Ultrafast interfacial charge transfer regulation in organo-metal perovskites through bandgap engineering

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-03-10 DOI:10.1063/5.0251531

Zongtao Huang, Nan Gong, Shijie Du, Wei Kong, Junpeng Deng, Bohong Zheng, Yilun Zhao, Lin Ma

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引用次数: 0

Abstract

Selecting suitable materials for electron transport layers and optimizing their electronic properties are crucial for enhancing the performance of organic light-emitting diode. However, the harsh deposition conditions and high costs associated with traditional charge transport layers indicate significant potential for further optimization. Herein, we investigate charge transfer at organic-perovskite heterojunctions and explore how bandgap engineering can be utilized to modulate interfacial charge dynamics. Using transient absorption and time-resolved photoluminescence spectroscopy, we demonstrate that charge transfer at the interface of organic-perovskite heterojunction can be regulated and enhanced by increasing the energy level offset, which is achieved through the adjustment of the halide ion ratio in the perovskite material. These findings provide insights into interfacial charge transfer mechanisms and confirm the feasibility of bandgap engineering as a strategy for tailoring charge-transfer properties in organic optoelectronic devices.

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.