Laser microstructured metal thin films as promising alternative for indium based transparent electrodes

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

Abstract

In the search for alternative materials to replace indium-tin-oxide in transparent electrodes we have structured copper and aluminum thin films (between 5 an 40 nm) for tailoring their optical properties. Micrometer scaled holes were produced using the direct laser interference patterning (DLIP) technique. We compared the optical and electrical parameters of nanosecond and picosecond processed thin films. It was found that the optical transmittance of the structured layers was relatively increased between 25 to 125% while the electrical resistance was marginally influenced. In addition, the laser treatment enhanced the diffuse to total transmission ratio (HAZE) by values ranging from 30 to 82% (relative) as a potential advantage of μm structuring. The results also show that both of the studied metals succeed to match the target which is set by typical applications of indium thin oxide (ITO) films. Furthermore, numerical simulations are performed in order to understand the ablation process of thin film material for ps and ns pulses.

Details

Original languageEnglish
Pages (from-to)A553-68
JournalOptics express
Volume24
Issue number6
Publication statusPublished - 21 Mar 2016
Peer-reviewedYes

External IDs

Scopus 84962650050

Keywords