Charge-carrier dynamics in hybrid plasmonic organic solar cells with Ag nanoparticles

Mei Xue, Lu Li, Bertrand J. Tremolet De Villers, Huajun Shen, Jinfeng Zhu, Zhibin Yu, Adam Z. Stieg, Qibing Pei, Benjamin J. Schwartz, Kang L. Wang

Research output: Contribution to journalArticlepeer-review

126 Citations (Scopus)

Abstract

To understand the effects of Ag nanoparticles (NPs) on the performance of organic solar cells, we examined the properties of hybrid poly(3-hexylthiophene) :[6,6]-phenyl- C61 -butyric-acid-methyl-ester:Ag NP solar cells using photoinduced charge extraction with a linearly increasing voltage. We find that the addition of Ag NPs into the active layer significantly enhances carrier mobility but decreases the total extracted carrier. Atomic force microscopy shows that the Ag NPs tend to phase segregate from the organic material at high concentrations. This suggests that the enhanced mobility results from carriers traversing Ag NP subnetworks, and that the reduced carrier density results from increased recombination from carriers trapped on the Ag particles.

Original languageEnglish
Article number253302
JournalApplied Physics Letters
Volume98
Issue number25
DOIs
Publication statusPublished - 2011 Jun 20

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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