Outstanding nonlinear optical properties of all-inorganic perovskite CsPbX3 (X=Cl, Br, I) precursor solutions and polycrystalline films

Yue Fu; Srinivasa Rao Konda; Rashid A Ganeev; Vyacheslav V Kim; Ganjaboy S Boltaev; Ran Wang; Weili Yu; Wei Li

doi:10.1016/j.isci.2023.108514

Outstanding nonlinear optical properties of all-inorganic perovskite CsPbX₃ (X=Cl, Br, I) precursor solutions and polycrystalline films

iScience. 2023 Nov 23;26(12):108514. doi: 10.1016/j.isci.2023.108514. eCollection 2023 Dec 15.

Authors

Yue Fu^{1

2}, Srinivasa Rao Konda¹, Rashid A Ganeev^{1

3

4

5

6}, Vyacheslav V Kim^{1

3

4

6}, Ganjaboy S Boltaev^{1

3

6}, Ran Wang², Weili Yu¹, Wei Li¹

Affiliations

¹ The GPL Photonics Laboratory, State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin 130033, China.
² Microelectronics Instruments and Equipments R&D Center, Institute of Microelectronics of Chinese Academy of Sciences, Beijing 100029, China.
³ Institute of Fundamental and Applied Research, TIIAME National Research University, Kori Niyoziy 39, Tashkent 100000, Uzbekistan.
⁴ Laboratory of Nonlinear Optics, Institute of Astronomy, University of Latvia, Jelgavas iela 3, 1004 Riga, Latvia.
⁵ Department of Physics, Voronezh State University, Voronezh 394006, Russia.
⁶ Chirchik State Pedagogical University, 104 Amir Temur, Chirchik 111700, Uzbekistan.

Abstract

In this work, we systematically explore the third-order nonlinear optical properties of all-inorganic CsPbX₃ (X = Cl, Br, I) perovskite precursor solutions and thin films using femtosecond and nanosecond laser pulses. We show that these samples possess strong two-photon absorption (TPA) and reverse saturable absorption (RSA), which depend on the excitation wavelength. The obtained nonlinear absorption and refraction coefficients for precursor solutions are followed by the relation CsPbCl₃ > CsPbBr₃ > CsPbI₃ for the 800 and 1,064 nm excitation wavelengths, whereas this relation became reverse in the case of 355 and 400 nm laser pulses. It was shown that CsPbCl₃ thin film possesses RSA at 400 nm, CsPbCI₃ shows RSA+ saturable absorption (SA), and CsPbBr₃ demonstrates SA + RSA. In addition, at 800 nm excitation, the CsPbBr₃ thin films show SA + RSA at low peak intensity, and the absorption becomes reverse (TPA+SA) with a further increase in the input laser intensity. The suitability of nonlinear absorption depends on the band gap of the thin films with respect to the pumping photon energy. Our studies demonstrate that these perovskites can be used as the excellent materials for the all-optical signal processing.

Keywords: Materials science; Optics; Physics.