Year: 2019
Type: conference-paper
Abstract: In this talk we describe the role of interfaces, surface defects, and strain on non-radiative recombination losses in hybrid perovskite semiconductors. Using combinations of scanning-probe, electron backscatter diffraction (EBSD), and time-resolved photoluminescence microscopy and spectroscopy, we explore the microscopic origins of non-radiative recombination in both archetypal methylammonium lead tri-iodide (MAPI), and more advanced mixed-cation perovskites. Using EBSD, we image local grain orientation and strain, and correlate surface strain with increased non-radiative recombination in MAPI. We explore the interface between the perovskite and various common charge extraction layers, combining experiment and simulation to show that surface recombination at the charge extraction layers is a limitation in current perovskite solar cell architectures. Finally, we explore alternative passivation and extraction layers to propose ways to more routinely approach the theoretical voltage limits in perovskite photovoltaic using scalable process chemistry.
DOI: 10.2172/1771116
Author: David Ginger
Institution: University of Washington
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Funders: National Science Foundation, U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Office of Naval Research, Division of Chemical, Bioengineering, Environmental, and Transport Systems, Solar Energy Technologies Office, Office of Energy Efficiency, Air Force Office of Scientific Research
Awards: G3802608038, G6099312293
OpenAlex ID: W3152964215