Photonics Research, 2020, 8 (9): 09000A25, Published Online: Aug. 18, 2020  

Influence of mixed organic cations on the nonlinear optical properties of lead tri-iodide perovskites Download: 606次

Author Affiliations
1 Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
2 College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
3 Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, Macau 999078, China
4 Key Laboratory of Energy Conversion and Storage Technologies (Southern University of Science and Technology), Ministry of Education, Shenzhen 518055, China
5 e-mail: tche@szu.edu.cn
6 e-mail: gcxing@um.edu.mo
7 e-mail: chenr@sustech.edu.cn
Abstract
Metal halide perovskite materials have been widely studied recently due to their excellent optoelectronic properties. Among these materials, organic-inorganic hybrid perovskites have attracted much attention because of their relatively soft framework, which makes them more suitable for nonlinear optical (NLO) applications. However, there is rare physical mechanism study on the coexistence of two-photon absorption (TPA) and saturable absorption (SA) in organic-inorganic hybrid perovskite materials. To clarify this issue, the NLO properties of mixed cation perovskite MA1?xFAxPbI3 [MA=CH3NH3,FA=CH(NH2)2, x=0, 0.2, 0.4, 0.6, and 0.8] thin films are investigated in this paper. Based on the nonlinear transmittance and femtosecond-transient absorption spectrum measurements, it is found that the MA1?xFAxPbI3 materials exhibit NLO behavior dependent on excitation intensity. The TPA coefficient of MA1?xFAxPbI3 decreases with the increase of formamidinium (FA) content, while the relevant saturable intensity increases. In addition, it is revealed that the linear absorption process from valence band 2 to valance band 1 still exists even under a very low excitation intensity. With the increase of excitation intensity, the light transmittance at 1300 nm decreases first and then increases sharply, which also supports the explanation for the coexistence of TPA and SA. It is expected that our findings will promote the application of perovskite materials in nonlinear optoelectronic devices.

Xuanyu Zhang, Shuyu Xiao, Ruxue Li, Tingchao He, Guichuan Xing, Rui Chen. Influence of mixed organic cations on the nonlinear optical properties of lead tri-iodide perovskites[J]. Photonics Research, 2020, 8(9): 09000A25.

引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!