Effect of a local electric field on photogeneration efficiency in a photorefractive polymer

Liming Wang, Qing Wang, Luping Yu

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

The effect of a local electric field upon photogeneration efficiency was investigated through analyses of the dependence of photocurrent, photorefractive gain, diffraction efficiency, and birefringence on the applied field of a novel photorefractive polymer containing an ionic tri(bispyridyl) ruthenium complex. It was found that since this polymer system possesses a low glass transition temperature, the dipole moments formed between the counter ions are readily aligned and generate ionic dipole field which screen photogeneration sites from the applied field. This local field lowers the photogeneration efficiency and results in the saturation of photocurrent and photorefractive gain at high applied field. This local field's effect on an ionic polymer is further confirmed experimentally by comparing the photoconduction of a similar nonionic polymer.

Original languageEnglish (US)
Pages (from-to)2546-2548
Number of pages3
JournalApplied Physics Letters
Volume73
Issue number18
DOIs
StatePublished - Dec 1 1998

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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