Silica encapsulation of metal perovskite nanocrystals in a photoluminescence type display application

Mei, Ming1,2; Han, Zidong2; Liu, Peizhao2; Fang, Fan2; Chen, Wei2; Hao, Junjie2; Wu, Dan2,3; Pan, Ruikun1; Cao, Wanqiang1; Wang, Kai2

2019-09-27

10.1088/1361-6528/ab2a33

NANOTECHNOLOGY   影响因子和分区

0957-4484

1361-6528

Perovskite nanocrystals (PeNCs) are attractive in high-color gamut display technology as light converters which can achieve saturated green and red lights, respectively. However, PeNCs are intrinsically fragile against ambient conditions, such as moisture and oxygen and it is hard to maintain their performance in long-term operation. In this work, a new hierarchical encapsulation method is proposed, integrated with surface modification by halide ions protection, nano-scaled encapsulation by in situ capping SiO2 and embedding into poly (methyl methacrylate) (PMMA) matrix composites, to achieve a stable perovskite light converting composite sheet for LED remote-type encapsulation. The storage stability, as well as the operational stability of perovskite composites, were confirmed by the spectra evolution from encapsulated LEDs with normalized blue emission intensity. The 2D maps of spectra and aging measurement indicate that the silica encapsulation can well protect the PeNCs in the PMMA matrix from the ambient circumstance during a long-term storage process. Additionally, the hierarchical encapsulation for PeNCs/silica/PMMA showed better operational stability than the direct encapsulation of PeNCs/PMMA, and the correspondent Commission Internationale de L'Eclairage color coordinates tracking also indicated more stable color properties, which demonstrates the great potential in photoluminescent display applications.

perovskite nanocrystals encapsulation display stability photoluminescence

SCI ; EI

英语

通讯

Distinguished Young Scholar of National Natural Science Foundation of Guangdong[2017B030306010]

Science & Technology - Other Topics ; Materials Science ; Physics

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

WOS:000475396800002

IOP PUBLISHING LTD

20193107259165

Color ; Esters ; Light emitting diodes ; Nanocrystals ; Silica

Minerals:482.2 ; Semiconductor Devices and Integrated Circuits:714.2 ; Light/Optics:741.1 ; Nanotechnology:761 ; Organic Compounds:804.1

MATERIALS SCIENCE

Web of Science

1.Hubei Univ, Sch Mat Sci & Engn, Youyi Str 368, Wuhan 430062, Hubei, Peoples R China
2.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Xueyuan Blvd 1088, Shenzhen 518055, Guangdong, Peoples R China
3.Southern Univ Sci & Technol, Acad Adv Interdisciplinary Studies, Xueyuan Blvd 1088, Shenzhen 518055, Guangdong, Peoples R China

Mei, Ming,Han, Zidong,Liu, Peizhao,et al. Silica encapsulation of metal perovskite nanocrystals in a photoluminescence type display application[J]. NANOTECHNOLOGY,2019,30(39).

Mei, Ming.,Han, Zidong.,Liu, Peizhao.,Fang, Fan.,Chen, Wei.,...&Wang, Kai.(2019).Silica encapsulation of metal perovskite nanocrystals in a photoluminescence type display application.NANOTECHNOLOGY,30(39).

Mei, Ming,et al."Silica encapsulation of metal perovskite nanocrystals in a photoluminescence type display application".NANOTECHNOLOGY 30.39(2019).