| CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES |
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Stability and luminescence properties of CsPbBr3/CdSe/Al core-shell quantum dots |
| Heng Yao(姚恒)1, Anjiang Lu(陆安江)1,†, Zhongchen Bai(白忠臣)1,2, Jinguo Jiang(蒋劲国)1, and Shuijie Qin(秦水介)1,‡ |
1 Guizhou Province Key Laboratory for Photoelectric Technology and Application, Guizhou University, Guiyang 550025, China;
2 College of Medicine, Guizhou University, Guiyang 550025, China |
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Abstract To improve the stability and luminescence properties of CsPbBr3 QDs, we proposed a new core-shell structure for CsPbBr3/CdSe/Al quantum dots (QDs). By using a simple method of ion layer adsorption and a reaction method, CdSe and Al were respectively packaged on the surface of CsPbBr3 QDs to form the core-shell CsPbBr3/CdSe/Al QDs. After one week in a natural environment, the photoluminescence quantum yields of CsPbBr3/CdSe/Al QDs were greater than 80%, and the PL intensity remained at 71% of the original intensity. Furthermore, the CsPbBr3/CdSe/Al QDs were used as green emitters for white light-emitting diodes (LEDs), with the LEDs spectrum covering 129% of the national television system committee (NTSC) standard color gamut. The core-shell structure of QDs can effectively improve the stability of CsPbBr3 QDs, which has promising prospects in optoelectronic devices.
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Received: 27 November 2021
Revised: 26 January 2022
Accepted manuscript online: 02 March 2022
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PACS:
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61.46.-w
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(Structure of nanoscale materials)
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61.46.Df
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(Structure of nanocrystals and nanoparticles ("colloidal" quantum dots but not gate-isolated embedded quantum dots))
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73.63.-b
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(Electronic transport in nanoscale materials and structures)
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78.55.-m
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(Photoluminescence, properties and materials)
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| Fund: This work was supported by the National Natural Science Foundation of China (Grant Nos. 61865002 and 62065002); Project of Outstanding Young Scientific and Technological Talents of Guizhou Province, China (Grant No. QKEPTRC[2019]5650); Guizhou Province Science and Technology Platform and Talent Team Project, China (Grant No. QKEPTRC[2018]5616); and Central Government of China Guiding Local Science and Technology Development Plan (Grant No. QKZYD[2017]4004). |
Corresponding Authors:
Anjiang Lu, Shuijie Qin
E-mail: ajlu@gzu.edu.cn;shuijieqin@163.com
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Cite this article:
Heng Yao(姚恒), Anjiang Lu(陆安江), Zhongchen Bai(白忠臣), Jinguo Jiang(蒋劲国), and Shuijie Qin(秦水介) Stability and luminescence properties of CsPbBr3/CdSe/Al core-shell quantum dots 2022 Chin. Phys. B 31 046106
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