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用于光电器件的量子点/二氧化钛中，等离子体金纳米粒子修饰的碳纳米管的协同效应。

Synergistic Effect of Plasmonic Gold Nanoparticles Decorated Carbon Nanotubes in Quantum Dots/TiO for Optoelectronic Devices.

作者信息

Selopal Gurpreet Singh, Mohammadnezhad Mahyar, Besteiro Lucas V, Cavuslar Ozge, Liu Jiabin, Zhang Hui, Navarro-Pardo Fabiola, Liu Guiju, Wang Maorong, Durmusoglu Emek G, Acar Havva Yagci, Sun Shuhui, Zhao Haiguang, Wang Zhiming M, Rosei Federico

机构信息

Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Chengdu 610054 P. R. China.

Centre Énergie Matériaux et Télécommunications Institut National de la Recherché Scientifique 1650 Boul. Lionel Boulet Varennes Québec J3X 1S2 Canada.

出版信息

Adv Sci (Weinh). 2020 Aug 26;7(20):2001864. doi: 10.1002/advs.202001864. eCollection 2020 Oct.

DOI:10.1002/advs.202001864
PMID:33101875
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7578890/
Abstract

Here, a facile approach to enhance the performance of solar-driven photoelectrochemical (PEC) water splitting is described by means of the synergistic effects of a hybrid network of plasmonic Au nanoparticles (NPs) decorated on multiwalled carbon nanotubes (CNTs). The device based on TiO-Au:CNTs hybrid network sensitized with colloidal CdSe/(CdSe S )/(CdS) core/alloyed shell quantum dots (QDs) yields a saturated photocurrent density of 16.10 ± 0.10 mA cm [at 1.0 V vs reversible hydrogen electrode (RHE)] under 1 sun illumination (AM 1.5G, 100 mW cm), which is ≈26% higher than the control device. The in-depth mechanism behind this significant improvement is revealed through a combined experimental and theoretical analysis for QDs/TiO-Au:CNTs hybrid network and demonstrates the multifaceted impact of plasmonic Au NPs and CNTs: i) hot-electron injection from Au NPs into CNTs and TiO; ii) near-field enhancement of the QDs absorption and carrier generation/separation processes by the plasmonic Au NPs; iii) enhanced photoinjected electron transport due to the highly directional pathways offered by CNTs. These results provide fundamental insights on the properties of QDs/TiO-Au:CNTs hybrid network, and highlights the possibility to improve the performance of other solar technologies.

摘要

在此，我们描述了一种通过装饰在多壁碳纳米管（CNT）上的等离子体金纳米颗粒（NP）混合网络的协同效应来提高太阳能驱动光电化学（PEC）水分解性能的简便方法。基于用胶体CdSe/(CdSe S )/(CdS)核/合金壳量子点（QD）敏化的TiO-Au:CNT混合网络的器件，在1个太阳光照（AM 1.5G，100 mW cm）下，在1.0 V对可逆氢电极（RHE）时产生的饱和光电流密度为16.10±0.10 mA cm，比对照器件高约26%。通过对QD/TiO-Au:CNT混合网络的实验和理论相结合的分析，揭示了这一显著改善背后的深入机制，并证明了等离子体金NP和CNT的多方面影响：i）从金NP向CNT和TiO的热电子注入；ii）等离子体金NP对QD吸收以及载流子产生/分离过程的近场增强；iii）由于CNT提供的高度定向路径而增强的光注入电子传输。这些结果为QD/TiO-Au:CNT混合网络的性质提供了基本见解，并突出了改善其他太阳能技术性能的可能性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddf/7578890/a15866280b8e/ADVS-7-2001864-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddf/7578890/f806d8e55efa/ADVS-7-2001864-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddf/7578890/67dd6d815c9f/ADVS-7-2001864-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddf/7578890/0cb3dd0ff7bf/ADVS-7-2001864-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddf/7578890/15a4a8ee4346/ADVS-7-2001864-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddf/7578890/f76ce1d8ae1f/ADVS-7-2001864-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddf/7578890/e6eabced7902/ADVS-7-2001864-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddf/7578890/a15866280b8e/ADVS-7-2001864-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddf/7578890/f806d8e55efa/ADVS-7-2001864-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddf/7578890/67dd6d815c9f/ADVS-7-2001864-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddf/7578890/0cb3dd0ff7bf/ADVS-7-2001864-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddf/7578890/15a4a8ee4346/ADVS-7-2001864-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddf/7578890/f76ce1d8ae1f/ADVS-7-2001864-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddf/7578890/e6eabced7902/ADVS-7-2001864-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddf/7578890/a15866280b8e/ADVS-7-2001864-g007.jpg

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