Degradation of Mesoporous Carbon Perovskite Solar Cells
David Tanenbaum a, Kylie Thompson a, Adam Dvorak a, Dan Tan a, Bry Hyunjin Hong a
a Department of Physics and Astronomy, Pomona College,, Claremont, CA, 91711,
International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV23)
London, United Kingdom, 2023 June 12th - 14th
Organizers: Tracey Clarke, James Durrant and Trystan Watson
Poster, David Tanenbaum, 238
Publication date: 30th March 2023

We fabricate and characterize carbon-based  lead halide perovskite solar cells composed of a mesoscopic scaffold of metal oxides that is screen printed and infiltrated with a lead halide perovskite precursor solution with a methylammonium cation.(MAPbI3)  We characterize the cells over time to investigate degradation pathways and improve fabrication methods. We study electrical properties and extract key photovoltaic parameters from IV curves, spectral response from External Quanutm Effiicency (EQE) measurements and spatial mapping of both the structure from microscopy, and the photovoltaic performance from Laser Induced Beam Currents (LBIC) of our cells.  We track and classify defects over time under various ISOS standardized conditions (ISOS D1, L1, O2) and show that the degradation mechanisms are different in each case.  Our fabrication and characterization is entirely in ambient atmosphere without a clean room by undergraduate students.  Devices are aged as manufactured without encapsulation.  We look at effects of active area and compare our devices with those made using mesoscopic scaffolds printed by a commercial vendor.

Thank you to the Watson group at SPECIFIC, the Lira-Cantu group at ICN2, Hardy Richardson, Hal Van Ryswyk, and Janice Hudgings for their help and support. This work was funded by the Sontag Endowment for Physics, a Hirsch Research Initiation Grant, Pomona College, and the NSF MRI Program under Award Number 1919282.

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