磁场对(C4H9NH3)2(CH3NH3)Pb2I7钙钛矿发光特性调控的研究

doi:10.11949/0438-1157.20200078

化工学报 ›› 2020, Vol. 71 ›› Issue (6): 2912-2917.DOI: 10.11949/0438-1157.20200078

• 材料化学工程与纳米技术 • 上一篇

磁场对(C₄H₉NH₃)₂(CH₃NH₃)Pb₂I₇钙钛矿发光特性调控的研究

王雅倩^1,²(),鲁晓^1,²,彭波^1,²()

^1.电子科技大学电子科学与工程学院，四川成都 611731
^2.电子科技大学国家电磁辐射控制材料工程技术研究中心，四川成都 611731

收稿日期:2020-01-19 修回日期:2020-03-24 出版日期:2020-06-05 发布日期:2020-06-05
通讯作者: 彭波
作者简介:王雅倩（1993—），女，硕士，uestcwyq@163.com
基金资助:
国家自然科学基金青年基金项目(51602040)

Control of magnetic field to luminescence characteristics in (C₄H₉NH₃)₂(CH₃NH₃)Pb₂I₇ perovskite

Yaqian WANG^1,²(),Xiao LU^1,²,Bo PENG^1,²()

^1.School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, Sichuan, China
^2.National Engineering Research Center of Electromagnetic Radiation Control Materials, University of Electronic Science and Technology of China, Chengdu 611731, Sichuan, China

Received:2020-01-19 Revised:2020-03-24 Online:2020-06-05 Published:2020-06-05
Contact: Bo PENG

摘要/Abstract

摘要：

(C₄H₉NH₃)₂(CH₃NH₃)Pb₂I₇是一种Ruddlesden-Popper相钙钛矿材料，具有层状结构，层间通过van der Waals力结合，因此可以通过机械剥离的方法，获得其二维薄层。二维(C₄H₉NH₃)₂(CH₃NH₃)Pb₂I₇内束缚激子会自发复合从而表现出强的荧光，其圆极化率、峰位均受磁场调控。在外磁场中，荧光圆极化率与磁场呈线性关系，激子中电子和空穴之间的朗德因子差Δg约为0.43。束缚激子在磁场中受抗磁效应影响，致使其发光峰随磁场增加而红移。

关键词: 纳米材料, 纳米结构, 制备, 钙钛矿, 荧光, 磁场调控

Abstract:

(C₄H₉NH₃)₂(CH₃NH₃)Pb₂I₇ is a Ruddlesden-Popper phase perovskite material, has a layered structure, and the layers are combined by van der Waals forces. The two-dimensional layered perovskite can be obtained by mechanically exfoliated from bulk crystals, which display strong bound exciton spontaneous emission. The helicity parameter of the bound exciton is linear to the external magnetic field, giving rise to a giant Lande factor difference (Δg) of about 0.43 between the electron and hole of bound exciton. The antimagnetic effect leads to a redshift of bound exciton emission in magnetic field.

Key words: nanomaterials, nanostructure, preparation, perovskite, photoluminescence, magnetic field regulation

中图分类号:

王雅倩, 鲁晓, 彭波. 磁场对(C₄H₉NH₃)₂(CH₃NH₃)Pb₂I₇钙钛矿发光特性调控的研究[J]. 化工学报, 2020, 71(6): 2912-2917.

Yaqian WANG, Xiao LU, Bo PENG. Control of magnetic field to luminescence characteristics in (C₄H₉NH₃)₂(CH₃NH₃)Pb₂I₇ perovskite[J]. CIESC Journal, 2020, 71(6): 2912-2917.

图/表 3

图1 杂化钙钛矿(C4H9NH3)2(CH3NH3)Pb2I7晶体结构和光学显微图

Fig.1 Crystal structure and optical micrograph image of hybrid perovskite (C4H9NH3)2(CH3NH3)Pb2I7

图2 10 K时磁场对圆极化率的影响

Fig.2 Helicity parameter as a function of magnetic field at 10 K

图3 磁场对钙钛矿束缚激子发光峰位的影响

Fig.3 Bound exciton emission peak of perovskite as a function of magnetic field at 10 K

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磁场对(C₄H₉NH₃)₂(CH₃NH₃)Pb₂I₇钙钛矿发光特性调控的研究

Control of magnetic field to luminescence characteristics in (C₄H₉NH₃)₂(CH₃NH₃)Pb₂I₇ perovskite

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