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Modelling of Joule heating based self-alignment method for metal grid line passivation

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Details

Original languageEnglish
Title of host publication2013 MRS Fall Meeting - Symposium M - Large-Area Processing and Patterning for Active Optical and Electronic Devices
PublisherMATERIALS RESEARCH SOCIETY
Number of pages6
DOIs
Publication statusPublished - 2014
Publication typeA4 Article in a conference publication
EventMaterials Research Society Symposium -
Duration: 1 Jan 1900 → …

Conference

ConferenceMaterials Research Society Symposium
Period1/01/00 → …

Abstract

A Joule heating based self-alignment method for solution-processable insulator structures has been modeled for the passivation of metal grid lines, for example for organic light emitting diodes or photovoltaic cells. To minimize overhang of the passivation layer from line edges, we have studied the Joule heating approach using solution-processable, cross-linkable polymer insulator films. Finite element simulations were performed to investigate the heating of the
sample using glass and poly(ethylene terephthalate) (PET) substrates. The sample was at room temperature and the current was selected to induce a temperature of 410 K at the conductor. It was found that the selection of substrate material is crucial for the localization of cross-linking. For a PET substrate, the temperature gradient at the edge of the conductor is approximately twice the gradient for glass. As a result, using a glass substrate demands high selectivity from the polymer cross-linking, thus making PET a more suitable substrate material for our application. A flexible PET substrate is, in addition, compatible with roll-to-roll mass-manufacturing processes.

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