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Inkjet Printability Charact. of Polymeric and Glassy Small-Molecule OLED Hosts

Team Members

Londrea Garrett
Daniel Krajovic
Zachary Oliver
William Potter

Supervisors

Professors David Foster and Mark Juba, Chemical Engineering

Customers

Molecular Glasses, Inc.

Description

Inkjet printing of OLED host solutions for display manufacture has the attractive attribute of superior energetic and material efficiency, especially with highly concentrated solutions. Stable jetting requires an optimal balance of physicochemical and rheological solution properties. Conventionally, polymeric hosts are used, but these viscosify considerably upon concentration, which has shifted interest to glassy small-molecule hosts. We comparatively analyzed the printability of polymeric and small-molecule host solutions as a function of concentration.

Introducing Team Gryphon! Lonnie (top-left), Daniel (top-right), Zach (bottom-left), and Will (bottom-right).
Density, surface tension, and viscosity are deterministic of printability.
Density, surface tension, and viscosity are deterministic of printability.
Plot of printability v. concentration for polymeric and small-molecule host.
Plot of printability v. concentration for polymeric and small-molecule host.
Computational fluid dynamics (CFD) was attempted to create simulations of the inkjet printing process
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