Colloquium: “Ink-Based Semiconductors: From In Situ Diagnostics to Autonomous Experimentation”
Dr. Aram Amassian
Materials Science and Engineering
NC State University
George P. Williams, Jr. Lecture Hall, (Olin 101)
Wednesday, February 19, 2020 at 3:00 PM
There will be a reception in the Olin Lounge at approximately 4 PM following the colloquium. All interested persons are cordially invited to attend.
Solution-processable semiconductors promise a new paradigm of low-cost fabrication of thin film electronic and optoelectronic materials and devices akin to additive manufacturing. Solution-processable semiconductors include conjugated organic molecules and hybrid inorganic-organic metal halide perovskites, both of which are making tremendous progress in advancing (opto) electronic and solar energy applications. However, the solidification of these complex materials is not well understood especially in application-relevant processing conditions, which tend to be far-removed from thermodynamic equilibrium. Moreover, the vast chemical and structural universe of these materials is overwhelming to traditional experimental approaches, preventing us from establishing processing-structure-property relationships. In light of these challenges we have developed multi-modal in situ
diagnostics techniques to help investigate and shed light on the mechanisms of ink-to-solid transformation of organic semiconductors and hybrid perovskite semiconductors and their impact on the operation and performance of semiconductor devices. Moreover, to address the vast chemical and processing universe of such materials, we have transitioned toward automated materials synthesis and processing strategies which, with the implementation of machine learning algorithms, will allow a full transition toward autonomous experimentation as a means of material discovery and optimization of functional properties. This presentation will introduce students to these emerging semiconductors, their solution deposition behavior through the perspective of in situ diagnostics approaches, and will present our most recent progress in autonomous experimentation for ink-based semiconductors.