通过CdS纳米线的能量转移增强沸石咪唑酯骨架中的光捕获能力。

Enhanced light harvesting ability in zeolitic imidazolate frameworks through energy transfer from CdS nanowires.

作者信息

Zhou Yixuan, Hu Wenhui, Yang Sizhuo, Huang Jier

机构信息

School of Applied Physics and Materials, Wuyi University, Jiangmen, 529020, China and Department of Chemistry, Marquette University, Milwaukee, Wisconsin 53201, USA.

Department of Chemistry, Marquette University, Milwaukee, Wisconsin 53201, USA.

出版信息

Phys Chem Chem Phys. 2020 Feb 19;22(7):3849-3854. doi: 10.1039/c9cp06634a.

DOI:10.1039/c9cp06634a

PMID:32022047

Abstract

Zeolitic imidazolate frameworks (ZIFs) represent a novel class of porous crystalline materials that have demonstrated potential as light harvesting materials for solar energy conversion. In order to facilitate their application in solar energy conversion, it is necessary to expand their absorption further into the realm of the solar spectrum. In this work, we report the incorporation of semiconductor cadmium sulfide nanowires (CdS NWs) into ZIF-67 (CdS@ZIF-67), where a broader region of the solar spectrum can be absorbed by CdS NWs and relayed to ZIF-67 through an energy transfer (EnT) process. Using steady-state emission and time resolved emission and absorption spectroscopy, we show that efficient EnT can occur from CdS NWs to ZIF-67 by selective excitation of CdS NWs. The EnT time is ∼729.9 ps, which corresponds to 71.2% EnT efficiency.

摘要

沸石咪唑酯骨架材料（ZIFs）是一类新型的多孔晶体材料，已展现出作为太阳能转换光捕获材料的潜力。为促进其在太阳能转换中的应用，有必要将其吸收范围进一步扩展至太阳光谱领域。在本工作中，我们报道了将半导体硫化镉纳米线（CdS NWs）掺入ZIF-67（CdS@ZIF-67），其中CdS NWs可吸收更宽区域的太阳光谱，并通过能量转移（EnT）过程传递给ZIF-67。通过稳态发射、时间分辨发射和吸收光谱，我们表明通过选择性激发CdS NWs，可实现从CdS NWs到ZIF-67的高效EnT。EnT时间约为729.9 ps，对应71.2%的EnT效率。