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Ultrasound-Assisted Crystallization Enables Large-Area Perovskite Quasi-Monocrystalline Film for High-Sensitive X-ray Detection and Imaging
Advanced Materials ( IF 27.4 ) Pub Date : 2023-05-05 , DOI: 10.1002/adma.202210878 Wen-Guang Li 1 , Xu-Dong Wang 1 , Yu-Hua Huang 1 , Dai-Bin Kuang 1
Advanced Materials ( IF 27.4 ) Pub Date : 2023-05-05 , DOI: 10.1002/adma.202210878 Wen-Guang Li 1 , Xu-Dong Wang 1 , Yu-Hua Huang 1 , Dai-Bin Kuang 1
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In recent years, halide perovskites have shown great application potential in X-ray detection due to their superior optoelectronic properties and high X-ray attenuation coefficient. However, large-area perovskite fabrication for high performance X-ray detectors remains extremely challenging. Herein, ultrasound-assisted crystallization combined with the hot-pressing method is proposed to prepare large-area (10 cm × 10 cm) and high-quality quasi-monocrystalline thick film of a mixed-cation perovskite MA0.42FA0.58PbI3. The rapid ultrasound-assisted crystallization provides more homogeneous nucleation, which is essential to the fabrication of large-area and uniform perovskite microcrystalline film. Furthermore, the post hot-pressing treatment is implemented to fuse the crystal boundaries, rearrange the crystal grains, and eliminate the voids between crystals, resulting in a quasi-monocrystalline film. After the hot-pressing treatment, the carrier mobility and the carrier mobility-lifetime product increased about 13-fold (from 1.8 to 23.5 cm2 s−1 V−1) and 18 times (from 8.4 × 10−6 to 1.5 × 10−4 cm2 V−1), respectively. As a result, a high-performance MA0.42FA0.58PbI3 quasi-monocrystalline X-ray detector is achieved with an impressively high sensitivity (1.16 × 106 µC Gyair−1 cm−2) and low detection limit (37.4 nGyair s−1), demonstrating the potential of the ultrasound-assisted crystallization and hot-pressing strategy from an industrial perspective.
中文翻译：
超声辅助结晶可实现大面积钙钛矿准单晶薄膜，用于高灵敏度 X 射线检测和成像
近年来，卤化物钙钛矿由于其优越的光电性能和高的X射线衰减系数，在X射线检测中显示出巨大的应用潜力。然而，高性能 X 射线探测器的大面积钙钛矿制造仍然极具挑战性。本文提出超声辅助结晶结合热压法制备大面积（10 cm×10 cm）高质量的混合阳离子钙钛矿MA 0.42 FA 0.58 PbI 3准单晶厚膜。快速超声辅助结晶提供了更均匀的成核，这对于制造大面积且均匀的钙钛矿微晶薄膜至关重要。此外，进行后热压处理，使晶界融合，晶粒重新排列，消除晶体之间的空隙，形成准单晶薄膜。热压处理后，载流子迁移率和载流子迁移率-寿命乘积分别增加了约13倍（从1.8至23.5 cm 2 s -1 V -1）和18倍（从8.4 × 10 -6至1.5 × 10 -4 cm 2 V -1 )。结果，实现了高性能 MA 0.42 FA 0.58 PbI 3准单晶 X 射线探测器，具有令人印象深刻的高灵敏度（1.16 × 10 6 µC Gy空气-1 cm -2）和低检测限（37.4 nGy空气） s -1），从工业角度展示了超声辅助结晶和热压策略的潜力。
更新日期：2023-05-05
中文翻译：
超声辅助结晶可实现大面积钙钛矿准单晶薄膜，用于高灵敏度 X 射线检测和成像
近年来，卤化物钙钛矿由于其优越的光电性能和高的X射线衰减系数，在X射线检测中显示出巨大的应用潜力。然而，高性能 X 射线探测器的大面积钙钛矿制造仍然极具挑战性。本文提出超声辅助结晶结合热压法制备大面积（10 cm×10 cm）高质量的混合阳离子钙钛矿MA 0.42 FA 0.58 PbI 3准单晶厚膜。快速超声辅助结晶提供了更均匀的成核，这对于制造大面积且均匀的钙钛矿微晶薄膜至关重要。此外，进行后热压处理，使晶界融合，晶粒重新排列，消除晶体之间的空隙，形成准单晶薄膜。热压处理后，载流子迁移率和载流子迁移率-寿命乘积分别增加了约13倍（从1.8至23.5 cm 2 s -1 V -1）和18倍（从8.4 × 10 -6至1.5 × 10 -4 cm 2 V -1 )。结果，实现了高性能 MA 0.42 FA 0.58 PbI 3准单晶 X 射线探测器，具有令人印象深刻的高灵敏度（1.16 × 10 6 µC Gy空气-1 cm -2）和低检测限（37.4 nGy空气） s -1），从工业角度展示了超声辅助结晶和热压策略的潜力。
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