Novel INFIQ® Lead-Free Infrared Quantum Dot Inks for Photodetection Applications

用于光电检测应用的新型 INFIQ® 无铅红外量子点墨水

• 批准号: 10057762
• 金额: $ 12.73万
• 依托单位: QUANTUM SCIENCE LTD
• 依托单位国家: 英国
• 项目类别: Launchpad
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=10057762
• 关键词: Novel; INFIQ; Lead; Free; Infrared

Photodetection of infrared (IR) light is used in many industries where the unique properties of sensing and imaging add significant capabilities beyond those of visible light. Current markets include telecommunications, surveillance, spectroscopy, thermal imaging and healthcare, with growing demand in applications for consumer/mobile devices, autonomous vehicles, and novel medical diagnostics.Colloidal quantum dot (CQD)-based IR photodetectors have shown exceptional promise to disrupt incumbent IR technologies combining wavelength tunability, high responsivity and solution processability. The current dominant technology uses lead sulphide (PbS) nanoparticles. Lead (Pb) is restricted hazardous substances under RoHS Directive 2011/65/EU; it is a heavy metal and carries environmental and health concerns. An optimal approach would avoid such compliance issue whilst minimising health and environmental impacts in a product's life cycle, from manufacture to eventual disposal.The PbS QD devices also require a layer-by-layer deposition process involving up to 14 layers. Each layer requires multiple chemical treatment and washing steps, using large volumes of chemicals and solvents that are costly and must be disposed of safely.This project will solve all these problems by developing novel lead-free QD inks and demonstrate their applications in short-wave infrared (SWIR) photodetectors, through a simple one step deposition process. To date, alternative lead-free QD materials have not been synthesised with sufficiently high quality and large scale for optoelectronic device applications. Quantum Science Ltd (QS) has proprietary processes and know-hows to make scalable lead-free SWIR CQDs demonstrating highly efficient conversion of IR light for photodetection. The current challenge is to upscale the material synthesis and provide the QDs in right status enabling simple and low-cost CQD film coating for mass production of SWIR photodetectors.In this project the lead-free CQDs will be synthesised using upscaling method, and surface functionalised with conductive ligands in the same synthesis reactor without pre-purification of the synthesised QD. Different pre-screened novel ligands, eco-friendly solvents and processing conditions will be assessed and QD ink formulations will be optimised and used to deposit films for device fabrication.This project will deliver lead-free CQD inks with leading performance in devices for mass production of high-performance SWIR photodiodes to meet our customers' requirements for the next stage of commercialisation.

红外（IR）光的光进行光检测用于许多行业，在许多行业中，传感和成像的独特属性增加了可见光的显着功能。当前市场包括电信，监视，光谱，热成像和医疗保健，以及对消费/移动设备，自动驾驶汽车的应用需求的增长以及新型的医学诊断。基于IR的固定量子点（CQD）IR光电探测器具有极大的有望破坏了较高的效果，使得能力稳定的技术效果较高，并构成高度调节性。当前的主要技术使用铅硫化物（PBS）纳米颗粒。铅（PB）是ROHS指令2011/65/EU下的受限危险物质；它是一种重金属，引起了环境和健康问题。最佳方法将避免此类合规性问题，同时从制造到最终处置中的生命周期中的健康和环境影响最小化。PBSQD设备还需要逐层沉积过程，最多涉及14层。每一层都需要多种化学处理和洗涤步骤，使用大量的化学物质和溶剂，这些化学物质和溶剂必须是昂贵的，必须安全地处理。本项目将通过开发新颖的无铅QD墨水来解决所有这些问题，并通过简单的一个步骤深度启动过程来证明其在短波红外（SWIR）光电探测器中的应用。迄今为止，尚未使用足够高质量和大规模的光电设备应用程序合成替代的无铅QD材料。 Quantum Science Ltd（QS）具有专有的过程和专有性的曲子，以使无铅的SWIR CQD表明IR光的高效转化以进行光检测。当前的挑战是提高材料合成并以正确的状态提供QD，从而实现简单且低成本的CQD膜涂层，用于批量生产SWIR光电探测器。在该项目中，将使用上尺度的方法合成无铅的CQD，并在相同的合成反应器中与无导向性配体进行表面官能化，而无需与PROTHTHESIS反应器中的pre-prepurification prepurification qudecy qd synthemate qd QD QD QD QD。将评估不同的预筛分的小说配体，生态友好的溶剂和加工条件，并将优化QD墨水配方，并用于存放用于设备制造的薄膜。该项目将提供无铅的CQD墨水，并在设备中提供领先的性能，以大量生产高表现SWIR SWIR Photodiodes，以满足我们的下一阶段的商业化需求。