Photo-current imaging of poly(p-phenylenevinylene) thin film light emitting devices with a laser scanning microscope
Journal
Proceedings of SPIE - The International Society for Optical Engineering
Journal Volume
3145
Pages
333-338
Date Issued
1997
Author(s)
Abstract
We have observed the poly(p-phenylene vinylene) (PPV) thin film based light emitting devices with a multifunction laser scanning microscope. The spatial distribution of PPV thin film's reflectivity, photoluminescence, and photocurrent are imaged. In addition, site dependent optical density and photocurrent spectra are also measured, which reveal the nature of optical excitations within PPV. The contrast between photoluminescence and photocurrent images is attributed to field induced luminescence quenching under exciton model.
Type
conference paper