当前位置：
X-MOL 学术
›
Adv. Funct. Mater.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Ultra‐Low Dark Current Organic–Inorganic Hybrid X‐Ray Detectors
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2020-11-25 , DOI: 10.1002/adfm.202008482 M. Prabodhi A. Nanayakkara 1 , Lidija Matjačić 2 , Sebastian Wood 2 , Filipe Richheimer 2 , Fernando A. Castro 2 , Sandra Jenatsch 3 , Simon Züfle 3 , Rachel Kilbride 4 , Andrew J. Parnell 4 , Mateus G. Masteghin 1 , Hashini M. Thirimanne 1 , Andrew Nisbet 5 , K. D. G. Imalka Jayawardena 1 , S. Ravi P. Silva 1
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2020-11-25 , DOI: 10.1002/adfm.202008482 M. Prabodhi A. Nanayakkara 1 , Lidija Matjačić 2 , Sebastian Wood 2 , Filipe Richheimer 2 , Fernando A. Castro 2 , Sandra Jenatsch 3 , Simon Züfle 3 , Rachel Kilbride 4 , Andrew J. Parnell 4 , Mateus G. Masteghin 1 , Hashini M. Thirimanne 1 , Andrew Nisbet 5 , K. D. G. Imalka Jayawardena 1 , S. Ravi P. Silva 1
Affiliation
|
Organic‐inorganic hybrid semiconductors are an emerging class of materials for direct conversion X‐ray detection due to attractive characteristics such as high sensitivity and the potential to form conformal detectors. However, existing hybrid semiconductor X‐ray detectors display dark currents that are 1000–10 000× higher than industrially relevant values of 1–10 pA mm−2. Herein, ultra‐low dark currents of <10 pA mm−2, under electric fields as high as ≈4 V µm−1, for hybrid X‐ray detectors consisting of bismuth oxide nanoparticles (for enhanced X‐ray attenuation) incorporated into an organic bulk heterojunction consisting of p‐type Poly(3‐hexylthiophene‐2,5‐diyl) (P3HT) and n‐type [6,6]‐Phenyl C71 butyric acid methyl ester (PC70BM) are reported. Such ultra‐low dark currents are realized through the enrichment of the hole selective p‐type organic semiconductor near the anode contact. The resulting detectors demonstrate broadband X‐ray response including an exceptionally high sensitivity of ≈1.5 mC Gy−1 cm−2 and <6% variation in angular dependence response under 6 MV hard X‐rays. The above characteristics in combination with excellent dose linearity, dose rate linearity, and reproducibility over a broad energy range enable these detectors to be developed for medical and industrial applications.
中文翻译：
超低暗电流有机-无机混合X射线探测器
有机-无机杂化半导体是一种新兴的用于直接转换X射线检测的材料，这是因为其具有诱人的特性，例如高灵敏度和形成共形检测器的潜力。但是，现有的混合半导体X射线探测器显示的暗电流比工业上相关的1-10 pA mm -2的值高1000–10000 x 。在此，在高达≈4V µm -1的电场下，小于10 pA mm -2的超低暗电流，适用于由氧化铋纳米粒子（用于增强X射线衰减）组成的混合X射线探测器。有机本体异质结，由p型聚（3-己基噻吩-2,5-二基）（P3HT）和n型[6,6]-苯基C71丁酸甲酯组成（PC 70BM）。这样的超低暗电流是通过富集阳极触点附近的空穴选择性p型有机半导体来实现的。由此产生的探测器展示了宽带X射线响应，包括在6.5 MV硬X射线下异常高的灵敏度，≈1.5mC Gy -1 cm -2，以及角度依赖性响应的变化小于6％。上述特性与出色的剂量线性，剂量率线性以及在宽泛的能量范围内的可重复性相结合，使这些检测器可以开发用于医疗和工业应用。
更新日期：2020-11-25
中文翻译：
超低暗电流有机-无机混合X射线探测器
有机-无机杂化半导体是一种新兴的用于直接转换X射线检测的材料，这是因为其具有诱人的特性，例如高灵敏度和形成共形检测器的潜力。但是，现有的混合半导体X射线探测器显示的暗电流比工业上相关的1-10 pA mm -2的值高1000–10000 x 。在此，在高达≈4V µm -1的电场下，小于10 pA mm -2的超低暗电流，适用于由氧化铋纳米粒子（用于增强X射线衰减）组成的混合X射线探测器。有机本体异质结，由p型聚（3-己基噻吩-2,5-二基）（P3HT）和n型[6,6]-苯基C71丁酸甲酯组成（PC 70BM）。这样的超低暗电流是通过富集阳极触点附近的空穴选择性p型有机半导体来实现的。由此产生的探测器展示了宽带X射线响应，包括在6.5 MV硬X射线下异常高的灵敏度，≈1.5mC Gy -1 cm -2，以及角度依赖性响应的变化小于6％。上述特性与出色的剂量线性，剂量率线性以及在宽泛的能量范围内的可重复性相结合，使这些检测器可以开发用于医疗和工业应用。
京公网安备 11010802027423号