Photophysical Properties of Zn-Alloyed CsPbI3 Nanocrystals

Zhao, Fuli1,2; Li, Junzi3; Yu, Jiahao2; Guo, Zhihang4; Xiao, Shuyu3; Gao, Yang3; Pan, Ruikun4; He, Tingchao3; Chen, Rui2

2020-12-10

10.1021/acs.jpcc.0c08358

Journal of Physical Chemistry C   影响因子和分区

1932-7447

1932-7455

Deep-red luminescence emission makes CsPbI3 nanocrystals (NCs) promising materials for various applications, but their use is limited in practice by instability in moist ambient environments. Incorporating Zn into CsPbI3 NCs can help retain crystallinity and improve moisture resistance and device performance. However, a fundamental understanding of the photophysical properties of Zn-alloyed CsPbI3 NCs remains incomplete. In this study, the differences in the photophysical properties of CsPbI3 NCs and their Zn-alloyed counterparts (CsPb0.8Zn0.2I3 NCs) are highlighted. Femtosecond transient absorption spectroscopy experiments show that the rate of carrier cooling is higher in CsPb0.8Zn0.2I3 NCs than in CsPbI3 NCs, whereas the two types of NCs exhibit similar Auger recombination lifetimes and biexcition binding energies. Our experimental results show more efficient multiphoton absorption by CsPb0.8Zn0.2I3 NCs than by CsPbI3NCs. This result implies that Zn-alloyed CsPbI3 NCs are promising materials for multiphoton-excited emission-relevant applications.

SCI ; EI

英语

通讯

Guangdong Basic and Applied Basic Research Foundation[2019A1515012094] ; Project of Department of Education of Guangdong Province[2018KTSCX19] ; Shenzhen Fundamental Research Project of Science and Technology[JCYJ20190808121211510]

Chemistry ; Science & Technology - Other Topics ; Materials Science

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

WOS:000599610500068

AMER CHEMICAL SOC

20205209668409

Zinc alloys ; Binding energy ; Crystallinity

Zinc and Alloys:546.3 ; Physical Chemistry:801.4 ; Crystalline Solids:933.1

Web of Science

1.Shanghai Dianji Univ, Coll Arts & Sci, Shanghai 201306, Peoples R China
2.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
3.Shenzhen Univ, Minist Educ & Guangdong Prov, Coll Phys & Optoelect Engn, Key Lab Optoelect Devices & Syst, Shenzhen 518060, Peoples R China
4.Hubei Univ, Key Lab Green Preparat & Applicat Funct Mat, Minist Educ, Sch Mat Sci & Engn, Wuhan 430062, Peoples R China

Zhao, Fuli,Li, Junzi,Yu, Jiahao,et al. Photophysical Properties of Zn-Alloyed CsPbI3 Nanocrystals[J]. Journal of Physical Chemistry C,2020,124(49):27169-27175.

Zhao, Fuli.,Li, Junzi.,Yu, Jiahao.,Guo, Zhihang.,Xiao, Shuyu.,...&Chen, Rui.(2020).Photophysical Properties of Zn-Alloyed CsPbI3 Nanocrystals.Journal of Physical Chemistry C,124(49),27169-27175.

Zhao, Fuli,et al."Photophysical Properties of Zn-Alloyed CsPbI3 Nanocrystals".Journal of Physical Chemistry C 124.49(2020):27169-27175.