MAAc封盖对无铅Cs2SnCl6双钙钛矿光物理和光致发光性能增强的影响

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence Pub Date : 2025-05-15 DOI:10.1016/j.jlumin.2025.121306

Usman Zahid, Muhammad Asad Riaz, Azhar Iqbal

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引用次数: 0

摘要

我们报道了巯基乙酸（MAAc）覆盖的Cs2SnCl6双钙钛矿纳米晶体（NCs）的PL和载流子寿命的增强。为了调节和介导Cs2SnCl6钙钛矿NCs的合成，MAAc被用作封盖剂。x射线衍射分析证实了Cs2SnCl6双钙钛矿在立方相中形成，具有优异的相稳定性。在ftir光谱中可以清楚地观察到具有MAAc s部分的Cs2SnCl6 NCs的封盖效应。x射线光电子能谱（XPS）分析证实了锡的+4氧化态。Sn较高的氧化态很可能是Cs2SnCl6在环境大气中空气稳定性提高的原因。利用稳态PL和时间分辨PL研究了Cs2SnCl6 NCs稳态PL的成因和PL衰减动力学。随着稳定剂MAAc浓度的增加，稳态PL光谱出现轻微的红移。MAAc的浓度对PL动力学和载流子寿命也有不可思议的影响，在所有合成的Cs2SnCl6 NCs中，最好的样品是具有0.5 mM封盖剂浓度的样品，其载流子寿命为11.17 ns。Cs2SnCl6 NCs的长PL寿命使其成为集成在发光二极管和x射线闪烁体中的可行选择。

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Effect of MAAc capping on the enhanced photophysical and photoluminescence properties of Pb-free Cs2SnCl6 double perovskites

We reported the enhanced PL and charge carrier lifetimes for Cs₂SnCl₆ double perovskite nanocrystals (NCs) capped with mercaptoacetic acid (MAAc) through various experimental investigations. To regulate and mediate the synthesis of Cs₂SnCl₆ perovskite NCs, MAAc was employed as a capping agent. The X-rays diffraction analysis confirms the formation of Cs₂SnCl₆ double perovskite with outstanding phase stability in cubic phase. The capping effect of Cs₂SnCl₆ NCs with S-moiety of MAAc was clearly observed in the FTIR-spectra. X-ray photoelectron spectroscopy (XPS) analyses confirming +4 oxidation state of Sn. Most probably the higher oxidation state of Sn is responsible for improved air stability of Cs₂SnCl₆ in ambient atmosphere. The genesis of steady-state PL and the PL decay kinetics of Cs₂SnCl₆ NCs are examined using steady-state PL and time-resolved PL. With an increase in the concentration of the MAAc as stabilizing agent, the steady-state PL spectra revealed a slight redshift. The concentration of MAAc also incredibly affects the PL kinetics, charge carrier lifetime and the best sample amongst all synthesized Cs₂SnCl₆ NCs is the one with the 0.5 mM capping agent concentration with charge carrier lifetime of 11.17 ns. The long PL lifetime of Cs₂SnCl₆ NCs enable them to be a viable option for integration in light-emitting diodes and x-ray scintillators.

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来源期刊

Journal of Luminescence 物理-光学

CiteScore

6.70

自引率

13.90%

发文量

850

审稿时长

3.8 months

期刊介绍： The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid. We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.