멀티스케일 에너지 강좌 미래창조과학부 글로벌 프론티어 멀티스케일 에너지 시스템 연구단/서울대학교 미래창조과학부 글로벌프론티어 (재)멀티스케일 에너지 시스템 연구단은 나노기술과 에너지 기술의 융합을 통하여 혁신적 미래 광에너지와 분자에너지 원천기술 개발을 목표로 하는 멀티스케일 에너지 시스템 연구사업을 추진하고 있습니다. 연구단에서 국제 저명인사 초청 멀티스케일 에너지 강좌를 개최합니다. 관심 있는 분들의 많은 참석 바랍니다. 제 목 : Enhanced exciton harvesting in organic photovoltaic cells by directly engineering intermolecular energy transfer 연 사 : Prof. Russell J. Holmes (University of Minnesota) 일 시 : 2014년 11월 21일 (금) 오후 01:00 ~ 02:30 장 소 : 서울대학교 301동 117호 내 용 : In this talk, we will discuss an alternate strategy that instead focuses on novel device architectures aimed at directly addressing the deficiencies in excitonic energy transfer that limit the exciton diffusion length (LD). Specifically we present an approach to engineer LD by optimizing the intermolecular separation in thin film and consequently, the photophysical parameters responsible for energy transfer. By diluting the electron donor boron subphthalocyanine chloride into a wide-energy-gap host, we optimize the degree of interaction between donor molecules and observe a ~50% increase in LD. Interestingly, we find that dilution of the active material offers the ability to engineer energy transfer not only in the bulk, but also across interfaces. This is possible as dilution of one layer adjacent to a neat layer creates an imbalance of origin and destination sites for exciton hopping at the interface. Using a kinetic Monte Carlo formalism, we show that an imbalance of sites at interfaces can bias exciton motion toward the D-A interface, creating one-way gates for excitons. Thus, we demonstrate the ability to directly engineer exciton transport by tailoring intermolecular interactions in thin film, and also by designing exciton gating interfaces for enhanced exciton harvesting. 6. 약 력 : EDUCATION: 2006 Ph.D. - Electrical Engineering - Princeton University Advisor: Stephen R. Forrest (now at University of Michigan) 2002 M.A. - Electrical Engineering - Princeton University 2000 B.Sc.(Hons.) with First Class Honours - Physics - University of Manitoba (CANADA) ACADEMIC APPOINTMENTS: 2012-pres. Associate Professor Chemical Engineering and Materials Science, University of Minnesota 2008-pres. Member of Graduate Faculty Electrical and Computer Engineering, University of Minnesota HONORS AND AWARDS: 2012 ASM Bradley Stoughton Award for Young Teachers 2011 Outstanding Teacher Award, UMN College of Science and Engineering 2011 Young Faculty Award, UMN Initiative for Renewable Energy and Environment 2009-2012 Mayon Plastics Professor of Chemical Engineering and Materials Science 2009-2012 3M Nontenured Faculty Grant 2005 Newport Award for Research Excellence in Photonics 문 의 : 멀티스케일 에너지 시스템 연구단 연구지원본부 (☏ 889-6669,6670) 이창희 교수(전기 · 정보공학부), 최만수 교수 (기계항공공학부) 미래창조과학부 글로벌 프론티어 멀티스케일 에너지 시스템 연구단/서울대학교