Enhancing the stability of environmental resistance of alloyed CdZnSeS@ZnS quantum dots by doping Ti ions into shell layer

Fang, Fan1,2,3,4; Liu, Haochen2,3,4; Wen, Zuoliang2,3; Liu, Chenxi4; Xu, Bing5; Zhang, Zhikuan5; Wang, Kai2,3,4; Ertugrul, Mehmet6,7,8,9; Lei, Wei1; Sun, Xiao Wei2,3,4

2022-12-10

10.1088/1361-6528/ac923c

NANOTECHNOLOGY   Impact Factor & Quartile

0957-4484

1361-6528

Colloidal quantum dots (QDs) are promising luminescent materials for display and lighting, but their stability has long been an issue. Here, we designed a passivation strategy of doping Ti ions into the shell of alloyed CdZnSeS@ZnS QDs. The results showed that Ti ions were successfully doped into the ZnS shell and the stability of QDs was improved. In the aging test, the Ti ions doped QDs maintained 51.4% of the initial performance after 90 h of aging, while the pristine QDs decreased to less than 25% of the initial value. In addition, we discuss the reasons why Ti ions doping improves the stability of QDs. Ti ions are found to form Ti-S bonds in the ZnS shell, which has high binding energy and strong oxidation resistance. Most importantly, since there is no external physical insulating coating, the optimized QDs can also be directly used in electroluminescent devices, showing great potential in electroluminescence applications.

quantum dots CdZnSeS@ZnS Ti ions doping stability oxidation resistance

SCI

English

Corresponding

National Natural Science Foundation of China["61875082","61405089","62005115"] ; Key-Area Research and Development Program of Guangdong Province["2019B010925001","2019B010924001"] ; Shenzhen Peacock Team Project[KQTD2016030111203005] ; Shenzhen Key Laboratory for Advanced Quantum Dot Displays and Lighting[ZDSYS201707281632549] ; Natural Science Foundation of Jiangsu Province[BK20190774] ; Jiangsu Province College Graduate Research Innovation Program[KYCX20_0104] ; Fundamental Research Funds for the Central Universities[YJ201955]

Science & Technology - Other Topics ; Materials Science ; Physics

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied

WOS:000863492800001

IOP Publishing Ltd

MATERIALS SCIENCE

Web of Science

1.Southeast Univ, Sch Elect Sci & Engn, Nanjing 210096, Peoples R China
2.Southern Univ Sci & Technol, Guangdong Univ, Key Lab Adv Quantum Dot Displays & Lighting, Guangdong Hong Kong Macao Joint Lab Photon Therma, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
4.Southern Univ Sci & Technol, Minist Educ, Key Lab Energy Convers & Storage Technol, Shenzhen 518055, Peoples R China
5.Shenzhen Planck Innovat Technol Co Ltd, Shenzhen 518055, Peoples R China
6.Ataturk Univ, Fac Engn, Dept Elect & Elect Engn, TR-25240 Erzurum, Turkey
7.Ataturk Univ, Fac Engn, Dept Nanosci & Nanoengn, TR-25240 Erzurum, Turkey
8.Univ Putra Malaysia, Fac Engn, Dept Elect & Elect Engn, Serdang 43400, Malaysia
9.Manas Univ, Fac Engn, Dept Elect Engn, Bishkek 720044, Kyrgyzstan

Fang, Fan,Liu, Haochen,Wen, Zuoliang,et al. Enhancing the stability of environmental resistance of alloyed CdZnSeS@ZnS quantum dots by doping Ti ions into shell layer[J]. NANOTECHNOLOGY,2022,33(50).

Fang, Fan.,Liu, Haochen.,Wen, Zuoliang.,Liu, Chenxi.,Xu, Bing.,...&Sun, Xiao Wei.(2022).Enhancing the stability of environmental resistance of alloyed CdZnSeS@ZnS quantum dots by doping Ti ions into shell layer.NANOTECHNOLOGY,33(50).

Fang, Fan,et al."Enhancing the stability of environmental resistance of alloyed CdZnSeS@ZnS quantum dots by doping Ti ions into shell layer".NANOTECHNOLOGY 33.50(2022).