Fabrication of mixed perovskite organic cation thin films via controllable cation exchange

doi:10.1088/1674-1056/27/2/024208

中国物理B ›› 2018, Vol. 27 ›› Issue (2): 24208-024208.doi: 10.1088/1674-1056/27/2/024208

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Fabrication of mixed perovskite organic cation thin films via controllable cation exchange

Yu-Long Zhao(赵宇龙), Jin-Feng Wang(王进峰), Ben-Guang Zhao(赵本广), Chen-Chen Jia(贾晨晨), Jun-Peng Mou(牟俊朋), Lei Zhu(朱磊), Jian Song(宋健), Xiu-Quan Gu(顾修全), Ying-Huai Qiang(强颖怀)

School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, China

收稿日期:2017-07-08 修回日期:2017-11-03 出版日期:2018-02-05 发布日期:2018-02-05
通讯作者: Ying-Huai Qiang E-mail:yhqiang@cumt.edu.cn
基金资助:
Project supported by the Fundamental Research Funds for the Central Universities, China (Grant No. 2015QNA09).

Fabrication of mixed perovskite organic cation thin films via controllable cation exchange

School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, China

Received:2017-07-08 Revised:2017-11-03 Online:2018-02-05 Published:2018-02-05
Contact: Ying-Huai Qiang E-mail:yhqiang@cumt.edu.cn
About author:42.82.Gw; 42.88.+h; 42.90.+m
Supported by:
Project supported by the Fundamental Research Funds for the Central Universities, China (Grant No. 2015QNA09).

摘要/Abstract

摘要： Here in this paper, we demonstrate a facile technique for creating the mixed formamidinium (HN=CHNH₃⁺, FA⁺) and methylammonium (CH₃NH₃⁺, MA⁺) cations in the lead iodide perovskite. This technique entails a facile drop-casting of formamidinium iodide (FAI) solutions on as-prepared MAPbI₃ perovskite thin films under the controlled conditions, which leads to controllable displacement of the MA⁺ cations by FA⁺ cations in the perovskite structure at room temperature. Uniform and controllable mixed organic cation perovskite thin films without a “bi-layered” or graded structure are achieved. By applying this approach to photovoltaic devices, we are able to improve the performances of devices through extending their optical-absorption onset further into the infrared region to enhance solar-light harvesting. Additionally, this work provides a simple and efficient technique to tune the structural, electrical, and optoelectronic properties of the light-harvesting materials for high-performance perovskite solar cells.

关键词: organic-inorganic perovskitesolar cell, morphology, cation exchange, drop-casting

Abstract: Here in this paper, we demonstrate a facile technique for creating the mixed formamidinium (HN=CHNH₃⁺, FA⁺) and methylammonium (CH₃NH₃⁺, MA⁺) cations in the lead iodide perovskite. This technique entails a facile drop-casting of formamidinium iodide (FAI) solutions on as-prepared MAPbI₃ perovskite thin films under the controlled conditions, which leads to controllable displacement of the MA⁺ cations by FA⁺ cations in the perovskite structure at room temperature. Uniform and controllable mixed organic cation perovskite thin films without a “bi-layered” or graded structure are achieved. By applying this approach to photovoltaic devices, we are able to improve the performances of devices through extending their optical-absorption onset further into the infrared region to enhance solar-light harvesting. Additionally, this work provides a simple and efficient technique to tune the structural, electrical, and optoelectronic properties of the light-harvesting materials for high-performance perovskite solar cells.

Key words: organic-inorganic perovskitesolar cell, morphology, cation exchange, drop-casting

中图分类号: (Other integrated-optical elements and systems)

42.82.Gw

42.88.+h (Environmental and radiation effects on optical elements, devices, and systems) 42.90.+m (Other topics in optics)

赵宇龙, 王进峰, 赵本广, 贾晨晨, 牟俊朋, 朱磊, 宋健, 顾修全, 强颖怀. Fabrication of mixed perovskite organic cation thin films via controllable cation exchange[J]. 中国物理B, 2018, 27(2): 24208-024208.

Yu-Long Zhao(赵宇龙), Jin-Feng Wang(王进峰), Ben-Guang Zhao(赵本广), Chen-Chen Jia(贾晨晨), Jun-Peng Mou(牟俊朋), Lei Zhu(朱磊), Jian Song(宋健), Xiu-Quan Gu(顾修全), Ying-Huai Qiang(强颖怀). Fabrication of mixed perovskite organic cation thin films via controllable cation exchange[J]. Chin. Phys. B, 2018, 27(2): 24208-024208.

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Fabrication of mixed perovskite organic cation thin films via controllable cation exchange

Fabrication of mixed perovskite organic cation thin films via controllable cation exchange

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