Special Section on Organic Photovoltaics

Degradation of phenyl C61 butyric acid methyl ester: poly (3-hexylthiophene) organic photovoltaic cells and structure changes as determined by defect investigations

[+] Author Affiliations
Thien-Phap Nguyen, Frederic Reisdorffer

University of Nantes, Institut des Matériaux Jean Rouxel, CNRS, 2 rue de la Houssinière, 44322 Nantes Cedex3, France

Cedric Renaud

University of Bordeaux 1, Laboratoire de Chimie des Polymères Organiques, 16 avenue Pey Berland, 33607 Pessac, France

Leeyih Wang

National Taiwan University, Center for Condensed Matter Sciences, 1, Sec.4, Roosevelt Road, Taipei 10617, Taiwan

J. Photon. Energy. 2(1), 021013 (Sep 12, 2012). doi:10.1117/1.JPE.2.021013
History: Received September 4, 2011; Revised June 11, 2012; Accepted July 17, 2012
Text Size: A A A

Abstract.  Stability of organic photovoltaic cells is the key issue for their commercialization. Despite intensive investigations to clarify the causes of failure of devices, the process of degradation is not yet well understood. In this work, we made use of the trap measurements by the charge-based deep-level transient spectroscopy to study devices that have been aged by continuous exposure to artificial sunlight for 20 h, and we compared the trap parameters to those obtained in freshly prepared samples. With regard to poly (3-hexylthiophene) (P3HT)-based devices, the P3HT:phenyl C61 butyric acid methyl ester blend cells showed an additional deep trap level and a higher trap density. In the degraded devices, all the existing traps in the fresh sample were found, and there was no creation of additional defect levels. The density of several trap levels in the polymer was strongly reduced after aging. Analysis of the results suggests that a phase separation in the photoactive blend has occurred, leading to a better organization of the polymer domains to lower defect states.

Figures in this Article
© 2012 Society of Photo-Optical Instrumentation Engineers

Citation

Thien-Phap Nguyen ; Cedric Renaud ; Frederic Reisdorffer and Leeyih Wang
"Degradation of phenyl C61 butyric acid methyl ester: poly (3-hexylthiophene) organic photovoltaic cells and structure changes as determined by defect investigations", J. Photon. Energy. 2(1), 021013 (Sep 12, 2012). ; http://dx.doi.org/10.1117/1.JPE.2.021013


Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

PubMed Articles
Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.