Photoinduced Charge Separation in Q1D Heterojunction Materials: Evidence for Electron-Hole Pair Separation in Mixed-Halide MX Solids

Abstract

Resonance Raman experiments on doped and photoexcited single crystals of mixed-halide MX complexes (M = Pt; X = Cl, Br) clearly indicate charge separation; electron polarons preferentially locate on PtBr segments while hole polarons are trapped within PtCl segments. This polaron selectivity, potentially very useful for device applications, is demonstrated theoretically using a discrete, 3/4-filled, two-band, tight-binding, extended Peierls-Hubbard model. Strong hybridization of the PtCl and PtBr electronic bands is the driving force for separation.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1993
Accession Number
ADA264711

Entities

People

  • A. R. Bishop
  • Akrati Saxena
  • B. I. Swanson
  • L. A. Worl
  • S. C. Huckett

Organizations

  • Naval Command, Control and Ocean Surveillance Center

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Band Structures
  • Charge Transfer
  • Chemistry
  • Crystal Structure
  • Crystals
  • Electron Holes
  • Electrons
  • Energy Bands
  • Ground State
  • Heterojunctions
  • Materials
  • Materials Science
  • Ocean Surveillance
  • Raman Spectra
  • Single Crystals
  • Solid State Physics
  • Spectra

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene