Structural Evolution of Perovskite Nanoplatelets in Polar Solvents

IF 9.6 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Materials Letters Pub Date : 2024-11-28 DOI:10.1021/acsmaterialslett.4c0177910.1021/acsmaterialslett.4c01779

Akshaya Chemmangat, Jishnudas Chakkamalayath and Prashant V. Kamat*,

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引用次数: 0

Abstract

Tuning the absorption and emission properties of two-dimensional (2D) metal halide perovskites with layer numbers and halide composition offers a convenient way to utilize these materials in optoelectronic applications. When prepared as a colloidal suspension in toluene, these 2D nanoplatelets (NPLs) exhibit good stability. However, introduction of even a small amount of polar solvent (e.g., isopropanol) causes the NPLs to grow into a greater number of layered NPLs, eventually leading to bulk nanostructures. By controlling the addition of a polar solvent, we have now resolved the growth of NPLs from n = 2 to n = 3, 4, and >4 over an extended period of ripening. The energy transfer that occurs between higher bandgap NPLs (lower n) and lower bandgap NPLs (higher n) within the same suspension is analyzed using time-resolved transient absorption spectroscopy. The funneling of energy transfer between different layers outcompetes the excitonic recombination process, thus increasing the emission yield and lifetime.

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来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.