Stability and luminescence properties of CsPbBr3/CdSe/Al core-shell quantum dots

doi:10.1088/1674-1056/ac5978

中国物理B ›› 2022, Vol. 31 ›› Issue (4): 46106-046106.doi: 10.1088/1674-1056/ac5978

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

收稿日期:2021-11-27 修回日期:2022-01-26 接受日期:2022-03-02 出版日期:2022-03-16 发布日期:2022-03-21
通讯作者: Anjiang Lu, Shuijie Qin E-mail:ajlu@gzu.edu.cn;shuijieqin@163.com
基金资助:
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).

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

Received:2021-11-27 Revised:2022-01-26 Accepted:2022-03-02 Online:2022-03-16 Published:2022-03-21
Contact: Anjiang Lu, Shuijie Qin E-mail:ajlu@gzu.edu.cn;shuijieqin@163.com
Supported by:
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).

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摘要/Abstract

摘要： 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.

关键词: luminescence properties, stability, CsPbBr₃/CdSe/Al quantum dots (QDs), CsPbBr₃ QDs

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.

Key words: luminescence properties, stability, CsPbBr₃/CdSe/Al quantum dots (QDs), CsPbBr₃ QDs

中图分类号: (Structure of nanoscale materials)

61.46.-w

61.46.Df (Structure of nanocrystals and nanoparticles ("colloidal" quantum dots but not gate-isolated embedded quantum dots)) 73.63.-b (Electronic transport in nanoscale materials and structures) 78.55.-m (Photoluminescence, properties and materials)

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[J]. 中国物理B, 2022, 31(4): 46106-046106.

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Stability and luminescence properties of CsPbBr₃/CdSe/Al core-shell quantum dots

Stability and luminescence properties of CsPbBr₃/CdSe/Al core-shell quantum dots

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