Photocurrent enhancement in polymer:Fullerene bulk heterojunction solar cells doped with a phosphorescent molecule

Barry P. Rand, Claudio Girotto, Alexander Mityashin, Afshin Hadipour, Jan Genoe, Paul Heremans

Research output: Contribution to journalArticle

33 Scopus citations

Abstract

We demonstrate photocurrent enhancement of up to 20% in polymer:fullerene bulk heterojunction photovoltaic cells via the incorporation of a phosphorescent dopant, without degradation in the open-circuit voltage or fill factor of the device. The enhancement is shown to originate from multiple sources. First, the phosphor is able to populate the long-lived triplet state of the polymer, leading to longer diffusion length and a larger polymer contribution. Also, there is direct absorption on the dopant leading to enhanced spectral coverage. Finally, the dopant acts as a donor site and therefore increases the fullerene signal.

Original languageEnglish (US)
Article number173304
JournalApplied Physics Letters
Volume95
Issue number17
DOIs
StatePublished - Nov 10 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Photocurrent enhancement in polymer:Fullerene bulk heterojunction solar cells doped with a phosphorescent molecule'. Together they form a unique fingerprint.

  • Cite this