Surface Defect Recovery in Perovskite Nanocrystals with Excess Halide for Core–Shell Structure

IF 19.3 1区材料科学 Q1 CHEMISTRY, PHYSICAL

ACS Energy Letters Pub Date : 2024-10-16 DOI:10.1021/acsenergylett.4c0187010.1021/acsenergylett.4c01870

Dong Hyeon Lee, Woo Hyeon Jeong, Seokhyun Choung, Ji Won Jang, Gyudong Lee, Hochan Song, Sanghun Han, Gyeong Eun Seok, Jihoon Kim, Myeonggeun Han, Jeong Woo Han, Hyosung Choi, Jongmin Choi*, Bo Ram Lee* and Yong-Young Noh*,

{"title":"Surface Defect Recovery in Perovskite Nanocrystals with Excess Halide for Core–Shell Structure","authors":"Dong Hyeon Lee, Woo Hyeon Jeong, Seokhyun Choung, Ji Won Jang, Gyudong Lee, Hochan Song, Sanghun Han, Gyeong Eun Seok, Jihoon Kim, Myeonggeun Han, Jeong Woo Han, Hyosung Choi, Jongmin Choi*, Bo Ram Lee* and Yong-Young Noh*, ","doi":"10.1021/acsenergylett.4c0187010.1021/acsenergylett.4c01870","DOIUrl":null,"url":null,"abstract":"We present a method to synthesize stable and uniform high-quality perovskite nanocrystals (PNCs) by using excess halide to recover surface defects in CsPbBr3/ZnS core/shell nanocrystals. Use of N-bromosuccinimide as a halide donor recovered surface halide vacancies of bare CsPbBr3 PNCs during the growth of the ZnS shell, as confirmed by DFT calculations. This approach achieves a high photoluminescence quantum yield of nearly 1, and significantly increases the stability of PNCs under adverse conditions such as high humidity and elevated temperature. CsPbBr3/ZnS PNC light-emitting diodes demonstrated outstanding luminous characteristics, with a remarkable external quantum efficiency of 12.77% and a maximum luminance of 1449 cd m–2 at 517 nm. These characteristics of the PNCs will have a wide variety of applications and will help enable development of highly efficient optoelectronic devices.","PeriodicalId":16,"journal":{"name":"ACS Energy Letters ","volume":"9 11","pages":"5413–5420 5413–5420"},"PeriodicalIF":19.3000,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Energy Letters ","FirstCategoryId":"88","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acsenergylett.4c01870","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

We present a method to synthesize stable and uniform high-quality perovskite nanocrystals (PNCs) by using excess halide to recover surface defects in CsPbBr₃/ZnS core/shell nanocrystals. Use of N-bromosuccinimide as a halide donor recovered surface halide vacancies of bare CsPbBr₃ PNCs during the growth of the ZnS shell, as confirmed by DFT calculations. This approach achieves a high photoluminescence quantum yield of nearly 1, and significantly increases the stability of PNCs under adverse conditions such as high humidity and elevated temperature. CsPbBr₃/ZnS PNC light-emitting diodes demonstrated outstanding luminous characteristics, with a remarkable external quantum efficiency of 12.77% and a maximum luminance of 1449 cd m^–2 at 517 nm. These characteristics of the PNCs will have a wide variety of applications and will help enable development of highly efficient optoelectronic devices.

Abstract Image

查看原文本刊更多论文

具有过量卤化物的核壳结构过氧化物纳米晶体的表面缺陷恢复

我们提出了一种利用过量卤化物恢复 CsPbBr3/ZnS 核/壳纳米晶体表面缺陷，从而合成稳定、均匀的高质量过氧化物纳米晶体（PNCs）的方法。在 ZnS 外壳的生长过程中，使用 N-bromosuccinimide 作为卤化物供体恢复了裸 CsPbBr3 PNCs 的表面卤化物空位，这一点已得到 DFT 计算的证实。这种方法实现了接近 1 的高光量子产率，并显著提高了 PNC 在高湿度和高温等不利条件下的稳定性。CsPbBr3/ZnS PNC 发光二极管具有出色的发光特性，外部量子效率高达 12.77%，在 517 纳米波长下的最大亮度为 1449 cd m-2。PNC 的这些特性将有广泛的应用前景，有助于开发高效光电器件。

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

ACS Energy Letters Energy-Renewable Energy, Sustainability and the Environment

CiteScore

31.20

自引率

5.00%

发文量

469

审稿时长

1 months

期刊介绍： ACS Energy Letters is a monthly journal that publishes papers reporting new scientific advances in energy research. The journal focuses on topics that are of interest to scientists working in the fundamental and applied sciences. Rapid publication is a central criterion for acceptance, and the journal is known for its quick publication times, with an average of 4-6 weeks from submission to web publication in As Soon As Publishable format. ACS Energy Letters is ranked as the number one journal in the Web of Science Electrochemistry category. It also ranks within the top 10 journals for Physical Chemistry, Energy & Fuels, and Nanoscience & Nanotechnology. The journal offers several types of articles, including Letters, Energy Express, Perspectives, Reviews, Editorials, Viewpoints and Energy Focus. Additionally, authors have the option to submit videos that summarize or support the information presented in a Perspective or Review article, which can be highlighted on the journal's website. ACS Energy Letters is abstracted and indexed in Chemical Abstracts Service/SciFinder, EBSCO-summon, PubMed, Web of Science, Scopus and Portico.