Charge Transfer in 2D Halide Perovskites and 2D/3D Heterostructures

Lin, Chenjian; Tang, Yuanhao; Xu, Wenzhan; Kumar, Prashant; Dou, Letian

doi:10.1021/acsenergylett.4c01530

ACS Energy Lett.

2024

DOI: 10.1021/acsenergylett.4c01530

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Charge Transfer in 2D Halide Perovskites and 2D/3D Heterostructures

Chenjian Lin,

Yuanhao Tang,

Wenzhan Xu

et al.

Abstract: BiographiesChenjian Lin completed his Ph.D. in Chemistry in the Prof. Michael Wasielewski's Lab at Northwestern University. He is currently a postdoctoral fellow in the Dou's Lab at Purdue University, working on design and synthesis of organic ligands for 2D perovskites and solar cells.Yuanhao Tang is a Ph.D. student in the Dou's Lab at Purdue University, working on fabricating efficient and stable perovskite solar cells.

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Cited by 4 publications

References 83 publications

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Manipulating Interlayer Carrier Relaxation Dynamics in Type‐II Heterostructures of 2D Hybrid Perovskites Through Organic Spacer Engineering

Han,

Qiu,

Tang

et al. 2024

Adv Funct Materials

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Type‐II heterostructures are crucial components in optoelectronic devices such as photovoltaics and photodetectors. Previous studies have shown that interlayer charge transfer (CT) is the dominant carrier relaxation mechanism in type‐II heterostructures of 2D materials. In this study, it is demonstrated that in type‐II heterostructures composed of 2D organic–inorganic hybrid perovskites (OIHPs), the conventional CT process can transition to an energy transfer (ET) process without requiring an additional charge‐blocking interlayer. The results indicate that CT predominates in heterostructures in which both layers have the same organic spacer, particularly in BA2PbI4/BA2MA2Pb3I10. Notably, when the organic spacer BA is replaced with PEA in one layer of the heterostructure, that is BA2PbI4/PEA2MA2Pb3I10, the carrier relaxation process shifts from CT to ET. Although both BA2PbI4/BA2MA2Pb3I10 and BA2PbI4/PEA2MA2Pb3I10 exhibit type‐II band alignment, density functional theory calculations reveal that the substitution of BA with PEA creates a novel type‐II band alignment. This new alignment inhibits electron and hole separation, thereby favoring ET over CT. This study not only provides significant insight into the interlayer carrier relaxation dynamics but also is crucial for the future deterministic design of 2D OIHPs heterostructure‐based optoelectronic devices.

show abstract

Manipulating Interlayer Carrier Relaxation Dynamics in Type‐II Heterostructures of 2D Hybrid Perovskites Through Organic Spacer Engineering

Han,

Qiu,

Tang

et al. 2024

Adv Funct Materials

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Waste‐To‐Energy: Sustainable Triboelectric Stimulating System Constructed by Bone Gelatin Based Triboelectric Nanogenerator for Crop Growth

Gao,

Wu,

Lyu

et al. 2024

Small

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The misuse of synthetic chemicals such as pesticides and fertilizers harms the environment and human health. Abandoning them risks global food shortages. Urgent eco‐friendly alternatives are needed for food production without excessive synthetic chemicals. To respond to this challenge, an innovative approach uses POSS polymer (PA) to modify waste bone gelatin (BG), constructinging a biodegradable triboelectric nanogenerator (PAG‐TENG) tailored for the triboelectric stimulating system for seed germination (PTSS). Amide groups of PA improve the electron supplying capacity of BG and 3D cage structure captures and transfers charges of BG, thereby improving the output performance of PAG‐TENG. The spatial electrostatic field formed by PAG‐TENG promotes seed germination when subjected to pressure changes in the environment. Hence output performance of PAG‐TENG is improved from 52.34 V and 40.25 nA to 247.15 V and 482.12 nA, the sensitivity is 14.4957 V*kPa−1. It maintains initial stable performance after the 6000 cycles of testing. Besides, the prepared PAG‐TENG has good toughness, translucency, and degradability. Treated by the high voltage electrostatic field of PTSS, peas' germination rate remarkably increased by ≈27%. This work realizes the high‐value utilization of waste resource BG, and provides a novel direction for the development of intelligent agriculture.

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Achieving 31.16 % efficiency in perovskite solar cells via synergistic Dion-Jacobson 2D-3D layer design

Verma,

Dwivedi,

Lohia

et al. 2025

Journal of Alloys and Compounds

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Charge Transfer in 2D Halide Perovskites and 2D/3D Heterostructures

Cited by 4 publications

References 83 publications

Manipulating Interlayer Carrier Relaxation Dynamics in Type‐II Heterostructures of 2D Hybrid Perovskites Through Organic Spacer Engineering

Manipulating Interlayer Carrier Relaxation Dynamics in Type‐II Heterostructures of 2D Hybrid Perovskites Through Organic Spacer Engineering

Waste‐To‐Energy: Sustainable Triboelectric Stimulating System Constructed by Bone Gelatin Based Triboelectric Nanogenerator for Crop Growth

Achieving 31.16 % efficiency in perovskite solar cells via synergistic Dion-Jacobson 2D-3D layer design

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About

Charge Transfer in 2D Halide Perovskites and 2D/3D Heterostructures

Cited by 4 publications

References 83 publications

Manipulating Interlayer Carrier Relaxation Dynamics in Type‐II Heterostructures of 2D Hybrid Perovskites Through Organic Spacer Engineering

Manipulating Interlayer Carrier Relaxation Dynamics in Type‐II Heterostructures of 2D Hybrid Perovskites Through Organic Spacer Engineering

Waste‐To‐Energy: Sustainable Triboelectric Stimulating System Constructed by Bone Gelatin Based Triboelectric Nanogenerator for Crop Growth

Achieving 31.16 % efficiency in perovskite solar cells via synergistic Dion-Jacobson 2D-3D layer design

Contact Info

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Achieving 31.16 % efficiency in perovskite solar cells via synergistic Dion-Jacobson 2D-3D layer design