Semiconductor nanocrystals photosensitize C60 crystals

Nano Lett. 2006 Jul;6(7):1559-63. doi: 10.1021/nl060136g.

Abstract

Semiconductor nanocrystals (SCNCs) made of CdSe, CdTe, and InP are used to photosensitize needlelike C(60) crystals. The photocurrent is increased by up to 3 orders of magnitude as compared with C(60) crystals without SCNCs. The photocurrent spectrum can be tuned precisely by the SCNC size and material, rendering the SCNC-functionalized C(60) crystals an excellent material for spectrally tuneable photodetectors. We explain the increased photocurrent as a result of photoexcited electrons transferring from the SCNCs to the C(60) crystals and causing photoconductivity, while the complementary holes remain trapped in the SCNCs.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Cadmium Compounds / chemistry
  • Fullerenes / chemistry*
  • Indium / chemistry
  • Nanostructures / chemistry*
  • Phosphines / chemistry
  • Photochemistry
  • Selenium Compounds / chemistry
  • Semiconductors
  • Tellurium / chemistry

Substances

  • Cadmium Compounds
  • Fullerenes
  • Phosphines
  • Selenium Compounds
  • Indium
  • cadmium selenide
  • fullerene C60
  • Tellurium
  • indium phosphide
  • cadmium telluride