Enhancement of hybrid solar cell performance by polythieno [3,4-b]thiophenebenzodithiophene and microplasma-induced surface engineering of silicon nanocrystals

V. Švrček*, T. Yamanari, D. Mariotti, K. Matsubara, M. Kondo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

We have developed a room temperature fabrication technique for hybrid bulk heterojunction solar cells based on silicon nanocrystals (Si-ncs) embedded in polythieno[3,4-b]thiophenebenzodithiophene (PTB7) and that exhibit a high open-circuit voltage exceeding 1 V. This type of device outperforms the open-circuit voltage of analogous devices based on Si-ncs within poly(hexylthiophene) (P3HT). We also demonstrate that three dimensional surface engineering of Si-ncs by microplasma processing in ethanol can be used to enhance the electronic interactions with PTB7, without using any surfactant, and increasing the power conversion efficiency.

Original languageEnglish
Article number223904
JournalApplied Physics Letters
Volume100
Issue number22
DOIs
Publication statusPublished - 28 May 2012

Funding

This work was partially supported by a NEDO Project (Japan). D.M. gratefully acknowledges the support of the JSPS Invitation Fellowship (Japan).

Keywords

  • conversion efficiency
  • heterojunctions
  • metamaterials

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