CsPbBr<sub>3</sub>纳米晶电子辐照效应研究

张博文; 韩丹; 薛梦芸; 曹荣幸; 李红霞; 曾祥华; 薛玉雄

doi:10.37188/CO.2023-0044

CsPbBr₃纳米晶电子辐照效应研究

doi: 10.37188/CO.2023-0044

张博文 ^1,,
韩丹 ^1,,,
薛梦芸 ²,
曹荣幸 ¹,
李红霞 ¹,
曾祥华 ¹,
薛玉雄 ^1,,

1.
扬州大学电气与能源动力工程学院, 江苏扬州 225000
2.
扬州大学物理与科学技术学院, 江苏扬州 225002

基金项目:国家自然科学基金（No. 12004329）；强脉冲辐射环境模拟与效应国家重点实验室专项经费（No. SKLIPR2115）；空间环境材料行为及评价技术国家级重点实验室基金（No. WDZC-HGD-2022-11）

详细信息

作者简介:
张博文（1999—），男，江苏盐城人，扬州大学硕士研究生，主要从事材料辐射效应研究，结构光学表征模拟研究。E-mail：[email protected]

韩　丹（1993—），男，吉林长春人，2021年于山东大学获得博士学位，现为扬州大学电气与能源动力工程学院讲师，主要从事微纳尺度热传导研究、二维材料载流子输运机制分析、二维材料机械性质分析，材料辐射屏蔽效应等方面的研究工作。E-mail：[email protected]

薛玉雄（1975—），男，陕西佳县人，现为扬州大学电气与能源动力工程学院教授，校特聘教授。主要从事空间辐射效应及空间环境探测技术研究。E-mail：[email protected]

中图分类号:O76;O43
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- 网络出版日期: 2023-07-11

Effect of electron irradiation on CsPbBr₃ perovskite nanocrystal

ZHANG Bo-wen ^{1
,},
HAN Dan ^{1
,,},
XUE Mengyun ²,
CAO Rongxing ¹,
LI Hongxia ¹,
ZENG Xianghua ¹,
XUE Yu-xiong ^{1
,

,}

1.
College of Electrical, Energy and Power Engineering, Yangzhou University, Yangzhou 225000, China
2.
College of Electrical, Energy and Power Engineering, Yangzhou University, Yangzhou 225000, China

Funds:Supported by National Natural Science Foundation of China (No.12004329); Open Project of State Key Laboratory of Intense Pulsed Radiation Simulation and Effect (No. SKLIPR2115); Foundation of National Key Laboratory of Materials Behavior and Evaluation Technology in Space Environment (No. WDZC-HGD-2022-11).

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Corresponding author: [email protected]; [email protected]

