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Energy Seminar: Paul McIntyre: Materials for Solar Fuels: Coupling Efficient Catalysts and High-Performance Photovoltaics by Atomic Layer Deposition
Atomic layer deposition (ALD), a cyclic form of chemical vapor deposition which occurs via a series of self-limiting chemisorption reactions, is increasingly used in fabricating microelectronic devices because of its remarkable potential for depositing a very wide range of thin films of well-controlled thickness and uniformity over a large variety of substrates. Exciting applications of ALD in energy technologies have also emerged in recent years, particularly in photovoltaics and micro-fabricated solid oxide fuel cells. In this presentation, I will summarize recent research in which ALD has been used to prepare stable photoelectrodes for efficient solar-driven water splitting to create hydrogen fuel. ALD-grown TiO2 layers are found to be particularly effective in inhibiting oxidative corrosion of high-quality semiconductor absorbers and in electronically coupling these semiconductors to efficient catalysts for oxygen evolution, the kinetically-limiting step in water splitting. This talk will describe factors influencing the electronic conductivity of ALD-TiO2, and design principles for optimizing the photovoltage of these protected semiconductor junctions. Atomic layer deposition of TiO2-transition metal oxide alloy layers that can function as efficient oxygen evolution catalyst layers and high work function Schottky contacts for water splitting photoanodes will also be reported. Finally, results obtained from a novel multijunction silicon photoelectrochemical cell incorporating ALD-TiO2 protection and exhibiting > 10% solar-to-hydrogen efficiency will be described.
Paul McIntyre is Rick and Melinda Reed Professor in the School of Engineering, Chair of the Department of Materials Science and Engineering and Senior Fellow of the Precourt Institute for Energy at Stanford University. He was previously Member of the Technical Staff of the central research laboratories of Texas Instruments, and was a Director’s-Funded Postdoctoral Fellow at Los Alamos National Laboratory. At Stanford, McIntyre leads a research team of graduate students, postdoctoral researchers and adjunct professors who perform basic studies of nanostructured inorganic materials for applications in electronics and energy technologies. He is best known for his work on metal oxide/semiconductor interfaces, functional metal oxide thin films, atomic layer deposition, and semiconductor nanowires. McIntyre is an author of approximately 220 archival journal papers and an inventor of 8 US patents. He has given over 120 invited presentations, plenary talks and tutorial lectures on these topics. He has received two IBM Faculty Awards, a Charles Lee Powell Foundation Faculty Scholarship and an SRC Inventor Recognition Award. McIntyre was a GCEP Distinguished Lecturer in 2010 and received the Woody White Award of the Materials Research Society in 2011. In 2016, he was the inaugural Colorado School of Mines/NREL Materials Science Distinguished Lecturer.
- Monday, February 5, 2018
4:30 pm – 5:20 pm
- NVIDIA Auditorium, Jen-Hsun Huang Engineering Center Map
Free and open to all.
- General Public, Faculty/Staff, Students, Alumni/Friends
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