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Fast Transient "Photoconductivity" in Semiconducting Polymers: Free Carrier Photocurrent or Displacement Current Generated by Electric-Field-Induced Polarization of Bound Excitons?
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Moses, D. | - |
dc.contributor.author | Cormoretto, D. | - |
dc.contributor.author | Lee, Changhee | - |
dc.contributor.author | Heeger, A. J. | - |
dc.date.accessioned | 2009-11-23T04:24:04Z | - |
dc.date.available | 2009-11-23T04:24:04Z | - |
dc.date.issued | 1997 | - |
dc.identifier.citation | Synth. Met.84 (1997) 559 | en |
dc.identifier.issn | 0379-6779 | - |
dc.identifier.uri | https://hdl.handle.net/10371/13724 | - |
dc.description.abstract | We have re-examined the displacement current interpretation of the fast transient photocurrent in semiconducting polymers. We find that our earlier calculation was in error by a factor of 4π (arising from incorrectly converting from MKS units). We re-evaluate the displacement current contribution using the earlier data obtained from spin-cast PPV and data from tensile drawn samples of PPV. The drawn and oriented PPV yields a fast transient photocurrent that is three orders of magnitude larger than that obtained from spin-cast films (when normalized to the same incident photon flux and to the same applied electric field). For the best samples, analysis of the data in terms of a displacement current from bound excitons would require an exciton polarizability, (αexc > 107 Å3, far too large to arise from bound excitons. For comparison, we summarize the data available from other conjugated polymers as well | en |
dc.language.iso | en | - |
dc.publisher | Elsevier | en |
dc.subject | photoconductivity | en |
dc.subject | polarizability | en |
dc.title | Fast Transient "Photoconductivity" in Semiconducting Polymers: Free Carrier Photocurrent or Displacement Current Generated by Electric-Field-Induced Polarization of Bound Excitons? | en |
dc.type | Article | en |
dc.contributor.AlternativeAuthor | 이창희 | - |
dc.identifier.doi | 10.1016/S0379-6779(97)80859-4 | - |
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