ICN2 Nanoseminar in Chemistry & Materials by: Prof. NamGyu Park, School of Chemical Engineering and Center for Antibonding Regulated Crystals Sungkyunkwan University, Suwon, Korea

The NanoSeminars are a new line of seminars established by the ICN2 to provide a platform for the exchange of knowledge and ideas, based around a lecture by a worldclass invited researcher. They bring to you three thematic series: Nano in Medicine & Health; Nano in Physics; and, Nano in Chemistry and Materials. The series about Medicine & Health is a joint initiative between the Nanomedicine Lab at the University of Manchester and the Catalan Institute of Nanoscience and Nanotechnology (ICN2).

More info at: https://icn2.cat/en/outreach/nanosemi...

Introductory talk: "Revealing the spiroOMeTAD photodoping process in a perovskite solar cell with insitu impedance spectroscopy and photoluminescence measurements" by Dr Sonia Ruiz Raga. Senior Researcher at Nanostructured Materials for Photovoltaic Energy Group at ICN2

Abstract of this NanoSeminar:

Since the groundbreaking report of the 9.7% efficient and 500 hstable solidstate perovskite solar cell (PSC) in 2012 based on methylammonium lead iodide, perovskite photovoltaics have been surged swiftly due to high power conversion efficiency (PCE) obtainable via facile fabrication procedure. As a result, a PCE of 25.7% was recorded in 2022. According to Web of Science, number of publications on PSCs increases exponentially since 2012, leading to the accumulated publications of more than 28,000 as of January, 2022. PSC is regarded as a game changer in photovoltaics because of lowcost and high efficiency surpassing the conventional high efficiency thin film technologies. High photovoltaic performance was realized by compositional engineering, device architecture and fabrication methodologies for the past 10 years. Toward theoretical efficiency over 30% and commercialization of PSCs, further studies on recombination and scalable technologies are required for next 10 years. In this talk, scientific and technological approaches for high efficiency and largearea coating are discussed. For high efficiency, not only perovskite materials and coatings but also interfacial engineering via additive and posttreatment is of importance. For upscaling PSCs, precursor formulation and coating methods are critical in determining photovoltaic performance. Stability issue will be also discussed and methodologies to improve stability are suggested.