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King Fahd University of Petroleum and Minerals

Chemistry Department          
      
Cordially Invites You to a
Seminar

Charge and Energy Transport Properties of Perovskites and Metal-Organic Frameworks for Solar Energy Applications

Speaker

Dr. Sameer Patwardhan
Argonne-Northwestern Solar Energy Research (ANSER) Center
Northwestern University, USA
 
Abstract

At the Argonne-Northwestern Solar Energy Research (ANSER) center, we study nanomaterials for solar energy applications, for instance, perovskites for electricity and metal-organic frameworks (MOFs) for fuel generation. It's a multidisciplinary and collaborative endeavor, where I provide my expertise in materials chemistry to study the fundamental processes of optical response, charge and energy transport, and surface chemistry. In recent years, organometal halide perovskites have emerged as promising materials for affordable solar energy, with certified power conversion efficiencies exceeding 20%. Yet, the fundamental photophysical processes that underlie high performance in solar cells are not clear. I will discuss recent experiment work on charge carrier dynamics in Perovskites that indicates the crucial role of sample preparation method on device efficiency. I will also share my experience in designing and implementing an undergraduate lab experiment in solar energy, which allows easy and cheap fabrication of perovskite solar panels. For solar fuels, a desired material should possess high surface area and catalytically active surface sites. MOFs are prospective materials possessing very high surface areas and identical surface sites. However, it must exhibit appropriate optical, catalytic, charge and energy transport properties. While limited literature is available, I will present one of the early computational studies of charge and energy transport in MOFs. Our 'structure-property relationship' study not only substantiates experimental findings in existing MOFs, but also predicts the properties of hypothetical MOFs and explores their potential use in devices. I will briefly mention work on optical properties5 and surface chemistry of materials, which is relevant to this topic.
 
Biography

Sameer Patwardhan is a postdoctoral scholar in the Argonne-Northwestern Solar Energy Research (ANSER) Center at Northwestern University under Prof. George C. Schatz. He is involved in computational and experimental studies of organo-metal halide perovskites and metal-organic frameworks for photovoltaic and electrochemical device applications. He completed his undergraduate studies in physical chemistry from the Indian Institute of Technology Bombay, India, and a Ph.D. in chemical engineering from the Delft University of Technology, the Netherlands.

  Date: Wednesday, September 2th, 2015
  Time: 11:00 a.m.
  Venue: B4 – Room 125
  There will be a get-together with refreshments at 10:45-11:00 a.m. in B4-125
  Courtesy: SAICSC-ACS                                                

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