A fun and educational tradition of the IEEE-PVSC, is the extended 3 hour tutorials given on the Sunday before the conference. These tutorials give a deep insight into selected research and development topics and serve both as an expert review of the field for all, as well as an introduction for newcomers. We have selected 11 current topics in PV such as popular classics Si PV, thin film, modeling, testing and characterization. Also I want to highlight some new exciting topics for this year: Next generation PV and emerging concepts, 100% renewable future, and hybrid tandem solar cells. The tutorials are given by some of the most recognized and experienced scientists in the field. All tutorials come with a set of slides which are an indispensable source of information that you will not find anywhere else! Students get one free ticket but nobody should miss this opportunity. Confirm your participation early in advance as tickets will be limited.
We are looking forward to welcoming you on Sunday June, 14 at 8:30 AM.
2020 IEEE PVSC-47
The IEEE PVSC will be offering half day tutorials on Sunday June 14th, 2020 The tutorials cover a wide range of photovoltaic related topics, presented by the leading experts in the field.
Please note the following times for the Tutorials:
Sunday AM Tutorials: 8:30 AM - 12:00 PM
Sunday PM Tutorials: 1:30 PM - 5:00 PM
Instructor: Silvana Ayala Pelaez, National Renewable Energy Laboratory, Golden CO, USA
Silicon PV is the prevalent photovoltaic technology, and it is also an area that continues to provide surprising results even with the impressive work done through the years. In this tutorial, we will begin by setting a framework to understand Si PV devices. Several silicon solar cell technologies will be surveyed (including amorphous, crystalline silicon, and bifacial), considering both their present laboratory status and manufacturing processes. We will survey simulation and experimentation to predict silicon module behavior in the field.
In particular, the tutorial will give a detailed overview covering, but not limited to, the performance and cost development of bifacial technology, half-cut cells, and other new silicon technologies, and analyze their market potential. The tutorial will conclude with a brief perspective on possible future scenarios for technological evolution and solving current challenges.
Silvana Ayala Pelaez is a Post-doc at the National Renewable Energy Laboratory, working with the Performance & Reliability group on bifacial silicon technology. She has a PhD in Electrical and Computer Engineering from the University of Arizona. She also has a M.S. in Optical Sciences at the same University. She received a B.S. in Mechatronics Engineering from Monterrey Tec (ITESM 2007). Current projects are focused on bifacial photovoltaic performance and modeling. Her research includes characterization and energy simulation for bifacial and bifacial/holographic system energy productions. She edited and published the book “Solar Outreach Handbook” in 2018.
III-V photovoltaics has often been the testing ground for pushing the limits of what is possible in light-to-electricity conversion efficiency. The ability to grow low-defect III-V semiconductor material, highly effective interface passivation, and wide bandgap tunability have enabled the development of highly efficient multijunction cell technology in the III-V material system. III-V multijunction solar cells have historically been the highest efficiency PV technology since the early 1990s, with efficiencies now up to 46%. III-V multijunction cells represent the only 3rd generation solar cell technology so far to exceed the efficiency of widely deployed 1st and 2nd generation photovoltaics.
With increasing interest in low-cost, flat-plate tandem (2-junction) or multijunction (2 or more junction) solar cells as a way to break through the efficiency ceiling of widely deployed single-junction PV, there is much to be learned from III-V multijunction technology. Analogs to the structures in demonstrated III-V multijunction cells may be found in new low-cost materials, and the III-V materials themselves may be deposited much more cheaply with new growth methods. Interestingly, III-V multijunction PV has often included group-IV cells in the multijunction stack, as in lattice-matched and metamorphic GaInP/GaInAs/Ge 3-junction cells, and GaPAs/Si tandem cells. In single-junction photovoltaics, photon recycling enhancement in direct bandgap III-V solar cells has pushed their efficiency closer to the detailed balance limit than in any other material system, increasing our understanding of the fundamental physics of energy conversion.
This tutorial is an introduction to the basic semiconductor physics of III-V solar cells, III-V materials growth, processing and characterization, multijunction (MJ) solar cell structure, measurement and applications, and new concepts in III-V cells, III-V/Si, and other types of multijunction cells. We start with a comparison of detailed balance thermodynamic efficiency limits with semi-empirical efficiency models, and examine PV passivation, device structure and growth considerations to minimize the difference between theory and practice. We look at the main III-V growth methods as well as new higher-throughput deposition methods, and at key characterization methods for crystal structure, doping, and recombination rate measurement. The structures of important families of III-V multijunction cells are reviewed, such as lattice-matched, metamorphic, inverted metamorphic, wafer bonded, and III-V on silicon cells. Low-cost, flat-plate multijunction cells in other materials systems such as II-VI/Si and perovskite/Si tandem cells are also studied for comparison. The past, present, and future of III-V photovoltaic cell applications are reviewed. Finally, the physics of photon recycling and luminescent coupling in single and multijunction cells, nanostructured PV, and other advanced concepts in III-V solar cells are studied.
Modeling of photovoltaic devices is an increasingly necessary tool for understanding and improving the performance of PV cells and modules. In this tutorial we will review capabilities of several simulation tools that are available for the engineer and scientist—tools that vary in complexity and scope of the underlying physics, dimensionality, applicability to complex geometrical structures, and cost. We will review some methods and measurements for generation of device modeling input data beyond simple I-V characterization: materials- and device-level electrical characterization, optical data, and physical/compositional data. And we will spend a large fraction of our time in a hands-on demonstration of the utility of a very useful simulation package for thin-film solar cells: SCAPS. We will examine several prototype device models and demonstrate model definition from scratch, predict the changes in device responses (e.g. QE, admittance spectroscopy) as a function of fundamental defect parameters, derive material characteristics and properties through automated fitting to experimental data, explore scripts to modify the operation of SCAPS, and examine a particular class of metastable defects and their interaction with device operational states. Attendees are encouraged to bring laptops and will be given instructions for pre-installing SCAPS in advance of the session.Jeff Bailey joined MiaSole in May 2014 as Senior Member of the Technical Staff in the Advanced Films Development group. His work focuses on advanced device characterization techniques to understand defect and impurity properties in CIGS solar cells. In previous roles Jeff was Senior Development Engineer at two solar startups (SoloPower and NanoGram), both CIGS- and silicon-based, where he developed processes and hardware for innovative front-end manufacturing. Jeff also managed an advanced technology group at Aviza Technology where he established the use of computational fluid dynamics (CFD) and simulations as the foundation of new product and sustaining engineering efforts. His work in PV extends for more than 20 years from his groundbreaking work as a graduate student in defect-impurity interactions in multicrystalline silicon solar cell material at the University of California, Berkeley, in the Department of Materials Science and Engineering.