ECCS-EPSRC: A new generation of cost-effective, scalable and stable radiation detectors with ultrahigh detectivity

ECCS-EPSRC：具有超高探测率的新一代经济高效、可扩展且稳定的辐射探测器

• 批准号: EP/Y032942/1
• 负责人: Robert L. Z. Hoye
• 金额: $ 97.63万
• 依托单位: University of Oxford
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2024
• 资助国家: 英国
• 起止时间: 2024 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FY032942%2F1
• 关键词: ECCS; EPSRC; new; generation; cost

Significantly improved performance of radiation detectors has recently been achieved with lead-halide perovskite single crystals. However, the high lead (Pb) content exceeds the maximum limit set in many jurisdictions (including in the US and UK), and the facile ionic conductivity in these materials limits the range of electric fields that can be applied, thus limiting their operational stability. This proposal will address the challenges of current X-ray detectors, including the use of toxic elements, limited performance, high manufacturing costs, and limited charge-carrier transport. Our preliminary results have shown that BiOI can be the ideal non-toxic alternative to the Pb-based perovskites for next generation radiation detectors because of its high sensitivity and the ability to detect ultralow does rates of X-rays, which arise from its composition of heavy elements, large mobility-lifetime products, and high resistivities. To transfer this technology to industry and to have an impact on medical imaging and nuclear security, we will further 1) improve the mobility-lifetime product to well above 6 +/- 2 x 10^-2 cm2 V-1 s-1 through compositional engineering, 2) increase the size of the detectors by an order of magnitude (from 5 mm currently) without compromising on performance, and 3) optimize the device architecture and imaging performance. The overall aim of this joint research between US team (University at Buffalo) and the UK team (University of Oxford and University of Cambridge) is to develop a new generation of cost-effective, stable and up-scaled bismuth-based radiation detectors capable of detecting three orders of magnitude lower dose rates than the current commercial standard.

最近，使用六盐钙钛矿单晶实现了辐射探测器的性能。但是，高铅（PB）含量超过了许多司法管辖区（包括在美国和英国）中设置的最大限制，并且在这些材料中易于的离子电导率限制了可以应用的电场范围，从而限制了其操作稳定性。该提案将解决当前X射线探测器的挑战，包括使用有毒元素，有限的性能，高生产成本和有限的电荷运输运输。我们的初步结果表明，Bioi可以是基于PB的钙钛矿的理想无毒替代品，用于下一代辐射探测器，因为其高灵敏度和检测到Ultralow的能力确实具有X射线的速率，这是由于其重型元素的组成而产生的，这是由于其重型元素的组成，大型移动性 - 容易发生的产品和高电阻率。要将这项技术转移到行业并对医学成像和核安全产生影响，我们将进一步将途中的产品提高到6 +/- 2 x 10^-2 x 10^-2 cm2 cm2 cm2 v-1 s-1，通过组成工程（2）增加探测器的大小，而不是通过5毫米（目前的5 mm）（从5 mm）（从5 mm）（从5 mm）上增加效果，而无需对性能进行兼容，以及3）最佳性能和3）最佳性能架构和成像。这项联合研究的总体目的是美国团队（布法罗大学）和英国团队（牛津大学和剑桥大学），是开发新一代的新一代成本效益，稳定且基于基于bismuth的放射线辐射探测器，能够检测到比当前商业标准低的三个尺度剂量率。