Optimization of Si NC/P3HT hybrid solar cells

Chin Yi Liu, Zachary C. Holman, Uwe R. Kortshagen

Research output: Contribution to journalArticle

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Abstract

Silicon nanocrystals (Si NCs) are shown to be an electron acceptor in hybrid solar cells combining Si NCs with poly(3-hexylthiophene) (P3HT). The effects of annealing and different metal electrodes on Si NC/P3HT hybrid solar cells are studied in this paper. After annealing at 150°C, Si NC/P3HT solar cells exhibit power conversion efficiencies as high as 1.47%. The hole mobility in the P3HT phase extracted from space-charge-limited current measurements of hole-only devices increases from 2.48 X 10 -1 to 1.11 X 10 -9 m 2 V -1 s -1 after annealing, resulting in better transport in the solar cells. A quenching of the open-circuit voltage and short-circuit current is observed when high work function metals are deposited as the cathode on Si NC/P3HT hybrid devices.

Original languageEnglish (US)
Pages (from-to)2157-2164
Number of pages8
JournalAdvanced Functional Materials
Volume20
Issue number13
DOIs
StatePublished - Jul 9 2010

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ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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