In:
Advanced Materials, Wiley
Abstract:
Hybrid organic‐inorganic perovskites (PVKs) are among the most promising materials for optoelectronic applications thanks to their outstanding photophysical properties and easy synthesis. Herein, a new PVK‐based thermochromic composite is demonstrated. It can reversibly switch from a transparent state (transmittance 〉 80%) at room temperature to a coloured state (transmittance 〈 10%) at high temperature, with very fast kinetics, taking only a few seconds to go from the bleached to the colored state (and vice versa).X‐ray diffraction, Fourier‐transform infrared spectroscopy, Differential Scanning Calometry, rheological and optical measurements carried out during heating/cooling cycles reveal that thermochromism in our material is based on a reversible process of PVK disassembly/assembly mediated by intercalating polymeric chains, through the formation and breaking of hydrogen bonds between polymer and perovskite. Therefore, differently from other thermochromic perovskites, that generally work with the adsorption/desorption of volatile molecules, our system is able to perform several heating/cooling cycles regardless of environmental conditions.The color and transition temperature (from 70 to 120°C) can be tuned depending on the type of perovskite.Moreover, this thermochromic material is printable and can be deposited by cheap techniques, paving the way for a new class of smart coatings with an unprecedented range of colors. This article is protected by copyright. All rights reserved
Type of Medium:
Online Resource
ISSN:
0935-9648
,
1521-4095
DOI:
10.1002/adma.202307564
Language:
English
Publisher:
Wiley
Publication Date:
2023
detail.hit.zdb_id:
1474949-X