Stability comparison: A PCDTBT/PC 71BM bulk-heterojunction versus a P3HT/PC 71BM bulk-heterojunction

Dong Hwan Wang, Jung Kyu Kim, Jung Hwa Seo, O. Ok Park, Jong Hyeok Park

Research output: Contribution to journalArticlepeer-review

51 Scopus citations

Abstract

In this study, the physical and chemical degradation behaviors of active layers based on semicrystalline p-type polymer (poly(3-hexylthiophene) (P3HT)) and [6,6]-phenyl C 71 butyric acid methyl-ester (PC 71BM) are compared with the corresponding behaviors of amorphous p-type polymer of poly[N-9″-hepta-decanyl-2,7-carbazole-alt-5,5-(4′, 7′-di-2-thienyl-2′,1′,3′-benzothiadiazole)] (PCDTBT) and PC 71BM. A surface morphological study of the active layer (from Atomic force microscopy (AFM) and scanning electron microscopy (SEM) images) and a chemical analysis (from X-ray photoelectron spectroscopy (XPS) and Energy dispersive X-ray spectroscopy (EDS) results) help explain why PCDTBT/PC 71BM bulk heterojunction (BHJ) has a higher level of long-term stability under thermal and air stability experimental conditions than a P3HT/PC 71BM-based BHJ. The power conversion efficiency for a PCDTBT/PC 71BM BHJ cell and a P3HT/PC 71BM BHJ cell decreased by 11% and 21%, respectively, after a thermal stability test and by 68% and 78%, respectively, after a 300 h air stability test.

Original languageEnglish
Pages (from-to)249-255
Number of pages7
JournalSolar Energy Materials and Solar Cells
Volume101
DOIs
StatePublished - Jun 2012

Keywords

  • Air stability
  • Bulk heterojunction (BHJ)
  • Degradation
  • Morphological change
  • Polymer solar cells
  • Thermal stability

Fingerprint

Dive into the research topics of 'Stability comparison: A PCDTBT/PC 71BM bulk-heterojunction versus a P3HT/PC 71BM bulk-heterojunction'. Together they form a unique fingerprint.

Cite this