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Thermochromic Halide Perovskite Windows with Ideal Transition Temperatures

Journal Article · · Advanced Energy Materials
 [1];  [1];  [2];  [3];  [4];  [1];  [1];  [1];  [4];  [1];  [1]
  1. National Renewable Energy Laboratory 15013 Denver West Parkway Golden CO 80401 USA
  2. 2qV Technology Company University of Wisconsin—Stout 712 Broadway Street South Menomonie Wisconsin 54751 USA
  3. Swift Solar 981 Bing St San Carlos CA 94070 USA
  4. National Renewable Energy Laboratory 15013 Denver West Parkway Golden CO 80401 USA, Department Chemical and Biological Engineering Colorado School of Mines Golden CO 80401 USA
Abstract

Urban centers across the globe are responsible for a significant fraction of energy consumption and CO 2 emission. As urban centers continue to grow, the popularity of glass as cladding material in urban buildings is an alarming trend. Dynamic windows reduce heating and cooling loads in buildings by passive heating in cold seasons and mitigating solar heat gain in hot seasons. Here, reduced energy consumption in highly glazed buildings in a mesoscopic building energy model is demonstrated when thermochromic windows are employed. Savings are realized across eight disparate climate zones of the United States. The model is used to determine ideal critical transition temperatures of 20–27.5 °C for thermochromic windows based on metal halide perovskite materials. Ideal transition temperatures are realized experimentally in composite metal halide perovskite films composed of perovskite crystals and an adjacent reservoir phase. The transition temperature is controlled by cointercalating methanol, instead of water, with methylammonium iodide and tailoring the hydrogen‐bonding chemistry of the reservoir phase. Thermochromic windows based on metal halide perovskites represent a clear opportunity to mitigate the effects of energy‐hungry buildings.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Building Technologies Office; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-76SF00515; AC36-08GO28308
OSTI ID:
1923720
Alternate ID(s):
OSTI ID: 1923722
OSTI ID: 1958150
Report Number(s):
NREL/JA-5900-85376; 2203331
Journal Information:
Advanced Energy Materials, Journal Name: Advanced Energy Materials Journal Issue: 12 Vol. 13; ISSN 1614-6832
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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