Multiphoton absorption in low-dimensional cesium copper iodide single crystals

Guo，Zhihang1,2,3; Li，Junzi1,4; Gao，Yang1; Cheng，Jiaji1,3; Zhang，Wenjing4; Pan，Ruikun3; Chen，Rui2; He，Tingchao1

2020-12-21

10.1039/d0tc04061d

Journal of Materials Chemistry C   影响因子和分区

2050-7534

2050-7526

Low-dimensional lead-free metal halides, which feature strong quantum confinement effects, have recently attracted great attention due to their excellent optical properties and favorable stability under ambient conditions. Although controllable synthetic strategies, structural characterization and linear optical properties of lead-free metal halides have been widely reported, relevant studies on their nonlinear optical properties are still lacking, which hinders their applications in nonlinear photonic devices. Herein, two types of millimeter-level high-crystallinity cesium copper halide single crystals (SCs), i.e., Cs3Cu2I5 and CsCu2I3, with high photoluminescence (PL) quantum yields, are synthesized using an antisolvent vapor-assisted crystallization method. Their phonon energies are comparatively studied by using Raman spectroscopy and temperature-dependent PL spectroscopy. More importantly, comparison studies of the multiphoton absorption (MPA) properties of Cs3Cu2I5 and CsCu2I3 SCs are performed for the first time. Strong multiphoton excited PL emissions with large anisotropy factors are observed in these two types of SCs. Through the measurement of nonlinear transmittance, it is found that CsCu2I3 SCs exhibit much larger MPA coefficients compared with Cs3Cu2I5 SCs, which is attributed to the larger density of states in the former. This work broadens the applications of cesium copper halides in nonlinear optoelectronics and light polarization related devices.

SCI ; EI

英语

其他

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

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied

WOS:000600128000028

ROYAL SOC CHEMISTRY

20205209691099

Optical properties ; Crystallinity ; Photonic devices ; Metal halides ; Photons ; Lead compounds ; Cesium compounds ; Nonlinear optics ; Copper compounds ; Perovskite

Minerals:482.2 ; Light/Optics:741.1 ; Nonlinear Optics:741.1.1 ; Optical Devices and Systems:741.3 ; Chemical Products Generally:804 ; Atomic and Molecular Physics:931.3 ; Crystalline Solids:933.1

2-s2.0-85098213565

Scopus

1.Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province,College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen,518060,China
2.Department of Electrical and Electronic Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Key Laboratory of Green Preparation and Application for Functional Materials,Ministry of Education,School of Materials Science and Engineering,Hubei University,Wuhan,430062,China
4.SZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology,Intl. Collab. Lab. of 2D Mat. for Optoelectronics Science and Technology of Ministry of Education,College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen,518060,China

Guo，Zhihang,Li，Junzi,Gao，Yang,et al. Multiphoton absorption in low-dimensional cesium copper iodide single crystals[J]. Journal of Materials Chemistry C,2020,8(47):16923-16929.

Guo，Zhihang.,Li，Junzi.,Gao，Yang.,Cheng，Jiaji.,Zhang，Wenjing.,...&He，Tingchao.(2020).Multiphoton absorption in low-dimensional cesium copper iodide single crystals.Journal of Materials Chemistry C,8(47),16923-16929.

Guo，Zhihang,et al."Multiphoton absorption in low-dimensional cesium copper iodide single crystals".Journal of Materials Chemistry C 8.47(2020):16923-16929.