抑制离子迁移的面/边共享三维钙钛矿单晶用于稳定x射线探测器。

IF 36.3 1区材料科学 Q1 Engineering

Nano-Micro Letters Pub Date : 2025-06-23 DOI:10.1007/s40820-025-01788-z

Zimin Zhang,Xiaoli Wang,Huayang Li,Dong Li,Yang Zhang,Nan Shen,Xue-Feng Yu,Yucheng Liu,Shengzhong Liu,Haomin Song,Yanliang Liu,Xingzhu Wang,Shi Chen

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引用次数: 0

摘要

虽然三维金属卤化物钙钛矿是直接x射线探测的有希望的候选者，但钙钛矿的离子迁移严重影响了探测器的稳定性。在此，面/边共享的三维异金属甘氨酸杂化钙钛矿Pb2CuGly2X4 (Gly = - o2c - ch2 - nh2；在水中合成了X = Cl， Br单晶（SCs），其中相邻的卤化铅层由大尺寸的Cu(Gly)2柱连接。发现Cu(Gly)2柱与面/边共享无机骨架结合能够协同抑制离子迁移，离子迁移活化能（Ea）高达1.06 eV。Pb2CuGly2Cl4 SC x射线探测器在高电场（120 V mm-1）和连续x射线照射（2.86 Gy）下具有极低的暗电流漂移，为1.20 × 10-9 nA mm-1 s-1 V-1，灵敏度高达9250 μC Gy-1 cm-2。更令人兴奋的是，Pb2CuGly2Cl4纳米晶体可以很容易地分散在水中，并直接在薄膜晶体管（TFT）阵列衬底上进行叶片涂覆，并且基于Pb2CuGly2Cl4的TFT阵列探测器具有2.2 lp mm-1的空间分辨率的x射线成像能力。

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Face-/Edge-Shared 3D Perovskitoid Single Crystals with Suppressed Ion Migration for Stable X-Ray Detector.

Although three-dimensional metal halide perovskites are promising candidates for direct X-ray detection, the ion migration of perovskites seriously affects the detector stability. Herein, face-/edge-shared 3D heterometallic glycinate hybrid perovskitoid Pb2CuGly2X4 (Gly = -O2C-CH2-NH2; X = Cl, Br) single crystals (SCs), in which the adjacent lead halide layers are linked by large-sized Cu(Gly)2 pillars, are synthesized in water. The Cu(Gly)2 pillars in combination with face-/edge-shared inorganic skeleton are found able to synergistically suppress the ion migration, delivering a high ion migration activation energy (Ea) of 1.06 eV. The Pb2CuGly2Cl4 SC X-ray detector displays extremely low dark current drift of 1.20 × 10-9 nA mm-1 s-1 V-1 under high electric field (120 V mm-1) and continuous X-ray irradiation (2.86 Gy), and a high sensitivity of 9,250 μC Gy-1 cm-2 is also achieved. More excitingly, the Pb2CuGly2Cl4 nanocrystal can be easily dispersed in water and directly blade-coated on thin-film transistor (TFT) array substrate, and the obtained Pb2CuGly2Cl4-based TFT array detector offers an X-ray imaging capability with spatial resolution of 2.2 lp mm-1.

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来源期刊

Nano-Micro Letters NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

32.60

自引率

4.90%

发文量

981

审稿时长

1.1 months

期刊介绍： Nano-Micro Letters is a peer-reviewed, international, interdisciplinary, and open-access journal published under the SpringerOpen brand. Nano-Micro Letters focuses on the science, experiments, engineering, technologies, and applications of nano- or microscale structures and systems in various fields such as physics, chemistry, biology, material science, and pharmacy.It also explores the expanding interfaces between these fields. Nano-Micro Letters particularly emphasizes the bottom-up approach in the length scale from nano to micro. This approach is crucial for achieving industrial applications in nanotechnology, as it involves the assembly, modification, and control of nanostructures on a microscale.