Surface engineering of ZnO nanoparticles with diethylenetriamine for efficient red quantum-dot light-emitting diodes
Summary: Due to the outstanding electron injection/transport capability of ZnO nanoparticles (NPs), quantum-dot light-emitting diodes (QLEDs) are commonly constructed by employing a hybrid device structure with ZnO electron-transporting layer and organic hole-transporting layer. However, the emissio...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-10-01
|
| Series: | iScience |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2589004222013839 |
| _version_ | 1811204379525513216 |
|---|---|
| author | Dandan Zhang Yan-Hua Liu Lianqing Zhu |
| author_facet | Dandan Zhang Yan-Hua Liu Lianqing Zhu |
| author_sort | Dandan Zhang |
| collection | DOAJ |
| description | Summary: Due to the outstanding electron injection/transport capability of ZnO nanoparticles (NPs), quantum-dot light-emitting diodes (QLEDs) are commonly constructed by employing a hybrid device structure with ZnO electron-transporting layer and organic hole-transporting layer. However, the emission quenching of quantum dots and excessive electron injection induced by ZnO NPs also limits the device efficiency and operational stability. Here, diethylenetriamine (DETA) molecules as the ligands are introduced to modify the surface of ZnO NPs, which not only passivate the surface defects of ZnO but also suppress the overwhelming electron injection in the QLED. As a result, the device based on the DETA-modified ZnO NPs exhibits a peak external quantum efficiency of 23.7%, corresponding to an enhancement factor of 129% in comparison with that of the device with as-synthesized ZnO as the electron-transporting layer. The easy and feasible strategy may also be applicable to other photoelectric devices, such as solar cells and photodetectors. |
| first_indexed | 2024-04-12T03:12:19Z |
| format | Article |
| id | doaj.art-780493b379794137a784c82b6069db3d |
| institution | Directory Open Access Journal |
| issn | 2589-0042 |
| language | English |
| last_indexed | 2024-04-12T03:12:19Z |
| publishDate | 2022-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | iScience |
| spelling | doaj.art-780493b379794137a784c82b6069db3d2022-12-22T03:50:19ZengElsevieriScience2589-00422022-10-012510105111Surface engineering of ZnO nanoparticles with diethylenetriamine for efficient red quantum-dot light-emitting diodesDandan Zhang0Yan-Hua Liu1Lianqing Zhu2Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument, Beijing Information Science and Technology University, Beijing 100192, P. R. ChinaSchool of Optoelectronic Science and Engineering, Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou, Jiangsu 215006, P. R. China; Corresponding authorKey Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument, Beijing Information Science and Technology University, Beijing 100192, P. R. China; Corresponding authorSummary: Due to the outstanding electron injection/transport capability of ZnO nanoparticles (NPs), quantum-dot light-emitting diodes (QLEDs) are commonly constructed by employing a hybrid device structure with ZnO electron-transporting layer and organic hole-transporting layer. However, the emission quenching of quantum dots and excessive electron injection induced by ZnO NPs also limits the device efficiency and operational stability. Here, diethylenetriamine (DETA) molecules as the ligands are introduced to modify the surface of ZnO NPs, which not only passivate the surface defects of ZnO but also suppress the overwhelming electron injection in the QLED. As a result, the device based on the DETA-modified ZnO NPs exhibits a peak external quantum efficiency of 23.7%, corresponding to an enhancement factor of 129% in comparison with that of the device with as-synthesized ZnO as the electron-transporting layer. The easy and feasible strategy may also be applicable to other photoelectric devices, such as solar cells and photodetectors.http://www.sciencedirect.com/science/article/pii/S2589004222013839EngineeringNanomaterialsDevices |
| spellingShingle | Dandan Zhang Yan-Hua Liu Lianqing Zhu Surface engineering of ZnO nanoparticles with diethylenetriamine for efficient red quantum-dot light-emitting diodes iScience Engineering Nanomaterials Devices |
| title | Surface engineering of ZnO nanoparticles with diethylenetriamine for efficient red quantum-dot light-emitting diodes |
| title_full | Surface engineering of ZnO nanoparticles with diethylenetriamine for efficient red quantum-dot light-emitting diodes |
| title_fullStr | Surface engineering of ZnO nanoparticles with diethylenetriamine for efficient red quantum-dot light-emitting diodes |
| title_full_unstemmed | Surface engineering of ZnO nanoparticles with diethylenetriamine for efficient red quantum-dot light-emitting diodes |
| title_short | Surface engineering of ZnO nanoparticles with diethylenetriamine for efficient red quantum-dot light-emitting diodes |
| title_sort | surface engineering of zno nanoparticles with diethylenetriamine for efficient red quantum dot light emitting diodes |
| topic | Engineering Nanomaterials Devices |
| url | http://www.sciencedirect.com/science/article/pii/S2589004222013839 |
| work_keys_str_mv | AT dandanzhang surfaceengineeringofznonanoparticleswithdiethylenetriamineforefficientredquantumdotlightemittingdiodes AT yanhualiu surfaceengineeringofznonanoparticleswithdiethylenetriamineforefficientredquantumdotlightemittingdiodes AT lianqingzhu surfaceengineeringofznonanoparticleswithdiethylenetriamineforefficientredquantumdotlightemittingdiodes |