In situ and real-time ultrafast spectroscopy of photoinduced reactions in perovskite nanomaterials

IF 15.7 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Nature Communications Pub Date : 2025-05-28 DOI:10.1038/s41467-025-60313-3

Gi Rim Han, Mai Ngoc An, Hyunmin Jang, Noh Soo Han, JunWoo Kim, Kwang Seob Jeong, Tai Hyun Yoon, Minhaeng Cho

{"title":"In situ and real-time ultrafast spectroscopy of photoinduced reactions in perovskite nanomaterials","authors":"Gi Rim Han, Mai Ngoc An, Hyunmin Jang, Noh Soo Han, JunWoo Kim, Kwang Seob Jeong, Tai Hyun Yoon, Minhaeng Cho","doi":"10.1038/s41467-025-60313-3","DOIUrl":null,"url":null,"abstract":"<p>By employing two synchronized mode-locked femtosecond lasers and interferometric detection of the pump-probe spectra—referred to as asynchronous and interferometric transient absorption—we have developed a method for broad dynamic range and rapid data acquisition. Using asynchronous and interferometric transient absorption, we examined photochemical changes during femtosecond pump-probe experiments on all-inorganic cesium lead halide nanomaterials. The laser pulse train facilitates photoreactions while allowing real-time observation of charge carrier dynamics. In perovskite nanocrystals undergoing photo-substitution of halide anions, transient absorption spectra showed increasing bandgap energy and faster relaxation dynamics as the Cl/Br ratio increased. For colloidal perovskite nanoplatelets, continuous observation revealed both spectral and kinetic changes during the light-induced coalescence of nanoplatelets, by analyzing temporal segments. This integrated technique not only deepens understanding of exciton dynamics and environmental influences in perovskite nanomaterials but also establishes asynchronous and interferometric transient absorption as a transformative tool for real-time observation of photochemical dynamics.</p>","PeriodicalId":19066,"journal":{"name":"Nature Communications","volume":"36 1","pages":""},"PeriodicalIF":15.7000,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nature Communications","FirstCategoryId":"103","ListUrlMain":"https://doi.org/10.1038/s41467-025-60313-3","RegionNum":1,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MULTIDISCIPLINARY SCIENCES","Score":null,"Total":0}

引用次数: 0

Abstract

By employing two synchronized mode-locked femtosecond lasers and interferometric detection of the pump-probe spectra—referred to as asynchronous and interferometric transient absorption—we have developed a method for broad dynamic range and rapid data acquisition. Using asynchronous and interferometric transient absorption, we examined photochemical changes during femtosecond pump-probe experiments on all-inorganic cesium lead halide nanomaterials. The laser pulse train facilitates photoreactions while allowing real-time observation of charge carrier dynamics. In perovskite nanocrystals undergoing photo-substitution of halide anions, transient absorption spectra showed increasing bandgap energy and faster relaxation dynamics as the Cl/Br ratio increased. For colloidal perovskite nanoplatelets, continuous observation revealed both spectral and kinetic changes during the light-induced coalescence of nanoplatelets, by analyzing temporal segments. This integrated technique not only deepens understanding of exciton dynamics and environmental influences in perovskite nanomaterials but also establishes asynchronous and interferometric transient absorption as a transformative tool for real-time observation of photochemical dynamics.

Abstract Image

查看原文本刊更多论文

钙钛矿纳米材料中光诱导反应的原位和实时超快光谱

通过使用两个同步锁模飞秒激光器和干涉检测泵浦探测光谱-被称为异步和干涉瞬态吸收-我们开发了一种宽动态范围和快速数据采集的方法。利用非同步和干涉瞬态吸收技术，研究了全无机卤化铯铅纳米材料在飞秒泵浦探测实验中的光化学变化。激光脉冲序列促进光反应，同时允许实时观察电荷载流子动力学。在卤化物阴离子光取代的钙钛矿纳米晶体中，瞬态吸收光谱显示，随着Cl/Br比的增加，带隙能量增加，弛豫动力学加快。对于胶体钙钛矿纳米薄片，通过分析时间片段，连续观察揭示了纳米薄片在光诱导聚并过程中的光谱和动力学变化。这种集成技术不仅加深了对钙钛矿纳米材料中激子动力学和环境影响的理解，而且还建立了异步和干涉瞬态吸收作为实时观察光化学动力学的变革工具。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Nature Communications Biological Science Disciplines-

CiteScore

24.90

自引率

2.40%

发文量

6928

审稿时长

3.7 months

期刊介绍： Nature Communications, an open-access journal, publishes high-quality research spanning all areas of the natural sciences. Papers featured in the journal showcase significant advances relevant to specialists in each respective field. With a 2-year impact factor of 16.6 (2022) and a median time of 8 days from submission to the first editorial decision, Nature Communications is committed to rapid dissemination of research findings. As a multidisciplinary journal, it welcomes contributions from biological, health, physical, chemical, Earth, social, mathematical, applied, and engineering sciences, aiming to highlight important breakthroughs within each domain.