Experimental and first-principles analyses of oxidative defect removal in eco-friendly InP quantum dot synthesis via in situ HF etching

IF 13.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2025-03-29 DOI:10.1016/j.cej.2025.162134

Awais Ali, Faisal Rehman, Tridip Das, Muhammad Imran, Junhyeok Park, Seongkeun Oh, Hanseok Seo, Young Kyun Choi, William A Goddard, Soong Ju Oh

{"title":"Experimental and first-principles analyses of oxidative defect removal in eco-friendly InP quantum dot synthesis via in situ HF etching","authors":"Awais Ali, Faisal Rehman, Tridip Das, Muhammad Imran, Junhyeok Park, Seongkeun Oh, Hanseok Seo, Young Kyun Choi, William A Goddard, Soong Ju Oh","doi":"10.1016/j.cej.2025.162134","DOIUrl":null,"url":null,"abstract":"Indium phosphide (InP) colloidal quantum dots (QDs) are promising for next-generation displays. However, synthetic reliance on the addition of aqueous hydrofluoric acid (HF) during the reaction for oxygen-sensitive materials, such as InP QDs, makes synthesis challenging and less safe. Herein, we report a safer, oxygen-free synthetic route for high-quality InP QDs by combining tri(dimethylamino)phosphine [(DMA)3P] (as the phosphorus source) and ZnF2 as an additive in an alkylamine solvent. ZnF2 in situ produces HF, which suppresses the formation of polyphosphates (P2O7x−) and mixed oxides (InPOx) and enables the growth of high-quality QDs. Subsequent growth of ZnSe/ZnS shells result in core/shell/shell QDs with enhanced photoluminescence quantum yield (PLQY) of 93% and 88% for red and green-emitting QDs. We report, as a result, red and green light-emitting diodes (LEDs) with external quantum efficiencies (EQEs) of 11.8% and 7.5%, respectively. Our in situ acid management strategy provides a safer way to use HF to etch out oxidative surfaces during the growth of QDs","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"2 1","pages":""},"PeriodicalIF":13.3000,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemical Engineering Journal","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1016/j.cej.2025.162134","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}

引用次数: 0

Abstract

Indium phosphide (InP) colloidal quantum dots (QDs) are promising for next-generation displays. However, synthetic reliance on the addition of aqueous hydrofluoric acid (HF) during the reaction for oxygen-sensitive materials, such as InP QDs, makes synthesis challenging and less safe. Herein, we report a safer, oxygen-free synthetic route for high-quality InP QDs by combining tri(dimethylamino)phosphine [(DMA)₃P] (as the phosphorus source) and ZnF₂ as an additive in an alkylamine solvent. ZnF₂ in situ produces HF, which suppresses the formation of polyphosphates (P₂O₇^x−) and mixed oxides (InPO_x) and enables the growth of high-quality QDs. Subsequent growth of ZnSe/ZnS shells result in core/shell/shell QDs with enhanced photoluminescence quantum yield (PLQY) of 93% and 88% for red and green-emitting QDs. We report, as a result, red and green light-emitting diodes (LEDs) with external quantum efficiencies (EQEs) of 11.8% and 7.5%, respectively. Our in situ acid management strategy provides a safer way to use HF to etch out oxidative surfaces during the growth of QDs

Abstract Image

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.