Light management by disordered nano-structures for optoelectronic devices (LAMBDA)

用于光电器件的无序纳米结构的光管理 (LAMBDA)

• 批准号: 278746617
• 负责人: Dr. Karsten Bittkau
• 金额: --
• 依托单位: Lichttechnisches Institut (LTI)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/278746617?language=en
• 关键词: Light; management; disordered; nano; structures

The present proposal falls into the field of light management for optoelectronic thin film devices using 2D planar disordered nano-structures. The latter are designed to act as an efficient scattering architecture whose main goal is to improve the outcoupling properties of white organic light emitting diodes (WOLEDs), and consequently to increase their power efficiency. The methodology and structures developed here will also have direct implications for the field of photovoltaics. Thus, it is planned to test the engineered structures to ameliorate the light-trapping capabilities of amorphous silicon thin-film solar cells, which possess a comparable spectral range of operation as WOLEDs.As a prerequisite for any experimental investigations, a mature fabrication route for the creation of photonic structures with controllable disorder properties will be established using a versatile, large area, wet-chemical technique based on lateral phase separation. In order to optimize the structures produced, a novel optical modeling method will be developed enabling the rigorous calculation of the scattering by a large ensemble of cylindrical scattering centers embedded in a thin film system with low computational resources demands. It will also be used in combination with advanced techniques of scanning near-field optical microscopy to provide further insights into the physical mechanisms at play. The information derived from those analyses will facilitate the integration of the scattering layers into the two targeted devices, and their impact in terms of efficiency increase will be measured.Within the scope of this interdisciplinary experimental/ theoretical study, specific questions related to light scattering by planar pseudo-disordered structures inside thin films systems are addressed, and encompass the influence of those layers on coherent multi-scattering phenomena, on the excitons life time or on the extraction of surface plasmon polaritons.

本提议福尔斯属于使用2D平面无序纳米结构的光电薄膜器件的光管理领域。后者被设计成充当有效的散射架构，其主要目标是改善白色有机发光二极管（WOLED）的外耦合特性，并因此提高其功率效率。这里开发的方法和结构也将对光化学领域产生直接影响。因此，计划测试工程结构以改善非晶硅薄膜太阳能电池的光捕获能力，非晶硅薄膜太阳能电池具有与WOLEDs相当的操作光谱范围。作为任何实验研究的先决条件，将使用多功能，大面积，基于横向相分离的湿化学技术。为了优化所产生的结构，将开发一种新的光学建模方法，使得能够严格计算嵌入在薄膜系统中的大量圆柱形散射中心的散射，具有低的计算资源需求。它还将与扫描近场光学显微镜的先进技术结合使用，以进一步了解正在发挥作用的物理机制。从这些分析中得到的信息将有助于将散射层集成到两个目标器件中，并将测量它们在效率增加方面的影响。在这个跨学科的实验/理论研究范围内，解决了与薄膜系统内部平面伪无序结构的光散射相关的具体问题，并且包括这些层对相干多散射现象、对激子寿命或对表面等离子体激元的提取的影响。