Journal
PHYSICAL REVIEW LETTERS
Volume 85, Issue 2, Pages 421-424Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.85.421
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We use electroabsorption spectroscopy and modeling studies to probe the electric field in light-emitting electrochemical cells. At room temperature and constant applied bias, the steady-state internal field is zero For a range of biases. However, when the ions are frozen in place by cooling under steady bias, and the bias is subsequently changed, the profile of the electric potential resembles a typical p-n junction.
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