Three-dimensional macroporous photonic crystal enhanced photon collection for quantum dot-based luminescent solar concentrator
Three-dimensional macroporous photonic crystal enhanced photon collection for quantum dot-based luminescent solar concentrator
复制标题
DOI：
10.1016/j.nanoen.2019.104217
复制
发表时间：
2020
期刊：
影响因子：
17.6
通讯作者：
Junyu Wang;Yucheng Yuan;Hua Zhu;Tong Cai;Yin Fang;Ou Chen
中科院分区：
文献类型：
--
作者：
Junyu Wang;Yucheng Yuan;Hua Zhu;Tong Cai;Yin Fang;Ou Chen
发光太阳能聚光器（LSC）是一种光子管理装置，其可以收集、引导和聚集太阳光到小区域，使得能够随后耦合到光伏装置（PV）以增强太阳能转换。然而，通过LSC的所谓逃逸锥的固有光子损失显著限制了它们的光捕获和聚集性能。在这项工作中，我们介绍了一种简便和低成本的方法，用于制造三维（3D）大孔光子晶体（PC）过滤器作为一个有效的光子反射器，它可以被涂覆到量子点（QD）为基础的LSC设备。我们证明，通过控制PC反射带以匹配QD发射器的发射轮廓，与传统的无PC LSC相比，PC涂层LSC（PC-LSC）的光捕获效率可以显着提高，从73.3%提高到95.1%，因为减少了逃逸锥光子损失。此外，我们已经开发了一个模拟模型，考虑PC反射器的效果。实验和模拟结果都表明，由PC反射器引起的LSC器件性能的增强随着尺寸的增加而增加。事实上，模拟数据预测在更理想的条件下，PC-LSC的外量子效率（EQE）和浓度因子（C因子）最多可提高13.3倍。此外，模拟结果提供了洞察光子输出效率和PC-LSC的几何设计之间的关系。我们的研究揭示了未来的设计和制造的LSC设备增强光子收集和集中效率，通过新颖的波长选择性光子反射器。
A luminescent solar concentrator (LSC) is a photon managing device that can harvest, direct and concentrate solar light to small areas, enabling subsequent coupling to photovoltaic devices (PVs) for enhanced solar energy conversion. However, the intrinsic photon loss through the so-called escape cone of the LSCs significantly limits their light harvesting and concentrating performance. In this work, we introduce a facile and low-cost approach for the fabrication of a three-dimensional (3D) macroporous photonic crystal (PC) filter as an efficient photon reflector, which can be coated onto quantum dot (QD) based LSC devices. We demonstrate that by controlling the PC reflection band to match the emission profile of the QD emitters, the light trapping efficiency of the PC coated LSC (PC-LSC) can be significantly improved from 73.3% to 95.1% as compared to the conventional PC-free LSC due to the reduced escape cone photon loss. In addition, we have developed a simulation model that considers the PC reflector effect. Both experimental and simulation results show that the enhancement in LSC device performance induced by the PC reflector increases with increasing dimension. In fact, simulation data predicts a maximum of 13.3-fold enhancement in external quantum efficiency (EQE) and concentration factor (C factor) of the PC-LSC under more ideal conditions. Moreover, the simulation result offers insight into the relationship between photon output efficiencies and the geometric design of the PC-LSC. Our study sheds light on future design and fabrication of LSC devices with enhanced photon collection and concentrating efficiencies through novel and wavelength-selective photon reflectors.