Low-cost manufacture of flat panel x-ray image detectors using lead halide perovskites

使用卤化铅钙钛矿低成本制造平板 X 射线图像探测器

• 批准号: 506404-2017
• 负责人: Kelly, Timothy
• 金额: $ 8.4万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Strategic Projects - Group
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=693010
• 关键词: Low; cost; manufacture; flat; panel

The ultimate goal of this project is to produce new flat panel X-ray image detectors (used in mammographic screening for breast cancer) with increased sensitivity at a substantially reduced cost. This will be achieved by replacing the semiconductor currently used in these devices (arsenic-doped amorphous selenium) with lead halide perovskites. This family of perovskite materials has had a transformative impact on solar energy research, owing to a unique combination of high absorption cross-section, high charge carrier mobility, and solution processability. We aim to have a similar impact on the field of X-ray image detectors. Since these materials can be deposited using solution-based approaches that are both cost- and energy-efficient, as well as highly scalable, large reductions in manufacturing costs and energy inputs are expected. Additionally, the high X-ray absorption cross-section of these lead-based materials should lead to improvements in detector sensitivity. The project has two major research thrusts: (i) the synthesis of new perovskite materials and an evaluation of their potential as X-ray photoconductors; (ii) the development of slot-die coating technology for the fabrication of perovskite-based X-ray image detectors. If successful, this work would give the sponsoring company (Analogic Canada) a world-leading detector technology and a tremendous competitive advantage.

该项目的最终目标是生产新的平板X射线图像探测器（用于乳腺癌的乳房X线检查），以大幅降低成本提高灵敏度。这将通过用卤化铅钙钛矿取代目前在这些设备中使用的半导体（砷掺杂的非晶硒）来实现。由于高吸收截面、高电荷载流子迁移率和溶液可加工性的独特组合，这一系列钙钛矿材料对太阳能研究产生了变革性的影响。我们的目标是对X射线图像探测器领域产生类似的影响。由于这些材料可以使用基于溶液的方法沉积，这些方法既节约成本又节能，而且可高度扩展，因此预计制造成本和能源投入会大幅降低。此外，这些铅基材料的高X射线吸收截面应导致检测器灵敏度的提高。该项目有两个主要的研究方向：（i）合成新的钙钛矿材料并评估其作为X射线光电导体的潜力;（ii）开发用于制造钙钛矿X射线图像探测器的狭缝式模具涂层技术。如果成功，这项工作将为赞助公司（Analogic Canada）提供世界领先的探测器技术和巨大的竞争优势。