Dr. Brian Wieliczka: Publications

GdWN3 is a nitride perovskite

Applied Physics Letters AIP Publishing 125:11 (2024) 112902

Authors:

Rebecca W Smaha, John S Mangum, Neha Yadav, Christopher L Rom, Brian M Wieliczka, Baptiste Julien, Andrew Treglia, Craig L Perkins, Prashun Gorai, Sage R Bauers, Andriy Zakutayev

Abstract:

Nitride perovskites ABN3 are an emerging and highly underexplored class of materials that are of interest due to their intriguing calculated ferroelectric, optoelectronic, and other functional properties. Incorporating novel A-site cations is one strategy to tune and expand such properties; for example, Gd3+ is compelling due to its large magnetic moment, potentially leading to multiferroic behavior. However, the theoretically predicted ground state of GdWN3 was a non-perovskite monoclinic structure. Here, we experimentally show that GdWN3−y crystallizes in a perovskite structure. High-throughput combinatorial sputtering with activated nitrogen is employed to synthesize thin films of Gd2−xWxN3−yOy with oxygen content y < 0.05. Ex situ annealing crystallizes a polycrystalline perovskite phase in a narrow composition window near x = 1. LeBail fits of synchrotron grazing incidence wide angle x-ray scattering data are consistent with a perovskite ground-state structure. Refined density functional theory calculations that included antiferromagnetic configurations confirm that the ground-state structure of GdWN3 is a distorted Pnma perovskite with antiferromagnetic ordering, in contrast to prior predictions. Initial property measurements find that GdWN3−y is paramagnetic down to T = 2 K with antiferromagnetic correlations and that the absorption onset depends on cation stoichiometry. This work provides an important path toward both the rapid expansion of the emerging family of nitride perovskites and understanding their potential multiferroic properties.

Orientational Order in Spin-Cast Lead-Iodide Perovskite Nanocrystal Solids

Chemistry of Materials American Chemical Society (ACS) 35:23 (2023) 9924-9934

Authors:

Julian A Vigil, Brian M Wieliczka, Bryon W Larson, Maged Abdelsamie, Nikita S Dutta, Md Azimul Haque, Abhijit Hazarika, Joseph M Luther, Michael F Toney

Combined Stress Testing of Perovskite Solar Cells for Stable Operation in Space

ACS Applied Energy Materials American Chemical Society (ACS) 6:20 (2023) 10319-10326

Authors:

Kaitlyn T VanSant, Ahmad R Kirmani, Jay B Patel, Laura E Crowe, David P Ostrowski, Brian M Wieliczka, Michael D McGehee, Laura T Schelhas, Joseph M Luther, Timothy J Peshek, Lyndsey McMillon-Brown

Nanocrystal‐Enabled Perovskite Heterojunctions in Photovoltaic Applications and Beyond

Advanced Energy Materials Wiley 13:22 (2023)

Authors:

Brian M Wieliczka, Severin N Habisreutinger, Kelly Schutt, Jeffrey L Blackburn, Joseph M Luther

Co-deposition of hole-selective contact and absorber for improving the processability of perovskite solar cells

Nature Energy Springer Nature 8:5 (2023) 462-472

Authors:

Xiaopeng Zheng, Zhen Li, Yi Zhang, Min Chen, Tuo Liu, Chuanxiao Xiao, Danpeng Gao, Jay B Patel, Darius Kuciauskas, Artiom Magomedov, Rebecca A Scheidt, Xiaoming Wang, Steven P Harvey, Zhenghong Dai, Chunlei Zhang, Daniel Morales, Henry Pruett, Brian M Wieliczka, Ahmad R Kirmani, Nitin P Padture, Kenneth R Graham, Yanfa Yan, Mohammad Khaja Nazeeruddin, Michael D McGehee, Zonglong Zhu, Joseph M Luther

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