Effects of Material Dimensionality on the Optical Properties of CsPbBr3 Nanomaterials

Zhang, Xuanyu1,2; Gao, Xian3; Pang, Guotao3; He, Tingchao4; Xing, Guichuan5; Chen, Rui3

2019-11-28

10.1021/acs.jpcc.9b08606

Journal of Physical Chemistry C   影响因子和分区

1932-7447

1932-7455

Inorganic perovskites such as CsPbBr3 have attracted intensive research attention due to their excellent thermal stability and high photoluminescence quantum efficiency. With the decrease of the material's dimension, quantum confinement effects will take place, which will induce many interesting properties. Here, quasi two-dimensional perovskite nanoplatelets (NPLs) and three-dimensional perovskite nanocrystals (NCs) have been grown, and their optical properties have been compared and discussed. It is interesting to find that the photon energy of CsPbBr3 NPLs hardly changes with temperature due to strong electron-phonon interaction. At the same time, the strong quantum confinement effect results in a smaller Stokes shift and a faster fluorescence lifetime. In addition, although the NPLs have many surface defects, they exhibit a relatively strong negative thermal quenching effect of emission. These results demonstrate the unique optical properties of perovskite NPLs that can pave the way for future nanoscale devices.

SCI ; EI

英语

通讯

University of Macau[MYRG2018-00148-IAPME]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000500417600043

AMER CHEMICAL SOC

20194807754077

Bromine compounds ; Electron-phonon interactions ; Lead compounds ; Perovskite ; Quantum confinement ; Surface defects

Minerals:482.2 ; Light/Optics:741.1 ; Solid State Physics:933 ; Materials Science:951

Web of Science

1.Nanjing Tech Univ, Jiangsu Natl Synerget Innovat Ctr Adv Mat, Key Lab Flexible Elect, 30 South Puzhu Rd, Nanjing 211816, Jiangsu, Peoples R China
2.Nanjing Tech Univ, Jiangsu Natl Synerget Innovat Ctr Adv Mat, Inst Adv Mat, 30 South Puzhu Rd, Nanjing 211816, Jiangsu, Peoples R China
3.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Guangdong, Peoples R China
4.Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Guangdong, Peoples R China
5.Univ Macau, Inst Appl Phys & Mat Engn, Ave Univ, Taipa, Macau, Peoples R China

Zhang, Xuanyu,Gao, Xian,Pang, Guotao,et al. Effects of Material Dimensionality on the Optical Properties of CsPbBr3 Nanomaterials[J]. Journal of Physical Chemistry C,2019,123(47):28893-28897.

Zhang, Xuanyu,Gao, Xian,Pang, Guotao,He, Tingchao,Xing, Guichuan,&Chen, Rui.(2019).Effects of Material Dimensionality on the Optical Properties of CsPbBr3 Nanomaterials.Journal of Physical Chemistry C,123(47),28893-28897.

Zhang, Xuanyu,et al."Effects of Material Dimensionality on the Optical Properties of CsPbBr3 Nanomaterials".Journal of Physical Chemistry C 123.47(2019):28893-28897.