Bulk Heterojunction Organic Photovoltaic Devices Based on Phenyl-Cored Thiophene Dendrimers

Nikos Kopidakis, William J. Mitchell, Jao Van De Lagemaat, David S. Ginley, Garry Rumbles, Sean E. Shaheen, William L. Rance

Research output: Contribution to journalArticlepeer-review

125 Scopus Citations

Abstract

Bulk heterojunction organic photovoltaic devices have been fabricated by blending phenyl-cored thiophene dendrimers with a fullerene derivative. A power conversion efficiency of 1.3% under simulated AM 1.5 illumination is obtained for a four-arm dendrimer, despite its large optical band gap of 2.1 eV. The devices exhibit an increase in short-circuit current and power conversion efficiency as the length of the arm is increased. The fill factors of the devices studied are characteristically low, which is attributed to overly uniform mixing of the blend.

Original languageAmerican English
Article number103524
Number of pages3
JournalApplied Physics Letters
Volume89
Issue number10
DOIs
StatePublished - 2006

NREL Publication Number

  • NREL/JA-520-39753

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