中国物理B ›› 2023, Vol. 32 ›› Issue (6): 64212-064212.doi: 10.1088/1674-1056/acb203

所属专题： SPECIAL TOPIC — Celebrating the 100th Anniversary of Physics Discipline of Xiamen University

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Two-photon absorption of FAPbBr3 perovskite nanocrystals

Xuanyu Zhang(张轩宇)1, Shuyu Xiao(肖书宇)2, Xiongbin Wang(王雄彬)1, Tingchao He(贺廷超)2, and Rui Chen(陈锐)1,†   

  1. 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
  • 收稿日期:2022-12-12 修回日期:2023-01-07 接受日期:2023-01-11 出版日期:2023-05-17 发布日期:2023-05-17
  • 通讯作者: Rui Chen E-mail:chenr@sustech.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 62174079) and the Fund from the Science, Technology, and Innovation Commission of Shenzhen Municipality (Grant Nos. JCYJ20220530113015035, JCYJ20210324120204011, JCYJ20190808121211510, and KQTD2015071710313656).

Two-photon absorption of FAPbBr3 perovskite nanocrystals

Xuanyu Zhang(张轩宇)1, Shuyu Xiao(肖书宇)2, Xiongbin Wang(王雄彬)1, Tingchao He(贺廷超)2, and Rui Chen(陈锐)1,†   

  1. 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
  • Received:2022-12-12 Revised:2023-01-07 Accepted:2023-01-11 Online:2023-05-17 Published:2023-05-17
  • Contact: Rui Chen E-mail:chenr@sustech.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 62174079) and the Fund from the Science, Technology, and Innovation Commission of Shenzhen Municipality (Grant Nos. JCYJ20220530113015035, JCYJ20210324120204011, JCYJ20190808121211510, and KQTD2015071710313656).

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摘要： Perovskite nanocrystals (NCs) with high two-photon absorption (TPA) cross-section are of great interest due to their potential applications in three-dimensional optical data storage and multiphoton fluorescence microscopy. Among various perovskite materials, FAPbBr$_{3}$ NCs show a better development prospect due to their excellent stability. However, there are few reports on their nonlinear optical properties. In this work, the nonlinear optical behavior of FAPbBr$_{3}$ NCs is studied. The methods of multiphoton absorption photoluminescence saturation and open aperture $Z$-scan technique were applied to determine the TPA cross-section of FAPbBr$_{3}$ NCs, which was around $2.76 \times 10^{-45}$ cm$^{4}\cdot$s$\cdot $photon$^{-1}$ at 800 nm. In addition, temperature-dependent photoluminescence induced by TPA was investigated, and the small longitudinal optical phonon energy and electron-phonon coupling strength was obtained, which confirm the weak Pb-Br interaction. Meanwhile, it is found that the exciton binding energy in FAPbBr$_{3}$ NCs was 69.668 meV, which may be ascribed to the strong hydrogen bond interaction. It is expected that our findings will promote the application of FAPbBr$_{3}$ NCs in optoelectronic devices.

关键词: FAPbBr3 nanocrystals, two-photon absorption cross-section, Z-scan, multiphoton absorption photoluminescence saturation

Abstract: Perovskite nanocrystals (NCs) with high two-photon absorption (TPA) cross-section are of great interest due to their potential applications in three-dimensional optical data storage and multiphoton fluorescence microscopy. Among various perovskite materials, FAPbBr$_{3}$ NCs show a better development prospect due to their excellent stability. However, there are few reports on their nonlinear optical properties. In this work, the nonlinear optical behavior of FAPbBr$_{3}$ NCs is studied. The methods of multiphoton absorption photoluminescence saturation and open aperture $Z$-scan technique were applied to determine the TPA cross-section of FAPbBr$_{3}$ NCs, which was around $2.76 \times 10^{-45}$ cm$^{4}\cdot$s$\cdot $photon$^{-1}$ at 800 nm. In addition, temperature-dependent photoluminescence induced by TPA was investigated, and the small longitudinal optical phonon energy and electron-phonon coupling strength was obtained, which confirm the weak Pb-Br interaction. Meanwhile, it is found that the exciton binding energy in FAPbBr$_{3}$ NCs was 69.668 meV, which may be ascribed to the strong hydrogen bond interaction. It is expected that our findings will promote the application of FAPbBr$_{3}$ NCs in optoelectronic devices.

Key words: FAPbBr3 nanocrystals, two-photon absorption cross-section, Z-scan, multiphoton absorption photoluminescence saturation

中图分类号:  (Nonlinear optics)

  • 42.65.-k
42.62.Fi (Laser spectroscopy) 42.70.Nq (Other nonlinear optical materials; photorefractive and semiconductor materials)