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Article July 1st, 2013 (Glass Performance Days 2013) 0
Guowen Ding, Daniel Schweigert, Yong Li, Yiwei Lu, Philip Lingle & Muhammad Imran
Silver (Ag) nanoscale films are widely used as Low Emissivity (Low-E) coatings on glass due to their high transmittance of the visible spectrum along with high reflection of the near IR. Ag needs protection during thermal treatment or exposure to environmental chemicals by a barrier layer such as TiOx or NiCrOx. However, current barriers have relatively high optical absorption or poor mechanical durability, so an improved barrier is desired for low-E glass. Theory provides only limited direction, so we must rely upon experiment to test the thousands of possible combinations of nanoscale layers within a target stack to find an optimal solution. Intermolecular provides High Productivity Combinatorial (HPC™) workflows that dramatically accelerate the ability to explore nanoscale stacks of thin films. HPC workflows include custom hardware to allow for parallel and rapid-serial screening of dozens of material combinations on relatively small substrates. By using HPC workflow, two binary and one ternary metal alloys were identified which all show much better performance than baseline TiOx or NiCrOx barriers layer. All three alloys demonstrated tunable reductions in optical absorption, Ag-index-of-refraction change, emissivity, sheet resistance, and improved mechanical durability. Working in this manner dramatically accelerates the pace of R&D, while