Diversity of band gap and photoluminescence properties of lead halide perovskite: A halogen-dependent spectroscopic study

Wenlei Yu; Yunfeng Jiang; Xiuwei Zhu; Chunhua Luo; Kai Jiang; Liangliang Chen; Juan Zhang

doi:10.1016/j.cplett.2018.03.052

Diversity of band gap and photoluminescence properties of lead halide perovskite: A halogen-dependent spectroscopic study

Wenlei Yu^*
, Yunfeng Jiang
, Xiuwei Zhu
, Chunhua Luo
, Kai Jiang
, Liangliang Chen
, Juan Zhang

^*Corresponding author for this work

School of Physics and Electronic Science

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

The effects of halogen substitution on microstructure, optical absorption, and phonon modes for perovskite CH₃NH₃PbX₃(MAPbX₃, X = I/Br/Cl) films grown on FTO substrates have been investigated. The X-ray diffraction analysis exhibited good crystallization, and the strong diffraction peak assigned to (100)_c for X = Br/Cl shifted toward a higher angle compared to (110)_t of MAPbI₃. Band-gap tuning from 1.63 to 2.37 to 3.11 eV in the I-Br-Cl series can be found due to the halogen effects. These energy values closely match the positions of peak determined from photoluminescence experiments. The remarkable absorption dip and emission peak appear for the MAPbBr₃, suggesting higher crystallinity under the same preparation conditions. The wavenumbers of main IR-vibrations slightly decrease with ionic radius of the halogen increasing (in the order of Cl-Br-I), which related to the increasing polarizability. These results provide important progress towards the understanding of the halide role in the realization of high performance MAPbX₃-based solar cells.

Original language	English
Pages (from-to)	93-98
Number of pages	6
Journal	Chemical Physics Letters
Volume	699
DOIs	https://doi.org/10.1016/j.cplett.2018.03.052
State	Published - May 2018

Keywords

Halogen effect
IR-vibrations
Optical transition
Perovskite films

Access to Document

10.1016/j.cplett.2018.03.052

Cite this

@article{4fd15c24df9546e5ae22174a52c25bfb,

title = "Diversity of band gap and photoluminescence properties of lead halide perovskite: A halogen-dependent spectroscopic study",

abstract = "The effects of halogen substitution on microstructure, optical absorption, and phonon modes for perovskite CH3NH3PbX3(MAPbX3, X = I/Br/Cl) films grown on FTO substrates have been investigated. The X-ray diffraction analysis exhibited good crystallization, and the strong diffraction peak assigned to (100)c for X = Br/Cl shifted toward a higher angle compared to (110)t of MAPbI3. Band-gap tuning from 1.63 to 2.37 to 3.11 eV in the I-Br-Cl series can be found due to the halogen effects. These energy values closely match the positions of peak determined from photoluminescence experiments. The remarkable absorption dip and emission peak appear for the MAPbBr3, suggesting higher crystallinity under the same preparation conditions. The wavenumbers of main IR-vibrations slightly decrease with ionic radius of the halogen increasing (in the order of Cl-Br-I), which related to the increasing polarizability. These results provide important progress towards the understanding of the halide role in the realization of high performance MAPbX3-based solar cells.",

keywords = "Halogen effect, IR-vibrations, Optical transition, Perovskite films",

author = "Wenlei Yu and Yunfeng Jiang and Xiuwei Zhu and Chunhua Luo and Kai Jiang and Liangliang Chen and Juan Zhang",

note = "Publisher Copyright: {\textcopyright} 2018",

year = "2018",

month = may,

doi = "10.1016/j.cplett.2018.03.052",

language = "英语",

volume = "699",

pages = "93--98",

journal = "Chemical Physics Letters",

issn = "0009-2614",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Diversity of band gap and photoluminescence properties of lead halide perovskite

T2 - A halogen-dependent spectroscopic study

AU - Yu, Wenlei

AU - Jiang, Yunfeng

AU - Zhu, Xiuwei

AU - Luo, Chunhua

AU - Jiang, Kai

AU - Chen, Liangliang

AU - Zhang, Juan

PY - 2018/5

Y1 - 2018/5

N2 - The effects of halogen substitution on microstructure, optical absorption, and phonon modes for perovskite CH3NH3PbX3(MAPbX3, X = I/Br/Cl) films grown on FTO substrates have been investigated. The X-ray diffraction analysis exhibited good crystallization, and the strong diffraction peak assigned to (100)c for X = Br/Cl shifted toward a higher angle compared to (110)t of MAPbI3. Band-gap tuning from 1.63 to 2.37 to 3.11 eV in the I-Br-Cl series can be found due to the halogen effects. These energy values closely match the positions of peak determined from photoluminescence experiments. The remarkable absorption dip and emission peak appear for the MAPbBr3, suggesting higher crystallinity under the same preparation conditions. The wavenumbers of main IR-vibrations slightly decrease with ionic radius of the halogen increasing (in the order of Cl-Br-I), which related to the increasing polarizability. These results provide important progress towards the understanding of the halide role in the realization of high performance MAPbX3-based solar cells.

AB - The effects of halogen substitution on microstructure, optical absorption, and phonon modes for perovskite CH3NH3PbX3(MAPbX3, X = I/Br/Cl) films grown on FTO substrates have been investigated. The X-ray diffraction analysis exhibited good crystallization, and the strong diffraction peak assigned to (100)c for X = Br/Cl shifted toward a higher angle compared to (110)t of MAPbI3. Band-gap tuning from 1.63 to 2.37 to 3.11 eV in the I-Br-Cl series can be found due to the halogen effects. These energy values closely match the positions of peak determined from photoluminescence experiments. The remarkable absorption dip and emission peak appear for the MAPbBr3, suggesting higher crystallinity under the same preparation conditions. The wavenumbers of main IR-vibrations slightly decrease with ionic radius of the halogen increasing (in the order of Cl-Br-I), which related to the increasing polarizability. These results provide important progress towards the understanding of the halide role in the realization of high performance MAPbX3-based solar cells.

KW - Halogen effect

KW - IR-vibrations

KW - Optical transition

KW - Perovskite films

UR - https://www.scopus.com/pages/publications/85044464667

U2 - 10.1016/j.cplett.2018.03.052

DO - 10.1016/j.cplett.2018.03.052

M3 - 文章

AN - SCOPUS:85044464667

SN - 0009-2614

VL - 699

SP - 93

EP - 98

JO - Chemical Physics Letters

JF - Chemical Physics Letters

ER -

Diversity of band gap and photoluminescence properties of lead halide perovskite: A halogen-dependent spectroscopic study

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this