Tutorial 3

Tutorial 3
Tandem solar cells: underlying physics and simulation

Tutorial Overview

Tandem solar cells have the allure of high radiative efficiency potentials; a two-junction device under AM1.5 spectrum is calculated to reach 47%. Practically, tandem solar cells have reached AM1.5 efficiencies just over 30% for established materials, and often in the teens for novel materials. In this tutorial, we will combine physics lessons with hands-on device-simulation tools to understand optical and electrical efficiency loss mechanisms. The goal will be to develop an intuition for tandem device performance, and a broad understanding of state-of-the-art research challenges in tandem device development.

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Overview of all the PVSEC-26 Tutorials


Tutorial conductors: Prof Tonio BUONASSISI, MIT & Dr Rolf STANGL, SERIS

Tonio Buonassisi is Associate Professor of Mechanical Engineering at MIT. He heads the MIT PVLab, a research laboratory with an interdisciplinary focus on photovoltaics and system design. His research interests include solar energy conversion, predictive process simulation, defects, multiscale characterization (synchrotron), photoelectrochemistry, system design and modeling, including technoeconomic analysis. Working in collaboration with over two dozen solar-energy companies, he contributed to the development of various solar-cell technologies in commercial production today, including the initial technology for Calisolar (now Silicor Materials). He co-founded the Fraunhofer Center for Sustainable Energy Systems in Boston. The PVLab has a strong focus on education and community-building, and is involved in international research collaborations in Singapore, Mexico, Spain, and Brazil, among others.

Dr Rolf Stangl is the Head of the Novel Cell Concepts & Simulation Group at the Solar Energy Research Institute of Singapore (SERIS). He is also project leader of three publicly funded projects from the Energy Innovation Programme Office (EIPO) of Singapore. He holds a PhD degree in physics for work conducted at the Fraunhofer Institute for Solar Energy Systems in Freiburg, Germany (organic solar cells). He then worked for several years as a research fellow at the “Helmholtz-Zentrum Berlin fϋr Materialien und Energie” (HZB) in Berlin, Germany (thin-film and wafer based heterojunction solar cells). After a sabbatical leave for Nanjing, China, he joined SERIS in April 2011. He has (co-)authored over 80 scientific papers and holds several patents in the area of silicon solar cells.