{"title":"Electro-optic properties of double-type emission of organic electroluminescence device","authors":"I. Helzhynskyy, S. Kutsiy, S. Albota","doi":"10.3116/16091833/22/1/53/2021","DOIUrl":null,"url":null,"abstract":". We study electroluminescence and impedance properties of a double-type white organic light-emitting device (WOLED) based on phosphorescent and thermally activated delayed fluorescence emissions in a single heterostructure. Current–voltage characteristics of the WOLED and impedance spectroscopy data are obtained for the layered and composite-layer devices. These results demonstrate that a combination of layer-based and composite-based technologies in a single heterostructure improves both the efficiency and the stability of WOLED heterostructures. Light-emission performance of the WOLED is also studied. The device reveals very good electroluminescence properties and colour coordinates as a white light source. Its maximal brightness is larger than 10 4 cd/m 2 and the maximal external quantum efficiency is larger than 12%.","PeriodicalId":3,"journal":{"name":"ACS Applied Electronic Materials","volume":null,"pages":null},"PeriodicalIF":4.3000,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Applied Electronic Materials","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.3116/16091833/22/1/53/2021","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
. We study electroluminescence and impedance properties of a double-type white organic light-emitting device (WOLED) based on phosphorescent and thermally activated delayed fluorescence emissions in a single heterostructure. Current–voltage characteristics of the WOLED and impedance spectroscopy data are obtained for the layered and composite-layer devices. These results demonstrate that a combination of layer-based and composite-based technologies in a single heterostructure improves both the efficiency and the stability of WOLED heterostructures. Light-emission performance of the WOLED is also studied. The device reveals very good electroluminescence properties and colour coordinates as a white light source. Its maximal brightness is larger than 10 4 cd/m 2 and the maximal external quantum efficiency is larger than 12%.