（PEA）2PbI4/MoS2异质结构中与能量转移和空穴转移相关的超快载流子动力学

IF 3.6 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence Pub Date : 2026-05-01 Epub Date: 2026-02-11 DOI:10.1016/j.jlumin.2026.121798

Meng Xue , Shuwen Zheng , Zhongpo Zhou , Jian Song , Zhaoyong Jiao , Shuhong Ma , Guangrui Jia , Chaochao Qin

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引用次数: 0

摘要

基于二维（2D）过渡金属二硫族化物（TMDs）和钙钛矿的范德华异质结构的出现，为近年来高性能光电探测器、发光二极管和其他光电器件的研究提供了良好的基础。本文主要研究了二维钙钛矿（PEA）2PbI4与单层MoS2形成的异质结构。利用飞秒瞬态吸收光谱分析了不同激发波长下异质结构的界面转移行为。研究结果表明，（PEA）2PbI4/MoS2异质结构中存在空穴转移和能量转移。空穴转移速率常数为2 × 1011s−1。然而，由于（PEA）2PbI4有机间隔层的带隙较大，阻碍了电子的直接传递过程。这一发现为深入探索其在光电器件领域的潜在应用提供了参考。

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Ultrafast carrier dynamics related to energy transfer and hole transfer in (PEA)2PbI4/MoS2 heterostructure

The emergence of van der Waals heterostructures based on two-dimensional (2D) transition metal dichalcogenides (TMDs) and perovskites has provided a good basis for the study of high-performance photodetectors, light-emitting diodes, and other optoelectronic devices in recent years. This study focuses on the heterostructure formed by two-dimensional perovskite (PEA)₂PbI₄ and monolayer MoS₂. The interface transfer behavior of the heterostructure was obtained using femtosecond transient absorption spectra at different excitation wavelengths. The research results show that there are both hole transfer and energy transfer within the (PEA)₂PbI₄/MoS₂ heterostructure. The hole transfer rate constant is 2 × 10¹¹ s⁻¹. However, due to the large band gap of the organic spacer layer of (PEA)₂PbI₄, the direct electron transfer process is blocked. This discovery provides a reference for in-depth exploration of the potential applications in the field of optoelectronic devices.

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来源期刊

Journal of Luminescence 物理-光学

CiteScore

6.70

自引率

13.90%

发文量

850

审稿时长

3.8 months

期刊介绍： The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid. We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.