一种基于氧化锌/ZIF-67 p-n 异质结的光充电电容器，显示出更强的光电压

IF 5.3 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

APL Materials Pub Date : 2024-08-14 DOI:10.1063/5.0219883

Yanlong Lv, Xin Sun, Changhua Mi, Jianan Gu, Yanhong Wang, Meicheng Li

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引用次数: 0

摘要

光充电器件（PRD）集能量转换和储存于一体，因此一直备受关注。对于光充电器件的光电极来说，异质结的构造对于提高光电性能至关重要。本研究基于 ZnO/ZIF-67 的 p-n 异质结制作了一种双电极光充电电容器。ZIF-67 不仅是储能材料，还与 ZnO 一起形成了 p-n 异质结。在 ZnO 纳米棒上原位生长 ZIF-67 时采用了快速挥发法，以确保足够的质量负载和较少的界面缺陷。结果显示，ZIF-67 的光电压为 0.36 V（比单一氧化锌高 0.2 V），比电容为 759.0 mF/g，整体能量转换效率为 0.49%。光电压的增强归功于 p-n 异质结。此外，还制作出了一种实用的纽扣电池，在黑暗中循环 3000 次后，库仑效率仍高达 91%。

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A photo rechargeable capacitor based on the p–n heterojunction of ZnO/ZIF-67 showing enhanced photovoltage

The photo rechargeable device (PRD) has been continuously drawing attention because it combines energy conversion and storage in one device. As for the photoelectrode of PRD, the construction of heterojunction is of crucial importance to enhance the photo performance. In this work, a two-electrode photo rechargeable capacitor based on the p–n heterojunction of ZnO/ZIF-67 is fabricated. ZIF-67 not only serves as the energy storage material but also forms the p–n heterojunction together with ZnO. A fast volatilization method was adopted for the in situ growth of ZIF-67 on ZnO nanorods to ensure sufficient mass loading and fewer interface defects. The results show a photovoltage of 0.36 V (0.2 V higher than single ZnO), a specific capacitance of 759.0 mF/g, and an overall energy conversion efficiency of 0.49%. The enhanced photovoltage is attributed to the p–n heterojunction. Moreover, a practical button cell was also fabricated, with 91% Coulombic efficiency remaining after 3000 cycles in the dark.

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来源期刊

APL Materials NANOSCIENCE & NANOTECHNOLOGYMATERIALS SCIE-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

9.60

自引率

3.30%

发文量

199

审稿时长

2 months

期刊介绍： APL Materials features original, experimental research on significant topical issues within the field of materials science. In order to highlight research at the forefront of materials science, emphasis is given to the quality and timeliness of the work. The journal considers theory or calculation when the work is particularly timely and relevant to applications. In addition to regular articles, the journal also publishes Special Topics, which report on cutting-edge areas in materials science, such as Perovskite Solar Cells, 2D Materials, and Beyond Lithium Ion Batteries.