Monitoring, Modeling, and Optimization of Lead Halide Perovskite Nanocrystal Growth within Porous Matrices,The Journal of Physical Chemistry C

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Monitoring, Modeling, and Optimization of Lead Halide Perovskite Nanocrystal Growth within Porous Matrices
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2020-03-30 , DOI: 10.1021/acs.jpcc.0c01750
David O. Tiede ₁ , Andrea Rubino ₁ , Mauricio E. Calvo ₁ , Juan F. Galisteo-López ₁ , Hernán Míguez ₁

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The growth of lead halide perovskites within metal-oxide nanoporous films has been recently considered as a means to obtain chemically and photostable ligand-free high-quality nanocrystals (NCs). The growth process, governed by the reactions taking place in nanoreactors dictated by the matrix pore size, has not been explored so far. In this work, we use photoluminescence as a tool to monitor the growth of perovskite NCs within the void network of an optically transparent matrix. We consider the effect of different external factors, such as temperature, light illumination, or precursor concentration, on the growth dynamics, and discuss a possible formation mechanism of the confined perovskite NCs. Based on this analysis, guidelines that could serve to improve the fabrication and optoelectronic quality of this type of NCs are also proposed.

中文翻译：

多孔基质中卤化钙钛矿型纳米晶生长的监测，建模和优化

近来，卤化钙钛矿在金属氧化物纳米多孔膜中的生长已被认为是获得化学和光稳定的无配体的高质量纳米晶体（NC）的一种手段。到目前为止，尚未探索由纳米反应器中发生的反应决定的生长过程，而纳米反应器是由基质孔径决定的。在这项工作中，我们使用光致发光作为一种工具来监测钙钛矿型NC在光学透明基质的空隙网络中的生长。我们考虑了温度，光照或前驱物浓度等不同外部因素对生长动力学的影响，并讨论了受限钙钛矿NCs的可能形成机理。基于此分析，还提出了可用于改善此类NC的制造和光电质量的指南。

更新日期：2020-03-30

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