Dongyu Li, Benzheng Lyu, Jiayun Sun, Qi Xiong, Hanwen Zhu, Zhengyan Jiang, Dezhong Zhang, Chunyu Liu and Wallace C. H. Choy*,
{"title":"混合卤化物过氧化物发光二极管中的纯蓝光发射由溶解性原理控制的配体优化","authors":"Dongyu Li, Benzheng Lyu, Jiayun Sun, Qi Xiong, Hanwen Zhu, Zhengyan Jiang, Dezhong Zhang, Chunyu Liu and Wallace C. H. Choy*, ","doi":"10.1021/acsenergylett.4c00881","DOIUrl":null,"url":null,"abstract":"<p >Mixed-chloride/bromide perovskite nanocrystals (PeNCs) possess unique advantages for pure blue emission but suffer from severe halogen segregation. While ligand exchange is a promising method to improve stability, there are limited studies on comparative evaluation of the ligand ion pair combinations. We conduct a comprehensive investigation of the ligand exchange process by combining different ion pairs. Surprisingly, changes of ligand ion combinations cause a deviation from pure blue emission of CsPbBr<sub><i>x</i></sub>Cl<sub>3–<i>x</i></sub>, even without intentional halogen alteration. This spectral shift is attributed to the halogen redistribution, which is dominated by the solubility principle in a nonpolar environment. With a detailed ligand-exchange study, we demonstrate pure-blue perovskite light-emitting diodes (PeLEDs) with an external quantum efficiency (EQE) of 7.45% and an operational half-lifetime (<i>T</i><sub>50</sub>) of 61 min at an initial luminance of 100 cd m<sup>–2</sup>. Our findings provide a ligand selection guideline and promote mixed-halide, pure blue PeLEDs for practical applications.</p>","PeriodicalId":16,"journal":{"name":"ACS Energy Letters ","volume":null,"pages":null},"PeriodicalIF":19.3000,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Ligands Optimization Governed by Solubility Principles for Pure Blue Emission in Mixed-Halide Perovskite LEDs\",\"authors\":\"Dongyu Li, Benzheng Lyu, Jiayun Sun, Qi Xiong, Hanwen Zhu, Zhengyan Jiang, Dezhong Zhang, Chunyu Liu and Wallace C. H. Choy*, \",\"doi\":\"10.1021/acsenergylett.4c00881\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >Mixed-chloride/bromide perovskite nanocrystals (PeNCs) possess unique advantages for pure blue emission but suffer from severe halogen segregation. While ligand exchange is a promising method to improve stability, there are limited studies on comparative evaluation of the ligand ion pair combinations. We conduct a comprehensive investigation of the ligand exchange process by combining different ion pairs. Surprisingly, changes of ligand ion combinations cause a deviation from pure blue emission of CsPbBr<sub><i>x</i></sub>Cl<sub>3–<i>x</i></sub>, even without intentional halogen alteration. This spectral shift is attributed to the halogen redistribution, which is dominated by the solubility principle in a nonpolar environment. With a detailed ligand-exchange study, we demonstrate pure-blue perovskite light-emitting diodes (PeLEDs) with an external quantum efficiency (EQE) of 7.45% and an operational half-lifetime (<i>T</i><sub>50</sub>) of 61 min at an initial luminance of 100 cd m<sup>–2</sup>. Our findings provide a ligand selection guideline and promote mixed-halide, pure blue PeLEDs for practical applications.</p>\",\"PeriodicalId\":16,\"journal\":{\"name\":\"ACS Energy Letters \",\"volume\":null,\"pages\":null},\"PeriodicalIF\":19.3000,\"publicationDate\":\"2024-06-07\",\"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.4c00881\",\"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}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Energy Letters ","FirstCategoryId":"88","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acsenergylett.4c00881","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}
Ligands Optimization Governed by Solubility Principles for Pure Blue Emission in Mixed-Halide Perovskite LEDs
Mixed-chloride/bromide perovskite nanocrystals (PeNCs) possess unique advantages for pure blue emission but suffer from severe halogen segregation. While ligand exchange is a promising method to improve stability, there are limited studies on comparative evaluation of the ligand ion pair combinations. We conduct a comprehensive investigation of the ligand exchange process by combining different ion pairs. Surprisingly, changes of ligand ion combinations cause a deviation from pure blue emission of CsPbBrxCl3–x, even without intentional halogen alteration. This spectral shift is attributed to the halogen redistribution, which is dominated by the solubility principle in a nonpolar environment. With a detailed ligand-exchange study, we demonstrate pure-blue perovskite light-emitting diodes (PeLEDs) with an external quantum efficiency (EQE) of 7.45% and an operational half-lifetime (T50) of 61 min at an initial luminance of 100 cd m–2. Our findings provide a ligand selection guideline and promote mixed-halide, pure blue PeLEDs for practical applications.
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.