Organic-inorganic junctions formed on porous silicon: Isolation of a surface configuration primary to the luminescence mechanism

T. R. Cottrell, Jay Burton Benziger, J. C. Yee, J. K.M. Chun, Andrew Bruce Bocarsly

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Scopus citations

Abstract

Organic-inorganic junctions were formed between porous silicon and various conjugated conducting polymers, poly(3-methylthiophene) and polypyrrole. Schottky type barriers were observed between the conducting polymers in their doped state and p and n-type porous silicon. In their undoped state the conducting polymers behave like p-type semiconductors. Consistent with this, ohmic contacts were observed between undoped conducting polymers and p-type porous silicon while rectifying behavior typical of a p-n junction was observed for conducting polymers deposited onto n-type porous silicon. During characterization of the porous silicon substrate, an investigation of the surface chemistry revealed a strong correspondence between solution pH and the luminescence intensity of porous silicon. Surface titration experiments were performed on p and n-type porous silicon and the results indicate that a monoprotic surface acid with a pKa between 3-4 is a primary component in the luminescence mechanism of porous silicon.

Original languageEnglish (US)
Title of host publicationMaterials Research Society Symposium Proceedings
PublisherPubl by Materials Research Society
Pages411-416
Number of pages6
ISBN (Print)1558991786
StatePublished - Jan 1 1993
EventProceedings of the Second Symposium on Dynamics in Small Confining Systems - Boston, MA, USA
Duration: Nov 30 1992Dec 4 1992

Publication series

NameMaterials Research Society Symposium Proceedings
Volume283
ISSN (Print)0272-9172

Other

OtherProceedings of the Second Symposium on Dynamics in Small Confining Systems
CityBoston, MA, USA
Period11/30/9212/4/92

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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    Cottrell, T. R., Benziger, J. B., Yee, J. C., Chun, J. K. M., & Bocarsly, A. B. (1993). Organic-inorganic junctions formed on porous silicon: Isolation of a surface configuration primary to the luminescence mechanism. In Materials Research Society Symposium Proceedings (pp. 411-416). (Materials Research Society Symposium Proceedings; Vol. 283). Publ by Materials Research Society.