dioxide film

He, Xue-Long, Yang, Guan-Jun, Li, Chang-Jiu, Liu, Mei and Fan, Sheng-Qiang (2015) Failure mechanism for flexible dye-sensitized solar cells under repeated outward bending: Cracking and spalling off of nano-porous titanium dioxide film. Journal of Power Sources, 280 182-189. doi:10.1016/j.jpowsour.2015.01.088


Author He, Xue-Long
Yang, Guan-Jun
Li, Chang-Jiu
Liu, Mei
Fan, Sheng-Qiang
Title Failure mechanism for flexible dye-sensitized solar cells under repeated outward bending: Cracking and spalling off of nano-porous titanium dioxide film
Journal name Journal of Power Sources   Check publisher's open access policy
ISSN 0378-7753
1873-2755
Publication date 2015-04-15
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.jpowsour.2015.01.088
Volume 280
Start page 182
End page 189
Total pages 8
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Collection year 2016
Language eng
Formatted abstract
Flexibility, as well as efficiency, of flexible dye-sensitized solar cells (DSCs) is of significant importance to their applications. In this study, quantitative bending test, carried out with a lab-developed solar cell bending tester, is used to simulate the flexible service condition. The photovoltaic performance, morphology of the photoanode and electrochemical property evolution during bending service are examined to aim at understanding the bending failure mechanism for the flexible DSCs under repeated outward bending (the TiO2 film in the photoanode is in tension). Results show that when the bending radius is 12 mm, the efficiency of the plastic DSCs keeps unchanged with increasing the bending cycle. When the bending radius is smaller than 12 mm, the efficiency of the flexible DSCs decreases with increasing the bending cycle. The electrochemical impedance spectroscopy results show that the increase of the electron transport resistance (Rt) in TiO2 network is responsible for the degradation of efficiency. Furthermore, the photoanodes after repeated bending is cracking and spalling off from the ITO surface. Finally, a failure model for the flexible DSCs under repeated outward bending is proposed.
Keyword Dye-sensitized solar cells
Failure mechanism
Electrochemical impedance spectroscopy
Outward bending
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
School of Chemistry and Molecular Biosciences
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 5 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 6 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Tue, 03 Feb 2015, 10:17:36 EST by System User on behalf of Scholarly Communication and Digitisation Service