Charge separation in type II tunneling multilayered structures of CdTe and CdSe nanocrystals directly proven by surface photovoltage spectroscopy

Dieter Gross, Iván Mora-Seró, Thomas Dittrich, Abdelhak Belaidi, Christian Mauser, Arjan J. Houtepen, Enrico Da Como, Andrey L. Rogach, Jochen Feldmann

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103 Citations (Scopus)

Abstract

Charge separation and diffusion in type II multilayered structures of CdTe and CdSe nanocrystals with a polymer spacer are unambiguously proven by surface photovoltage spectroscopy. Holes accumulate in CdTe nanocrystal layers, and the electrons in CdSe nanocrystal layers. An increase of thickness of the polymer spacer strongly decreases the charge separation efficiency. Surface photovoltage transients demonstrate diffusion of the separated charges over several layers of the same kind of nanocrystals.

Original languageEnglish
Pages (from-to)5981-5983
Number of pages3
JournalJournal of the American Chemical Society
Volume132
Issue number17
DOIs
Publication statusPublished - 5 May 2010

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ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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