Morphological evolution of the poly(3-hexylthiophene)/[6,6]-phenyl-C 61 -butyric acid methyl ester, oxidation of the silver electrode, and their influences on the performance of inverted polymer solar cells with a sol-gel derived zinc oxide electron selective layer

Meng Yueh Liu, Chin Hsiang Chang, Chih Hua Chang, Kao Hua Tsai, Jing Shun Huang, Chen Yu Chou, Ing Jye Wang, Po Sheng Wang, Chun Yu Lee, Cha Hsin Chao, Chin Liang Yeh, Chih I. Wu, Ching Fuh Lin

Research output: Contribution to journalArticle

21 Citations (Scopus)


The inverted polymer solar cell (PSC) based on a sol-gel derived zinc oxide (ZnO) thin film as an electron selective layer is investigated. The device performance is improved after the fabricated device is placed in air for a few days. The improvement is attributed to the self-organization of the poly(3-hexylthiophene)/[6,6]-phenyl-C 61 -butyric acid methyl ester layer and oxidation of the silver electrode with time, resulting in a significant enhancement in the short circuit current, fill factor and open circuit voltage. The investigation shows that the inverted PSC based on ZnO thin film exhibits a high efficiency of 3.8% on the 6th day after fabrication without the use of poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate) and encapsulation.

Original languageEnglish
Pages (from-to)4964-4969
Number of pages6
JournalThin Solid Films
Issue number17
Publication statusPublished - Jun 30 2010
Externally publishedYes



  • Oxidation
  • Poly(3-hexylthiophene)
  • Polymer solar cells
  • Silver
  • Surface morphology
  • Work function
  • Zinc oxide

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

Cite this