Smart Flexible Quantum Dot Lighting

智能柔性量子点照明

• 批准号: EP/P027628/1
• 负责人: Jong Min Kim
• 金额: $ 258.9万
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FP027628%2F1
• 关键词: Smart; Flexible; Quantum; Dot; Lighting

cQD are attracting significant interest as the key components for next-generation smart displays/lightings, photo detectors and image sensors, and solar cells. This is because they show excellent and unique physical properties such as i) high sensitivity and quantum efficiency, ii) excellent colour gamut with narrow emission (absorption) bandwidths, iii) colour tunability/band gap engineering through size control, iv) high photostability and v) high air stability as they are based on inorganic materials. Therefore, since the latest results on cQD LEDs and image sensors/photodetector have demonstrated the possibility of integration of cQD optoelectronics with current semiconducting technologies, the pace of research in the cQD area has been accelerated dramatically and an increasing number of research groups and companies are currently active in this area worldwide. The investigators expect that cQD LED will replace current technologies through: (1) Superior reliability of the inorganic structure in an almost air barrier free architecture w.r.t OLED (WVTR of 10-6 g/m2/day), (2) Lower power consumption and low product cost, 60 and 50 % less than current OLED, respectively, and (3) Colour purity of 110% or greater compared to typically 80% for OLED. This project will address will enhance the current state of the art to achieve cost reduction through using continuous, as opposed batch, cQD synthesis, mono layer resin free processing, all inorganic interface materials such as ETL (electron transport layer) and HTL (hole transport layer), device integration and packaging for EL cQD LED, with Cd-free cQDs for smart lighting and displays. The project proposed builds upon research established in the investigators' groups in Cambridge and Oxford. We are well equipped with facilities for pilot fabrication using technologies which will underpin the commercialisation of cQD LED based lighting/displays. The final deliverable will be energy efficient 4" active devices with predictable life times, and sustainable high brightness for flexible smart lighting. The elements of the smart light which will include colour hue and brightness control based on active matrix switching of pixels will also be applicable to displays, but without the same high pixel definition. We shall explore the design and synthesis of Cd-free cQDs with the core/shell structures using continuous flow production methods which can then be incorporated into active devices. Key to successfully implementing devices are the scalable production of high quality cQDs with specific surface passivation and functionalisation which limit the effects of impurities and defects and produce high quality thin films with well understood interfaces. In this project we will use scalable production techniques that can be transferred to in-line process for mass production. We shall focus on the manufacturing and processing aspects to create mono layer-controlled cQD films with entire close-packed and almost void free structure using dry-transfer printing methods. This will enhance efficiency and reliability of film for the desired mode of devices. Interface control based on a monolayer level layer-by-layer transfer process will be employed in order to obtain highly uniform monolayers which can be expanded to multilayer stacked film processing including interface layers. The interface materials for emissive cQD film with inorganic HTL and ETL layer for EL devices will also be designed and fabricated at the device integration step (WP 2-3). Driving electronics using TFTs will be designed for reliable and stable operation.Industrial partners in the supply chain for smart flexible lighting production, are: CDT Ltd for materials, lighting, metrology; CPI Ltd, Dupont-Teijin Films UK for flexible films for lighting; Emberion UK, Dyson, FlexEnable, Samsung UK for device processing, and system integration; Aixtron UK for TCF; Nanoco and Merck as materials suppliers and EAB members.

cQD作为下一代智能显示器/照明、光电探测器和图像传感器以及太阳能电池的关键组件正吸引着人们的极大兴趣。这是因为它们显示出优异和独特的物理性质，例如i）高灵敏度和量子效率，ii）具有窄发射（吸收）带宽的优异色域，iii）通过尺寸控制的颜色可调谐性/带隙工程，iv）高光稳定性和v）高空气稳定性，因为它们基于无机材料。因此，由于cQD LED和图像传感器/光电探测器的最新结果已经证明了cQD光电子与当前半导体技术集成的可能性，cQD领域的研究步伐已经大大加快，越来越多的研究小组和公司目前在全球范围内活跃在这一领域。研究人员预计，cQD LED将通过以下方式取代现有技术：（1）无机结构在关于OLED的几乎无空气屏障的结构中的上级可靠性（WVTR为10-6 g/m2/天），（2）较低的功耗和低的产品成本，分别比当前OLED低60%和50%，和（3）与OLED的通常80%相比，色纯度为110%或更高。该项目将通过使用连续（而不是分批）cQD合成、单层无树脂加工、所有无机界面材料（如ETL（电子传输层）和HTL（空穴传输层））、EL cQD LED的器件集成和封装以及用于智能照明和显示器的无Cd cQD来提高当前技术水平，以实现成本降低。拟议的项目是建立在剑桥和牛津研究小组的研究基础上的。我们拥有完善的设施，可使用可支持cQD LED照明/显示器商业化的技术进行试生产。最终交付的产品将是节能的4”有源器件，具有可预测的使用寿命，以及可持续的高亮度，适用于灵活的智能照明。智能灯的元件将包括基于像素的有源矩阵切换的色调和亮度控制，其也将适用于显示器，但没有相同的高像素清晰度。我们将探索设计和合成的无镉cQD的核/壳结构，使用连续流生产方法，然后可以被纳入到有源器件。成功实现器件的关键是可规模化生产具有特定表面钝化和功能化的高质量cQD，这限制了杂质和缺陷的影响，并产生具有良好界面的高质量薄膜。在这个项目中，我们将使用可扩展的生产技术，可以转移到大规模生产的在线过程。我们将专注于制造和加工方面，以使用干转移印刷方法创建具有整个紧密堆积和几乎无空隙结构的单层控制的cQD膜。这将提高所需器件模式的膜的效率和可靠性。将采用基于单层水平逐层转移工艺的界面控制，以获得高度均匀的单层，其可以扩展到包括界面层的多层堆叠膜处理。用于EL器件的具有无机HTL和ETL层的发射cQD膜的界面材料也将在器件集成步骤（WP 2-3）中设计和制造。智能柔性照明生产供应链中的工业合作伙伴包括：CDT有限公司，负责材料、照明和计量; CPI有限公司，Dupont-Teijin Films UK，负责照明柔性薄膜; Emberion UK，Dyson，FlexEnable，Samsung UK，负责器件加工和系统集成; Aixtron UK，负责TCF; Nanoco和Merck作为材料供应商和EAB成员。

项目成果

Highly Stable and Scalable Blue QD-LED via an Evaporated TiO2 Thin Film as an Electron Transport Layer

通过蒸发 TiO2 薄膜作为电子传输层的高度稳定且可扩展的蓝色 QD-LED

• DOI: 10.17863/cam.56836
• 发表时间: 2020
• 作者: Bang S

Cyclic production of biocompatible few-layer graphene ink with in-line shear-mixing for inkjet-printed electrodes and Li-ion energy storage

• DOI: 10.1038/s41699-021-00279-0
• 发表时间: 2022-01-12
• 期刊: NPJ 2D MATERIALS AND APPLICATIONS
• 影响因子: 9.7
• 作者: Carey, Tian;Alhourani, Abdelnour;Coleman, Jonathan N.
• 通讯作者: Coleman, Jonathan N.