Efficient bulk heterjunction solar cells based on a low-bandgap polyfluorene copolymers and fullerene derivatives

Jen Hsien Huang, Kuang Chieh Li, Hung Yu Wei, Po Yen Chen, Lu Yin Lin, Dhananjay Kekuda, Hong-Cheu Lin, Kuo Chuan Ho, Chih Wei Chu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

A low-bandgap polymer (PF-PThCVPTZ) consisted of fluorene and phenothiazine was designed and synthesized. With the donor-acceptor segment, the partial charge transfer can be built in the polymer backbone leading to a wide absorbance. The absorption spectrum of PF-PThCVPTZ exhibits a peak at 510 nm and an absorption onset at 645 nm in the visible range. As blended with [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) as an electron acceptor, narrow bandgap PF-PThCVPTZ as electron donor shows significant solar cell performance. Under AM 1.5 G, 100 mA/cm2 illumination, a power conversion efficiency (PCE) of 1.85% was recorded, with a short circuit current (JSC) of 5.37 mA/cm2, an open circuit voltage (VOC) of 0.80 V, and a fill factor (FF) of 43.0%.

Original languageEnglish
Pages (from-to)1109-1115
Number of pages7
JournalOrganic Electronics
Volume10
Issue number6
DOIs
StatePublished - 1 Jan 2009

Keywords

  • Bulk heterojunction
  • Narrow bandgap polymers
  • Phenothiazine derivative
  • Polyfluorene
  • Polymer solar cell

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