Brown University School of Engineering

School of Engineering “Electronics and Photonics Seminar” Hybrid nanostructures for enhanced optoelectronics

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Friday, February 22, 2013 4:00pm - 5:00pm

Host: Prof. Domenico Pacifici, School of Engineering Sponsored by ADVANCE at Brown under NSF Grant No. 0548311. School of Engineering “Electronics and Photonics Seminar” Hybrid nanostructures for enhanced optoelectronics Prof. Shayla Sawyer Department of Electrical, Computer and System Engineering Rensselaer Polytechnic Institute, Troy, NY Abstract: Performance enhancement is enabled by the use of low cost, hybrid inorganic/organic nanostructured materials. For much of this research, the inorganic materials are nanostructured metal oxides. Advantages due to a high surface to volume ratio for better light absorption and an inherent large internal gain are typically hindered by surface defects and slow carrier transport mechanisms. Our research explores processes and the development of novel devices with strategic use of inorganic/organic core shell structures which provide surface passivation, better light absorption, and improved carrier transport. The combination provides markedly improved detector performance such as high responsivities on the order of 100s of A/W and improved transient responses by orders of magnitude. Furthermore, the nature of these materials leads to its deposition on various substrates, extending its potential sensing applications. Biosketch: Shayla Sawyer is an assistant professor in the Electrical, Computer, and Systems Engineering Department at the Rensselaer Polytechnic Institute. Her research includes the development of optoelectronic sensors and systems primarily in the blue/ultraviolet wavelength range. The optoelectronic devices are comprised of hybrid inorganic/organic materials what may include semiconductor metal oxide nanostructures, conductive polymers, conductive nanostructures, and bio-chemical solutions. Applications include sensitive ultraviolet detectors, environmental monitoring, radiation detection, and energy harvesting for various cross-disciplinary interests. Her overall research goal is aimed at effectively developing and characterizing novel sensors with consideration of systems that require sensitivity and/or selectivity to bring quantitative measurements in typically qualitative worlds. Her research contributes to collaborative centers including the NSF Smart Lighting Research Center, NSF Connection One Industry/University Cooperative Center, and the NSF GK-12 Community Situated Research Center. Dr. Sawyer obtained her PhD in electrical engineering from Rensselaer Polytechnic Institute as a Department of Homeland Security Fellow and received her undergraduate electrical engineering degree from Hampton University as a Merit Scholar, Honors College member, and basketball player. She has obtained industry experience throughout her education but most recently with GE Global Research and National Securities Technology Laboratory in Santa Barbara, California. Friday, February 22nd 4:00 pm in Barus & Holley 190