Fracture Behavior of Organic-Inorganic Halide Perovskite Thin Films for Solar Cells
Zhenghong Dai a, Nitin Padture a
a School of Engineering, Brown University, Providence, Rhode Island 02912, EE. UU., Providence, United States
Materials for Sustainable Development Conference (MATSUS)
Proceedings of nanoGe Fall Meeting 2021 (NFM21)
#PerEmer21. Perovskites III: Emerging Materials and Phenomena
Online, Spain, 2021 October 18th - 22nd
Organizers: Moritz Futscher, Jovana Milic and Aditya Mohite
Contributed talk, Zhenghong Dai, presentation 217
DOI: https://doi.org/10.29363/nanoge.nfm.2021.217
Publication date: 23rd September 2021

Organic-inorganic halide perovskites (OIHPs) has emerged as the most promising light-absorber materials in the photovoltaic community due to their near-ideal bandgaps. However, the low formation energies of OIHPs render them unstable. While significant progress has been made in improving the stability of OIHPs, perovskite solar cells (PSCs) will also need to be mechanically reliable if they are to service satisfactorily for decades. In this context, we study the fracture behavior of PSCs by measuring their cohesion energies (Gc) using double cantilever beam method and report a novel approach to strategically enhance the interfacial adhesion and performance of PSCs using self-assembled monolayers (SAMs), where we find that the perovskite solar cell stability is closely intertwined with its mechanical reliability. This work points to a new route for designing mechanically robust PSCs with long-term durability.

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