摘要

摘要:
钙钛矿材料具有优异的光学性能和较高的载流子迁移率，成为空间太阳能电池领域极具竞争力的材料。然而空间粒子辐照容易改变材料结构和光学性能，导致其性能下降。为了探究电子辐照对CsPbBr₃材料结构与光学特性的影响规律，本文开展了CsPbBr₃材料电子辐照实验，利用高分辨透射电子显微镜方法表征CsPbBr₃纳米晶微观形貌，并通过X射线衍射分析和X射线光电子能谱分析进一步探究晶体结构的变化趋势。研究发现电子辐照后CsPbBr₃纳米晶形貌变得粗糙，尺寸明显减小，并且纳米晶在高剂量电子辐照下变得紧凑，形成纳米团簇。其次通过稳态紫外-可见吸收光谱图与光致发光谱图表征CsPbBr₃材料光学性能，并利用第一性原理计算分析辐照后晶格膨胀带来的带隙变化。研究证明电子辐照后纳米晶颜色加深，影响钙钛矿透光率，进而增强了样品对光的吸收性能，同时电子辐照能够分解CsPbBr₃纳米晶，特别是高剂量辐照后其光致发光性能显著降低53.7%～78.6%。研究结果为钙钛矿纳米晶空间辐射损伤机理及应用研究提供数据支撑。
- CsPbBr₃钙钛矿 /
- 电子辐照 /
- 晶体结构 /
- 光学性能
Abstract:
With excellent optical properties and high carrier mobility, perovskite materials have become highly competitive materials in the field of space solar cells. However, space particle irradiation can change the structure and optical properties of materials, leading to a rapid degradation of device performance. In order to investigate the influence of electron irradiation on the structure and optical properties of CsPbBr₃ nanocrystals, this paper conducted electron irradiation experiments on CsPbBr₃ materials, characterized the microscopic morphology of CsPbBr₃ nanocrystals by high-resolution transmission electron microscopy method. Moreover, this paper investigated the change trend of crystal structure by X-ray diffraction analysis and X-ray photoelectron spectroscopy analysis. The results revealed electron irradiation caused the CsPbBr3 nanocrystals to become rough and significantly reduced in size. The nanocrystal became compact and formed nanocluster under high-dose electron irradiation. Furthermore, the optical properties of CsPbBr₃ materials were characterized using steady-state UV-Vis absorption spectra and photoluminescence spectra. The analysis of lattice expansion-induced bandgap changes after irradiation was performed using first principles calculations. It is demonstrated that electron irradiation deepened the color of nanocrystals and affected the light transmittance of CsPbBr₃ nanocrystalline, thereby enhancing the optical absorption performance of the samples. However, electron irradiation also led to the decomposition of CsPbBr3 nanocrystals, resulting in a significant reduction in luminescence intensity by 53.7%−78.6% after high-dose irradiation. These findings provide valuable data support for the study of spatial radiation damage mechanisms and the application of perovskite nanocrystals.
- CsPbBr₃ perovskite /
- electron radiation /
- crystal structure /
- optical properties

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图 1 CsPbBr₃材料高分辨透射电子显微镜图像

Figure 1. High-resolution transmission electron microscopy image of the CsPbBr₃ material

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图 2 (a) CsPbBr₃材料的TEM图像；（b）能量为2 MeV的电子的入射情况

Figure 2. (a) The TEM image of the CsPbBr₃ material; (b) The penetration of electrons with 2 MeV in the sample

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图 3 (a) PNC-0；(b) PNC-5；(c) PNC-25；(d) PNC-50样品图

Figure 3. Sample diagrams of (a) PNC-0, (b) PNC-5, (c) PNC-25, and (d) PNC-50

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图 4 PNC-0, PNC-5, PNC-25, PNC-50的（a-d）TEM图像和（e-h）HRTEM图像

Figure 4. (a-d) The TEM images and (e-h) HRTEM images of PNC-0, PNC-5, PNC-25, and PNC-50

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图 5 PNC-0，PNC-5，PNC-25，PNC-50的 (a) XRD图；(b) Br 3d轨道的XPS图谱；(c) Pb 4f轨道的XPS图谱；(d) Si 2p轨道的XPS图谱

Figure 5. (a) The XRD patterns of PNC-0, PNC-5, PNC-25, and PNC-50; (b-d) The XPS patterns of Br 3d, Pb 4f, and Si 2p orbits

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图 6 PNC-0，PNC-5，PNC-25，PNC-50的（a）吸收光谱和（b）带隙分布

Figure 6. (a) The optical absorption spectrums and (b) the band gaps of PNC-0, PNC-5, PNC-25, and PNC-50

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图 7 PNC-0，PNC-5，PNC-25，PNC-50光致发光光谱

Figure 7. Photoluminescence spectra of PNC-0, PNC-5, PNC-25, and PNC-50

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图 8 CsPbBr₃材料带隙随应变的变化

Figure 8. The band gap of CsPbBr₃ material changes with strain

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图 9 (a-c) PNC-5，PNC-25，PNC-50高温退火后样品图

Figure 9. The sample diagrams of annealed (a) PNC-5, (b) PNC-25, and (c) PNC-50

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图 10 退火过后PNC-0，PNC-5，PNC-25，PNC-50的光致发光光谱

Figure 10. Photoluminescence spectra of PNC-0, PNC-5, PNC-25, and PNC-50 after annealing

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