Design of Structural and Chemical Disorder in Metal Oxide Thin Films for Enhanced Light Absorption (EnLight)

用于增强光吸收的金属氧化物薄膜的结构和化学无序设计 (EnLight)

• 批准号: 278745182
• 负责人: Professor Dr. Evgeny Gurevich
• 金额: --
• 依托单位: Institut für Anorganische Chemie
• 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 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/278745182?language=en
• 关键词: Design; Structural; Chemical; Disorder; Metal

The interdisciplinary project - EnLight - will develop innovative materials modification processes to improve the light-management properties of metal oxide semiconductor films by laser-assisted periodic surface structuring (correlated disorder) of SnO2, TiO2, CeO2 films grown by atomic layer deposition (ALD) and chemical vapor deposition (CVD) techniques. In addition, plasma-assisted surface reduction of the above-mentioned metal oxide surfaces will be undertaken to induce valence-exchange and chemical gradient in the films that have been reported to drastically alter the optical and electrical properties. The focused nature of laser beams and random nature of plasma plume will allow evaluating tailored disorder against random disorder in terms of optical and electrical properties. This effort is focused to demonstrate that correlated structural disorder created by laser-assisted patterning of metal oxides nanolaminates and chemical (phase) disorder locally induced by chemical transformations that can create composite structures, for instance, metal nanostructures embedded in oxide matrices that can modify the optical properties such as refractive index and haze value, by transforming bimetallic oxides (e.g. spinels M'M''2O4) into M/M2O3 composites by laser irradiation. Starting from the fabrication of phase pure thin films with low defect concentration using CVD and ALD approaches, laser and plasma modification will be carried out, supported by in depth chemical, structural and functional characterization as well as simulation of laser irradiation effects to gain a detailed insight into the underlying reaction mechanisms of disorder formation. Finally the structured substrates will be tested as components in organo-lead-halide perovskite solar cells to elucidate the potential of tailored disorder in a working prototype. The expertise gained in this project will serve as a platform for other members of the Priority Program 1839 for tailored disorder of metal oxide thin films, which can be extended to flexible substrates.

该跨学科项目- EnLight -将开发创新的材料改性工艺，通过原子层沉积（ALD）和化学气相沉积（CVD）技术生长的SnO 2，TiO 2，CeO 2薄膜的激光辅助周期性表面结构（相关无序）来改善金属氧化物半导体薄膜的光管理性能。此外，上述金属氧化物表面的等离子体辅助的表面还原将进行，以诱导已报道的膜中的化合价交换和化学梯度，以彻底改变光学和电学性质。激光束的聚焦性质和等离子体羽流的随机性质将允许在光学和电学性质方面评估针对随机无序的定制无序。该努力集中于证明由金属氧化物纳米层压物的激光辅助图案化产生的相关结构无序和由化学转化局部诱导的化学（相）无序，其可以产生复合结构，例如，嵌入氧化物基质中的金属纳米结构，其可以改变光学性质，例如折射率和雾度值，通过激光辐照将尖晶石氧化物（例如尖晶石M 'M“”2 O 4）转化为M/M2 O3复合材料。从使用CVD和ALD方法制造具有低缺陷浓度的相纯薄膜开始，将进行激光和等离子体改性，通过深入的化学，结构和功能表征以及激光辐照效应的模拟来支持，以详细了解无序形成的潜在反应机制。最后，结构化衬底将作为有机铅卤化物钙钛矿太阳能电池的组件进行测试，以阐明工作原型中定制无序的潜力。在该项目中获得的专业知识将作为优先计划1839其他成员的平台，用于金属氧化物薄膜的定制无序，并可扩展到柔性基板。