Deep Blue Emission of All-Bromide-Based Cesium Lead Perovskite Nanocrystals

Shi，Huafeng1,3; Zhang，Xiaoli2; Sun，Xiaowei3; Zhang，Xinhai3

2020-01-16

10.1021/acs.jpcc.9b10561

Journal of Physical Chemistry C   影响因子和分区

1932-7447

1932-7455

All-inorganic perovskites have attracted intensive research attention. By adjusting halogen X (X = Cl, Br, and I), perovskite ABX can be used in blue, green, and red light sources. However, it is very hard to avoid halogen exchange when different halide perovskite nanocrystals are used together for optoelectronic devices. We synthesized all-bromide-based cesium lead perovskite nanocrystals with deep blue emission at 405 (±1) nm. The photoluminescence quantum yield can be up to 22 (±3)%. The transmission electron microscopy results confirm the single-crystalline structure of the perovskite CsPbBr nanocrystals. The large Stokes shift of deep blue emission mainly results from the charge-transfer state. These all-bromide-based deep blue emission perovskite nanocrystals avoid the halogen exchange. Our results show that the all-bromide perovskite nanocrystals have great potential for a blue light-emitting source.

SCI ; EI

英语

通讯

Shenzhen basic research project[JCYJ20170817112012493]

Chemistry ; Science & Technology - Other Topics ; Materials Science

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

WOS:000508467700043

American Chemical Society

20200608139493

Bromine compounds ; Cesium ; Cesium compounds ; Charge transfer ; High resolution transmission electron microscopy ; Lead compounds ; Light emission ; Light sources ; Nanocrystals ; Optoelectronic devices ; Supercomputers

Minerals:482.2 ; Alkali Metals:549.1 ; Digital Computers and Systems:722.4 ; Light/Optics:741.1 ; Optical Devices and Systems:741.3 ; Nanotechnology:761 ; Chemical Reactions:802.2

2-s2.0-85078968113

Scopus

1.Harbin Institute of Technology,Harbin,150001,China
2.College of Science and Technology,Chinese University of Hong Kong,Shenzhen,518172,China
3.Department of Electrical and Electronic Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Shi，Huafeng,Zhang，Xiaoli,Sun，Xiaowei,et al. Deep Blue Emission of All-Bromide-Based Cesium Lead Perovskite Nanocrystals[J]. Journal of Physical Chemistry C,2020,124(2):1617-1622.

Shi，Huafeng,Zhang，Xiaoli,Sun，Xiaowei,&Zhang，Xinhai.(2020).Deep Blue Emission of All-Bromide-Based Cesium Lead Perovskite Nanocrystals.Journal of Physical Chemistry C,124(2),1617-1622.

Shi，Huafeng,et al."Deep Blue Emission of All-Bromide-Based Cesium Lead Perovskite Nanocrystals".Journal of Physical Chemistry C 124.2(2020):1617-1622.