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Improved performance of quantum dot light emitting diode by modulating electron injection with yttrium-doped ZnO nanoparticles
Li, Jingling1,2,3; Guo, Qiling1,2; Jin, Hu1,2,3; Wang, Kelai1,2,4; Xu, Dehua1,2; Xu, Yongjun5; Xu, Gang1,2,3; Xu, Xueqing1,2,3
2017-10-07
Source PublicationJOURNAL OF APPLIED PHYSICS
Volume122Issue:13
AbstractIn a typical light emitting diode (QD-LED), with ZnO nanoparticles (NPs) serving as the electron transport layer (ETL) material, excessive electron injection driven by the matching conduction band maximum (CBM) between the QD and this oxide layer usually causes charge imbalance and degrades the device performance. To address this issue, the electronic structure of ZnO NPs is modified by the yttrium (Y) doping method. We demonstrate that the CBM of ZnO NPs has a strong dependence on the Y-doping concentration, which can be tuned from 3.55 to 2.77 eV as the Y doping content increases from 0% to 9.6%. This CBM variation generates an enlarged barrier between the cathode and this ZnO ETL benefits from the modulation of electron injection. By optimizing electron injection with the use of a low Y-doped (2%) ZnO to achieve charge balance in the QD-LED, device performance is significantly improved with maximum luminance, peak current efficiency, and maximal external quantum efficiency increase from 4918 cd/m(2), 11.3 cd/A, and 4.5% to 11,171 cd/m(2), 18.3 cd/A, and 7.3%, respectively. This facile strategy based on the ETL modification enriches the methodology of promoting QD-LED performance. Published by AIP Publishing.
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1063/1.4991661
WOS Subject ExtendedPhysics
WOS KeywordHOLE TRANSPORT LAYERS ; HIGH-EFFICIENCY ; DEVICES ; BRIGHT ; ELECTROLUMINESCENCE ; MULTILAYER ; EMISSION ; POLYMER
Indexed BySCI
Language英语
Funding OrganizationNational Natural Science Foundation of China(21273241) ; Natural Science Foundation of Guangdong Province(2015A030310501) ; Project on the Collaborative Innovation and Environmental Construction Platform of Guangdong Province(2014A050503051) ; Key Project on Synergy Collaborative Innovation of Guangzhou City(201704030069) ; Key Project of Science and Technology of Dongguan City
WOS SubjectPhysics, Applied
WOS IDWOS:000412328400048
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/16303
Collection中国科学院广州能源研究所
Affiliation1.Chinese Acad Sci, Guangzhou Inst Energy Convers, CAS Key Lab Renewable Energy, Guangzhou 510640, Guangdong, Peoples R China
2.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Guangdong, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Guangdong Univ Technol, Sch Chem Engn & Light Ind, Guangzhou 510006, Guangdong, Peoples R China
5.Dongguan Univ Technol, Dongguan 523808, Peoples R China
First Author AffilicationGuangZhou Institute of Energy Conversion,Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Li, Jingling,Guo, Qiling,Jin, Hu,et al. Improved performance of quantum dot light emitting diode by modulating electron injection with yttrium-doped ZnO nanoparticles[J]. JOURNAL OF APPLIED PHYSICS,2017,122(13).
APA Li, Jingling.,Guo, Qiling.,Jin, Hu.,Wang, Kelai.,Xu, Dehua.,...&Xu, Xueqing.(2017).Improved performance of quantum dot light emitting diode by modulating electron injection with yttrium-doped ZnO nanoparticles.JOURNAL OF APPLIED PHYSICS,122(13).
MLA Li, Jingling,et al."Improved performance of quantum dot light emitting diode by modulating electron injection with yttrium-doped ZnO nanoparticles".JOURNAL OF APPLIED PHYSICS 122.13(2017).
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