Understanding Excitonic Behavior in Light Absorption and Recombination Process

被引：30

作者：

Guo, Bolin ^{[1
,2
]}

Luo, Chao ^{[1
]}

Yan, Cheng ^{[1
]}

Sun, Bai ^{[2
]}

Li, Wen ^{[1
]}

Yang, Weiqing ^{[1
]}

机构：

[1] Southwest Jiaotong Univ, Sch Mat Sci & Engn, Key Lab Adv Technol Mat, State Key Lab Tract Power,Minist Educ, Chengdu 610031, Peoples R China

[2] Southwest Jiaotong Univ, Sch Phys Sci & Technol, Key Lab Adv Technol Mat, Minist Educ China, Chengdu 610031, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2020年 / 124卷 / 47期

关键词：

SELF-TRAPPED EXCITONS; EFFICIENT BLUE; PEROVSKITE; EMISSION; PHOTOLUMINESCENCE;

D O I：

10.1021/acs.jpcc.0c09334

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Understanding excitonic behavior in light absorption and recombination process is urgently needed to regulate luminescent properties of two-dimensional (2D) perovskite; however, such information is still unexplored. Here, first, we demonstrate that pure phenethylamine lead bromine (PEA(2)PbBr(4)) nanosheets (NSs) possess strong exciton absorption and emission spectrum with high exciton binding energy (up to 310 meV) and prove that free excitons (FEs) play a decisive role in the optical transition process. Then, we design Cd-doped PEA(2)PbBr(4) NSs to induce self-trapped excitons (STEs). Doping with isoelectric Cd naturally induces an impurity-driven lattice distortion and a strong exciton-phonon coupling, resulting in the STEs broadband extrinsic luminescence spectra. Further, the corresponding exciton fluorescent components of FEs and STEs can be effectively distinguished from the emission spectrum through spectral line-shape analysis, revealing the synergistic effect of exciton states in the recombination process. Unambiguously, this work will provide a deeper understanding of the exciton behavior and look forward to regulating exciton composition to obtain ideal luminescence properties.

引用

页码：26076 / 26082

页数：7

共 39 条

[1] Scaling law for excitons in 2D perovskite quantum wells [J].

Blancon, J. -C. ;

Stier, A. V. ;

Tsai, H. ;

Nie, W. ;

Stoumpos, C. C. ;

Traore, B. ;

Pedesseau, L. ;

Kepenekian, M. ;

Katsutani, F. ;

Noe, G. T. ;

Kono, J. ;

Tretiak, S. ;

Crooker, S. A. ;

Katan, C. ;

Kanatzidis, M. G. ;

Crochet, J. J. ;

Even, J. ;

Mohite, A. D. .

NATURE COMMUNICATIONS, 2018, 9

[2] Two-dimensional Ruddlesden-Popper perovskite nanosheets: Synthesis, optoelectronic properties and miniaturized optoelectronic devices [J].

Chen, Junnian ;

Shi, Yamin ;

He, Yunbin ;

Zhai, Tianyou .

FLATCHEM, 2019, 17

[3] Excitonic Effects in Methylammonium Lead Halide Perovskites [J].

Chen, Xihan ;

Lu, Haipeng ;

Yang, Ye ;

Beard, Matthew C. .

JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 2018, 9 (10) :2595-2603

[4]

Grim JQ, 2014, NAT NANOTECHNOL, V9, P891, DOI [10.1038/nnano.2014.213, 10.1038/NNANO.2014.213]

[5] Exciton localization in solution-processed organolead trihalide perovskites [J].

He, Haiping ;

Yu, Qianqian ;

Li, Hui ;

Li, Jing ;

Si, Junjie ;

Jin, Yizheng ;

Wang, Nana ;

Wang, Jianpu ;

He, Jingwen ;

Wang, Xinke ;

Zhang, Yan ;

Ye, Zhizhen .

NATURE COMMUNICATIONS, 2016, 7

[6] DIELECTRIC CONFINEMENT EFFECT ON EXCITONS IN PBI4-BASED LAYERED SEMICONDUCTORS [J].

HONG, X ;

ISHIHARA, T ;

NURMIKKO, AV .

PHYSICAL REVIEW B, 1992, 45 (12) :6961-6964

[7] Efficient Blue and White Perovskite Light-Emitting Diodes via Manganese Doping [J].

Hou, Shaocong ;

Gangishetty, Mahesh K. ;

Quan, Qimin ;

Congreve, Daniel N. .

JOULE, 2018, 2 (11) :2421-2433

[8] Excitonic states and structural stability in two-dimensional hybrid organic-inorganic perovskites [J].

Lekina, Yulia ;

Shen, Ze Xiang .

JOURNAL OF SCIENCE-ADVANCED MATERIALS AND DEVICES, 2019, 4 (02) :189-200

[9] All-Inorganic Bismuth-Based Perovskite Quantum Dots with Bright Blue Photoluminescence and Excellent Stability [J].

Leng, Meiying ;

Yang, Ying ;

Zeng, Kai ;

Chen, Zhengwu ;

Tan, Zhifang ;

Li, Shunran ;

Li, Jinghui ;

Xu, Bing ;

Li, Dengbing ;

Hautzinger, Matthew P. ;

Fu, Yongping ;

Zhai, Tianyou ;

Xu, Ling ;

Niu, Guangda ;

Jin, Song ;

Tang, Jiang .

ADVANCED FUNCTIONAL MATERIALS, 2018, 28 (01)

[10] Highly Efficient Perovskite Nanocrystal Light-Emitting Diodes Enabled by a Universal Crosslinking Method [J].

Li, Guangru ;

Rivarola, Florencia Wisnivesky Rocca ;

Davis, Nathaniel J. L. K. ;

Bai, Sai ;

Jellicoe, Tom C. ;

de la Pena, Francisco ;

Hou, Shaocong ;

Ducati, Caterina ;

Gao, Feng ;

Friend, Richard H. ;

Greenham, Neil C. ;

Tan, Zhi-Kuang .

ADVANCED MATERIALS, 2016, 28 (18) :3528-+

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