Li Xiuling, Zheng Wei, Zhang Yuhai
Institute for Advanced Interdisciplinary Research (iAIR), University of Jinan, Jinan 250022, Shandong, China.
Nanoscale. 2022 Sep 15;14(35):12574-12580. doi: 10.1039/d2nr03931a.
Photochromic single crystals of high transparency are considered as basic building blocks for many advanced applications, such as three-dimensional optical storage and volumetric displays. In this work, a transparent crystal of CsAgInCl perovskite was grown in a hydrothermal reactor. A high transmittance-contrast degree up to 30% was achieved by photochromism activation a Mn-doping strategy. Intriguingly, both coloration and decoloration could be triggered by light at appropriate wavelengths, 365 nm and 520 nm for example. Unlike heat-induced decoloration, the optical route represents a much faster tool to erase information. As a caveat from photochromism, the photoluminescence quantum yield (PL QY) was significantly decreased down to 1.7%. In an attempt to boost the quantum yield, sodium ions were introduced as a co-dopant. Surprisingly, the co-doping strategy not only boosted the PL QY to 33%, but also deactivated the photochromism. Our work expanded the library of photochromic materials by introducing a new perovskite single crystal, representing a paradigm for the making and breaking of photochromism.
高透明度的光致变色单晶被视为许多先进应用的基本构建块，如三维光存储和立体显示。在这项工作中，在水热反应器中生长出了CsAgInCl钙钛矿透明晶体。通过光致变色激活（一种锰掺杂策略）实现了高达30%的高透光率对比度。有趣的是，着色和褪色都可以由适当波长的光触发，例如365纳米和520纳米的光。与热致褪色不同，光致途径是一种更快的擦除信息的工具。作为光致变色的一个警告，光致发光量子产率（PL QY）显著降低至1.7%。为了提高量子产率，引入钠离子作为共掺杂剂。令人惊讶的是，共掺杂策略不仅将PL QY提高到33%，还使光致变色失活。我们的工作通过引入一种新的钙钛矿单晶扩展了光致变色材料库，代表了光致变色产生和破坏的范例。
