Enhanced Piezoelectricity of MAPbI3 by the Introduction of MXene and Its Utilization in Boosting High-Performance Photodetectors

Gaosi Han; Xiao-Fen Li; Andy Berbille; Yueming Zhang; Xiongxin Luo; Lindong Liu; Longyi Li; Zhong Lin Wang; Laipan Zhu

doi:10.1002/adma.202313288

Enhanced Piezoelectricity of MAPbI₃ by the Introduction of MXene and Its Utilization in Boosting High-Performance Photodetectors

Adv Mater. 2024 Mar 27:e2313288. doi: 10.1002/adma.202313288. Online ahead of print.

Authors

Gaosi Han^{1

2}, Xiao-Fen Li^{1

3}, Andy Berbille^{1

2}, Yueming Zhang^{1

2}, Xiongxin Luo^{1

2}, Lindong Liu¹, Longyi Li^{1

2}, Zhong Lin Wang^{1

2

4

5}, Laipan Zhu^{1

2}

Affiliations

¹ CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, P. R. China.
² School of Nanoscience and Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
³ Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China.
⁴ Yonsei Frontier Lab, Yonsei University, Seoul, 03722, Republic of Korea.
⁵ School of Material Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia, 30332, USA.

PMID: 38537247
DOI: 10.1002/adma.202313288

Abstract

Recently, perovskite photodetectors (PDs) are risen to prominence due to substantial research interest. Beyond merely tweaking the composition of materials, a cutting-edge advancement lies in leveraging the innate piezoelectric polarization properties of perovskites themselves. Here, the investigation shows utilizing Ti₃C₂T_x, a typical MXene, as an intermediate layer for significantly boosting the piezoelectric property of MAPbI₃ thin films. This improvement is primarily attributed to the enhanced polarization of the methylammonium (MA⁺) groups within MAPbI₃, induced by the OH groups present in Ti₃C₂T_x. A flexible PD based on the MAPbI₃/MXene heterostructure is then fabricated. The new device is sensitive to a wide range of wavelengths, displays greatly enhanced performance owing to the piezo-phototronic coupling. Moreover, the device is endowed with a greatly reduced response time, down to millisecond level, through the pyro-phototronic effect. The characterization shows applying a -1.2% compressive strain on the PD leads to a remarkable 102% increase in the common photocurrent, and a 76% increase in the pyro-phototronic current. The present work reveals how the emerging piezo-phototronic and pyro-phototronic effects can be employed to design high-performance flexible perovskite PDs.

Keywords: MAPbI3; MXene; photodetectors; piezoelectricity; piezo‐phototronic effect; pyro‐phototronic effect.

Abstract

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