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Meeting ID: 940 2919 7136
Passcode: 979703

Bottom‐up approaches to synthesizing functional materials from solution-phase precursors to form thin-films can enable devices with tailorable, on-demand properties to be built in flexible forms and ubiquitously deployed onto arbitrary host objects. Such flexible devices present a sizeable market projected to be on the order of 100’s of billions in 2030 (IDTechEx). Despite the tremendous strides made over the last two decades, thin-film devices grown from solutions are still much inferior to the vacuum-processed counterparts. The reason is primarily due to a large number of defects existing in solution-grown films that adversely induce various types of energy losses during charge transport. The latter directly results in inefficient charge carrier percolation pathways that hinder solution-processable devices from achieving optimal performance and desirable functionality.

In this talk, I will show how to utilize device and material engineering to build robust solution-grown devices. I will first introduce a hybrid lamellar transistor channel architecture fabricated using oxide and organic materials from precursor solutions at plastic-compatible processing temperature [1]. The pioneered interfacial engineering can effectively passivate defects and prevent their mobilizations, enabling oxide thin-film transistors with record-high operational stability. Following this, I will describe a unique geometric engineering strategy using solid-state hetero-oxide transistors for real-time detection of biomolecules [2]. Selective detection is enabled by suitable analyte receptors tethered on the oxide surface. Purposing this sensor to detect SARS-CoV-2 spike S1 protein demonstrates real-time attomolar sensitivity with an ultrahigh dynamic detection range. In the last part of my talk, I will discuss the potential of using metal-halide perovskite photovoltaics as indoor power sources for future self-sustainable electronics in the era of the Internet of Things. Here, my focus will be on addressing the biggest concern in the perovskite community—long-term stability. I will present an ionic additive that can effectively retard critical cell degradation parameters and help achieve unprecedentedly high operational stability, unlocking future commercial opportunities.

Looking forward, perfecting our engineering approaches can largely mitigate disadvantageous material properties and render the practicality of low-cost solution-grown functional materials for a wide range of electronic and energy applications with economically viable manufacturing solutions.

References

1. Y-H Lin et al., Nature Electronics 2, 587-595 (2019)
2. “Arab institutions ramp up COVID-19 research”, Nature Middle East
3. Y-H Lin et al., Science 369, 96-102 (2020)

About the Speaker(s)

Yen-Hung Lin
Research Associate, Dept of Physics, U Oxford

Dr. Yen-Hung Lin is currently a research associate in the Photovoltaic and Optoelectronic Device Group led by Prof. Henry Snaith in the Department of Physics at the University of Oxford. After obtaining his BSc and MSc from National Taiwan University, he worked for AU Optronics Corp. (Taiwan) as a senior mobile display R&D engineer. In 2010, he moved to the UK and completed his MSc in Optics and Photonics (2011) followed by a PhD in Experimental Solid State Physics (2015) with Prof. Thomas Anthopoulos at Imperial College London. In 2015, he received the Graduate Student Gold Award from the Materials Research Society (MRS), in recognition of his academic achievements and current materials research that display a high level of excellence and distinction. In 2016, he was awarded the Solid State Physics Prize from Imperial College, in recognition of his academic contribution as measured by peer-reviewed journal publications. Dr Lin specialises in device engineering by utilising bottom-up approaches at the molecular level to explore interactions that govern the structural formation and molecular ordering with an aim to formulating strategies for facilitating low-loss charge transport. He has contributed to more than 50 peer-reviewed articles published in highly regarded international journals.

Contact

For more information, contact Ashley Parker at ashley.l.parker@dartmouth.edu.