Photoconductivity Studies on an Organometallic Ladder Polymer, Bis (Catena-Poly(Methylarsenic)).

Abstract

Photoconductivity studies on single crystal samples of the organometallic ladder polymer bis (catena-poly(methylarsenic)), (BCPMA), have been made at room temperature in the spectral range 400 - 1700 nm (0.73 - 3.1 eV). All samples exhibited intrinsic photoconductivity behavior for photon energies greater than 1.55 eV. This value of the optical energy gap is in excellent agreement with the thermal energy gap found from electrical conduction studies on the same samples. Below the energy gap substantial impurity photoconduction is seen, probably due to iodine impurities. Explanations are suggested for the 'flash' photoresponse and the subsequent quenching (negative photoconduction) seen in the impurity region, including deep traps and interimpurity hopping recombination. The photoresponse is found to be field dependent and in the extrinsic region is governed by the bulk-limited Poole-Frenkel effect. (Modified author abstract)

Document Details

Document Type
Technical Report
Publication Date
Sep 19, 1974
Accession Number
ADA000282

Entities

People

  • J. E. Lewis
  • M. Edris

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Agreements
  • Crystals
  • Energy Gaps
  • Impurities
  • Photoconductivity
  • Single Crystals

Fields of Study

  • Materials science

Readers

  • Molecular Photonics/Laser Physics
  • Polymer Science and Technology
  • Semiconductor Device Technology