Environment-friendly 0D/2D nanocomposites for broadband UV-vis-NIR-sensitive photodetectors

用于宽带紫外-可见-近红外敏感光电探测器的环保型 0D/2D 纳米复合材料

• 批准号: 424154386
• 负责人: Professor Dr. Dietrich R. T. Zahn
• 金额: --
• 依托单位: Professur Halbleiterphysik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 2023-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/424154386?language=en
• 关键词: Environment; friendly; 0D; 2D; nanocomposites

The development of new broadband-sensitive and self-powered photodetectors based on heterostructures of 0D nanocrystalline (quantum dots - QDs) and 2D few-layer and single-layer materials can be strongly boosted by the introduction of new toxic-metal free multinary chalcogenide QDs and readily available, stable semiconducting and conducting 2D nanosheets. The present project focuses on new reliable protocols of aqueous synthesis of multinary Cu(Ag)-In-Se and Cu-Zn-Sn-Se QDs with controlled composition/size, the relationships between the morphology and photophysical properties of such QDs, and the dynamics of photoinduced charge transfer in 0D/2D composites of metal-selenide QDs with single-layer reduced graphene oxide (RGO) and carbon nitride (SLCN) sheets as components of self-powered photodetectors. The project combines several inter-related research tasks, including (i) preparation of water-soluble composition- and size-selected Cu(Ag)-In-Se and Cu-Zn-Sn-Se QDs; (ii) detailed investigation of the electro- and photophysical properties of such QDs as well as their composites with SLCN and RGO; (iii) gaining deep insights into the mechanisms/dynamics of the photoinduced electron transfer between QDs and 2D moieties depending on the QD size/composition and acceptor properties of RGO and SLCN; (iv) selection of the most promising 0D/2D heterostructures as UV-vis-NIR-sensitive elements of self-powered photodetectors.This project has a distinct proof-of-concept character and will provide a fundamental basis for the design of new self-powered photodetectors with high figures of merit. It is also expected to have a marked impact on the development of new „green“ syntheses of vis-NIR-luminescing QDs, chalcogenide 0D materials with promising magnetic and thermoelectric properties, as well as broadband-sensitive photocatalysts of artificial photosynthetic processes.

基于0 D纳米晶（量子点-QD）和2D少层和单层材料的异质结构的新的宽带敏感和自供电光电探测器的开发可以通过引入新的无有毒金属的多元硫属化物QD和容易获得的稳定的半导体和导电2D纳米片来强烈地促进。本项目的重点是水相合成Cu（Ag）-In-Se和Cu-Zn-Sn-Se多元量子点的新的可靠方案，这些量子点的组成/尺寸可控，形貌与物理性质之间的关系，和金属硒化物量子点与单层还原氧化石墨烯（RGO）和氮化碳（SLCN）片作为自组装组分的0 D/2D复合材料中的光诱导电荷转移动力学。动力光电探测器该项目结合了几个相互关联的研究任务，包括（i）制备水溶性的组分和尺寸选择的Cu（Ag）-In-Se和Cu-Zn-Sn-Se量子点;（ii）详细研究此类量子点及其与SLCN和RGO的复合物的电物理和电物理性质;（iii）获得对取决于QD尺寸的QD和2D部分之间的光诱导电子转移的机制/动力学的深入了解。该项目具有明显的概念验证性质，将为设计具有高优值的新型自供电光电探测器提供基本依据。它也有望对开发新的“绿色”合成的可见-NIR发光量子点，硫属化物0 D材料具有有前途的磁性和热电性能，以及宽带敏感的人工光合作用过程的光催化剂产生显着的影响。