Stable two-dimensional lead iodide hybrid materials for light detection and broadband photoluminescence

Mohamed Saber Lassoued; Yuan-Chao Pang; Qian-Wen Li; Xinkai Ding; Bo Jiao; Hua Dong; Guijiang Zhou; Shujiang Ding; Zhicheng Zhang; Zhaoxin Wu; Gaoyang Gou; Zongyou Yin; Ju Li; Yan-Zhen Zheng

doi:10.1039/D1QM01247A

Stable two-dimensional lead iodide hybrid materials for light detection and broadband photoluminescence†

Mohamed Saber Lassoued,^ab Yuan-Chao Pang,^ab Qian-Wen Li,^ab Xinkai Ding,^b Bo Jiao,^cd Hua Dong,

^cd Guijiang Zhou,

^a Shujiang Ding,

^a Zhicheng Zhang,

^a Zhaoxin Wu,

^cd Gaoyang Gou,*^b Zongyou Yin,

^e Ju Li

^e and Yan-Zhen Zheng

*^ab

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* Corresponding authors

^a School of Chemistry, Xi’an Key Laboratory of Sustainable Energy and Materials Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi’an Jiaotong University, Xi’an 710049, China
E-mail: zheng.yanzhen@xjtu.edu.cn

^b Frontier Institute of Science and Technology (FIST), State Key Laboratory for Mechanical Behavior of Materials, and School of Physics, Xi’an Jiaotong University, Xi’an 710054, China
E-mail: gougaoyang@xjtu.edu.cn

^c Key Laboratory of Photonics Technology for Information, Key Laboratory for Physical Electronics and Devices of the Ministry of Education, Department of Electronic Science and Technology, School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi’an 710049, China

^d Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China

^e Department of Nuclear Science and Engineering, Department of Materials Science and Engineering, Massachu-setts Institute of Technology, Cambridge, MA 02139, USA

Abstract

Two-dimensional (2D) organic–inorganic hybrid materials have attracted widespread attention for photodetection. Moreover, such materials with broadband photoluminescence and strong photocurrent response are still rare. Here, we report two new semiconducting 2D organic–inorganic hybrid materials, namely {Pb^II₂I₆[Pb^II(TETA)]}_n (1Pb) and {Pb^II₃I₈[Pb^II(TETA)]}_n (2Pb), where TETA = triethylenetetramine, with broadband yellow-green emission. Both compounds are soluble in DMF and yield high surface coverage films through spin coating. Strikingly, the photocurrent responses of such thin films show ca. 600 and 700 nA cm⁻² difference between I_light and I_dark for 1Pb and 2Pb, respectively. To the best of our knowledge, 1Pb and 2Pb showed among the highest current obtained in 2D lead iodide hybrid materials under a low voltage (0.7 V). Moreover, 1Pb and 2Pb are stable under heat, moisture and light, which may provide realistic applications for light detection.

Materials Chemistry Frontiers

Stable two-dimensional lead iodide hybrid materials for light detection and broadband photoluminescence†

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Stable two-dimensional lead iodide hybrid materials for light detection and broadband photoluminescence

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