Qin Ken, Zhang Jia-He, Zhou Ruo-Long, Sun Xue, Wang He-Xuan, Peng Jia-Li, Zhang Min-Shu, Dun Guan-Hua, Xie Dan, Tian He, Yang Yi, Ren Tian-Ling
School of Integrated Circuits and Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing, 100084, P. R. China.
State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, 250100, P. R. China.
Adv Sci (Weinh). 2025 Sep;12(34):e03597. doi: 10.1002/advs.202503597. Epub 2025 Jul 12.
Perovskite-based detectors for γ-rays have emerged relatively recently and have attracted limited attention. Although increasing efforts are being directed towards their development, the absence of an adaptive processor, systematic theoretical framework, and various applications limit its further development. In this paper, drawing inspiration from the commercial detectors, electrode configuration is improved to reshape the bias electric field, guide the effective signal carrier, and mitigate the noise from the side section. Through theoretical analysis, simulations, and experimental comparisons, the clear improvement of energy resolution from 7% to ≈5% is demonstrated, and the highest resolution of 1.9% is observed. Furthermore, to fill up the research framework of radiation, the definition of X-ray sensitivity is extended to quantitatively describe the γ-ray response, and assess the performance of γ-ray detectors, reaching a sensitivity ≈10 µC Gy cm. Based on these, a spectral-enhanced imaging strategy is proposed to broaden the application of γ-Ray detectors, where the spectral dimension of images is utilized to improve contrast and enhance imaging quality.
基于钙钛矿的γ射线探测器是最近才出现的，受到的关注有限。尽管人们越来越努力地推动其发展，但缺乏自适应处理器、系统的理论框架以及各种应用限制了它的进一步发展。在本文中，从商业探测器中汲取灵感，改进了电极配置，以重塑偏置电场，引导有效信号载流子，并减轻侧面部分的噪声。通过理论分析、模拟和实验比较，证明了能量分辨率从7%明显提高到了约5%，并观察到了1.9%的最高分辨率。此外，为了完善辐射研究框架，扩展了X射线灵敏度的定义，以定量描述γ射线响应，并评估γ射线探测器的性能，灵敏度达到了约10 µC Gy cm。基于这些，提出了一种光谱增强成像策略，以拓宽γ射线探测器的应用，利用图像的光谱维度来提高对比度并增强成像质量。
