Disordered photonics coupled with embedded nano-Au plasmonics inducing efficient photocurrent enhancement
Disordered photonics coupled with embedded nano-Au plasmonics inducing efficient photocurrent enhancement
复制标题
无序光子学与嵌入式纳米金等离子体激元相结合，诱导有效的光电流增强
DOI：
10.1016/j.talanta.2017.08.005
复制
发表时间：
2018-01-01
期刊：
影响因子：
6.1
通讯作者：
Li, Hongbo
中科院分区：
文献类型：
--
作者：
Li, Jing;Wang, Junling;Li, Hongbo
空间有序曾经被认为是光子学的一大优势；但最近，对无序的研究因其强烈的随机光散射而进入了人们的视野。本工作首先以Au-ZnO纳米线阵列为模型，研究了无序光子学与等离子体激元耦合有效增强光电流。采用无模板电沉积法制备了金氧化锌纳米线阵列。在优化的等离子体衬底上，无序增强的Au-ZnO纳米线阵列的光电流约为氧化锌纳米线阵列的20倍。Au纳米粒子的等离子体效应，如局域表面等离激元、表面等离激元极化和杂化结构中的无序增强光子学，都可以通过增强对模拟太阳光的俘获和电荷载流子的收集来提高光电转换效率。这里，无序光子学与等离子体激元耦合来解释光电流增强的原因。这项工作也为半导体器件中等离子体贵金属的制备提供了一条简便的途径。
Spatial order used to be considered as a benefit for photonics; but recently the study of disorder has broken into people's horizons for its strong random scattering of light. In this work, disordered photonics coupled with plasmonics for efficiently enhanced photocurrent was first investigated using Au-ZnO nanowire array as a model. The embedded Au-ZnO nanowire array was facilely prepared using a template-free electrodeposition method. On the optimal plasmonic substrate, the photocurrent of disorder-enhanced Au-ZnO nanowire array is about 20-fold that of ZnO nanowire array. Both the plasmonic effect of Au NPs such as localized surface plasmons, surface plasmon polarizations and the disorder-enhanced photonics in the hybrid structure are available to improve the photoelectric conversion efficiency by enhancing the trapping of the simulated sunlight and the collection of charge carriers. Herein, disordered photonics was coupled with plasmonics to explain for the enhanced photocurrent. This work also provided a facile fabricating avenue for plasmonic noble metal embedded in semiconductor devices.