This lecture focuses on the challenging understanding-based design, creation and realization of new materials families for creating unconventional, flexible electronic circuitry and third-generation solar cells. Fabrication methodologies to achieve these goals include high-throughput, large-area, high-resolution printing techniques. Materials design issues for electronics include: 1. Rationally designing high-mobility p- and n-type organic semiconductors for printed organic CMOS, 2. Self-assembling and printing high-k nanodielectrics enabling ultra-large capacitance, low leakage, high breakdown fields, minimal trapped interfacial charge, and device radiation hardness, 3. Implementing polycrystalline and amorphous oxide semiconductors for printable transparent and mechanically flexible electronics, 4. Combining these materials sets to fabricate a variety of high-performance thin-film transistor-based circuitries. Materials design topics for photovoltaics include: 1) Tailoring nanoscale layers for modulating charge transport across hard matter (electrode)-soft matter interfaces in polymer and perovskite solar cells, 2) Controlling charge transport by specific active layer atomistic/microstructural organization in active layers and on electrodes, 3) Controlling exciton dynamics and carrier generation at active layer donor-acceptor interfaces, 4) Designing transparent electrodes and interfacial layers with enhanced properties. It will be seen that rational interface engineering along with improved donor and acceptor structures, guided by theoretical/computational analysis, significantly enhances solar cell performance and durability. The symbiosis of green materials synthesis, computational modeling and simulation, materials characterization, and device fabrication and evaluation, are central.

Hybrid soft matter/hard matter materials design for flexible electronics and solar cells

256th National Meeting (2018)

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