Photovoltaic Windows and Chromogenic Perovskites
Jeffrey Christians a, Josephine Surel a, Elizabeth Cutlip a, James Mandeville a
a Department of Engineering, Hope College, Holland, MI, USA, United States
Oral, Jeffrey Christians, presentation 146
Publication date: 6th February 2024

A photovoltiac (PV) device that can change its color state has the potential to open up new opportunites and markets in building integrated PV. The development of smart PV windows can improve the energy performance of buildings with large glass facades and provide unique opportunites for occupant comfort. However, designing such multi-functional devices remains a significant challenge. This work will cover some of the different approaches that researchers have used to attack this problem, including chromogenic organic dyes and halide perovskite semiconducotrs. For halide perovskites, both the applicability of the perovskite to non-perovskite phase change and solvatochromism (color change in response to solvent intercalation-deintercalation) will be discussed, including demonstrations of initial work centered on both of these color change mechanisms and steps taken to address the key hurdles for each. Specifically, someinitial investigations on the rate of the perovskite to non-perovskite phase change will be presented in the context of developing this mechanism into a workable device. Secondly, work will present the prospects on designing 2D halide perovskites for more robust solvatochromic materials. This work will provide an improved understanding of the opportunities and challenges for different mechanisms for color-changing photovoltaic window operation and provide pathways forward to make windows into multifunctional components of future buildings.

The authors acknowledge support in part by the Hope College Dean of Natural and Applied Sciences and the Hope College Department of Engineering. JC acknowledges support by the Towsley Research Scholars Program grant from the Towsley Foundation of Midland, Michigan. JS acknowledges support by the Clare Boothe Luce Research Scholar program. This research was supported in part by funding provided by the National Aeronautics and Space Administration (NASA), under award number 80NSSC20M0124, Michigan Space Grant Consortium (MSGC), and from the National Science Foundation (DMR-2128632).

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