Photonics Research, Volume. 10, Issue 3, 628(2022)

Surface ligand modified cesium lead bromide/silica sphere composites for low-threshold upconversion lasing

Qian Xiong1,2,3,4, Sihao Huang1, Zijun Zhan2, Juan Du1,2,5,7、*, Xiaosheng Tang6,8、*, Zhiping Hu2, Zhengzheng Liu1, Zeyu Zhang2, Weiwei Chen6, and Yuxin Leng1,2,3,9、*
Author Affiliations
  • 1State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China
  • 2Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
  • 3School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
  • 4Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • 5School of Physics and Electronics, Shandong Normal University, Jinan 250014, China
  • 6College of Optoelectronic Engineering, Chongqing University of Post and Telecommunications, Chongqing 400065, China
  • 7e-mail: dujuan@mail.siom.ac.cn
  • 8e-mail: xstang@cqupt.edu.cn
  • 9e-mail: lengyuxin@mail.siom.ac.cn
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    Figures & Tables(7)
    (a) Passivation and ligand modification procedure on the surface of the CsPbBr3 QDs. (b) XRD patterns and (c) FTIR spectra for CsPbBr3 QDs with different ligands. HRTEM images for (d) CsPbBr3-OAm and (e) CsPbBr3-OLA QDs.
    (a) XPS profiles for CsPbBr3-OAm and CsPbBr3-OLA QDs, (b) Cs-3d spectrum, (c) Pb-4f spectrum, and (d) Br-3d spectrum.
    (a) PL spectrum, (b) absorption spectrum, and (c) time-resolved PL decay of CsPbBr3-OAm and CsPbBr3-OLA QDs. PL stability measurement for (d) CsPbBr3-OAm and (e) CsPbBr3-OLA QDs under heating conditions. (f) PL intensity variation of QDs films over 10 h under heating conditions. (g) Photographs under daylight and 365 nm UV light of CsPbBr3-OAm and CsPbBr3-OLA QDs for 100 days in hexane. (h) PLQY variation of QDs solution in air over 100 days.
    (a) TEM image, (b) HRTEM image, and (c) element mapping of CsPbBr3-OAm/SiO2 composite. (d) TEM image, (e) HRTEM image, and (f) element mapping of CsPbBr3-OLA/SiO2 composite.
    Random lasing from the composite film under two-photon excitation. (a) Schematic of random lasing from CsPbBr3/SiO2 composite film upon 800 nm excitation above lasing threshold. (b) Power-dependent emission spectra from CsPbBr3-OAm/SiO2 composite film. (c) Integrated lasing intensity of CsPbBr3-OAm/SiO2 composite film as a function of power fluence showing the lasing threshold at 257.34 μJ/cm2. (d) Power-dependent emission spectra from CsPbBr3-OLA/SiO2 composite film. (e) Integrated lasing intensity of CsPbBr3-OLA/SiO2 composite film as a function of power fluence showing the lasing threshold at 79.81 μJ/cm2.
    Gaussian fitting of a selected lasing peak corresponding to the Q-value from (a) CsPbBr3-OAm/SiO2 and (b) CsPbBr3-OLA/SiO2.
    • Table 1. Time-Resolved PL Decays for CsPbBr3-OLA QDs and CsPbBr3-OAm QDs

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      Table 1. Time-Resolved PL Decays for CsPbBr3-OLA QDs and CsPbBr3-OAm QDs

       τ1 (ns)A1 (%)τ2 (ns)A2 (%)τa (ns)
      OLA-QDs3.4157.914.644.89.5
      OAm-QDs5.8113.721.280.116.9
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    Qian Xiong, Sihao Huang, Zijun Zhan, Juan Du, Xiaosheng Tang, Zhiping Hu, Zhengzheng Liu, Zeyu Zhang, Weiwei Chen, Yuxin Leng. Surface ligand modified cesium lead bromide/silica sphere composites for low-threshold upconversion lasing[J]. Photonics Research, 2022, 10(3): 628

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    Paper Information

    Category: Optical and Photonic Materials

    Received: Sep. 14, 2021

    Accepted: Dec. 29, 2021

    Published Online: Feb. 9, 2022

    The Author Email: Juan Du (dujuan@mail.siom.ac.cn), Xiaosheng Tang (xstang@cqupt.edu.cn), Yuxin Leng (lengyuxin@mail.siom.ac.cn)

    DOI:10.1364/PRJ.442659

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