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Organic X-Ray Image Sensors Using a Medium Bandgap Polymer Donor with Low Dark Current

Energy & Environmental Materials 2024年第6期7卷 230-237页

作者： Jong-Woon Ha Seung Hun Eom Bo Kyung Cha Seyeong Song Hyeong Ju Eun Jong H.Kim Jong Mok Park BongSoo Kim Byoungwook Park Seo-Jin Ko Sung Cheol Yoon changjin lee In Hwan Jung Do-Hoon Hwang Department of Chemistry Chemistry Institute for Functional MaterialsPusan National UniversityBusan 46241Korea Division of Advanced Energy Materials Research Center Korea Research Institute of Chemical Technology(KRICT)Daejeon 34114Korea Electro-Medical Device Research Center Korea Electrotechnology Research Institute(KERI)Ansan 15588Korea Graduate School of Carbon Neutrality School of Energy and Chemical EngineeringUlsan National Institute of Science and Technology(UNIST)Ulsan 44919Korea Department of Molecular Science and Technology Ajou UniversitySuwon 16449Korea Research Center for Advanced Specialty Chemicals Korea Research Institute of Chemical TechnologyUlsan 44412Korea Department of Chemistry Ulsan National Institute of Science and Technology(UNIST)Ulsan 44919Korea Department of Organic and Nano Engineering Human-Tech Convergence ProgramHanyang University222 Wangsimni-roSeongdong-guSeoul 04763Korea

The development of portable X-ray detectors is necessary for diagnosing fractures in unconscious patients in emergency ***,this is quite challenging because of the heavy weight of the scintillator and silicon *** weight and thickness of X-ray detectors can be reduced by replacing the silicon layer with an organic *** study presents a novel bithienopyrroledione-based polymer donor that exhibits excellent photodetection properties even in a thick photoactive layer(~700 nm),owing to the symmetric backbone and highly soluble molecular structure of *** ability of bithienopyrroledione-based polymer donor to strongly suppress the dark current density(Jd~10−10 A cm^(−2))at a negative bias(−2.0 V)while maintaining high responsivity(R=0.29 A W−1)even at a thickness of 700 nm results in a maximum shot-noise-limited specific detectivity of D_(sh)^(*)=2.18×10^(13)Jones in the organic *** organic photodetectors are developed by slot-die coating for use in X-ray detectors,which exhibit D_(sh)^(*)=2.73×10^(12)Jones with clear rising(0.26 s)and falling(0.29 s)response times upon X-ray *** reliability is also proven by linear response of the X-ray detector,and the X-ray detection limit is 3 mA.

关键词： low dark current low detection limit organic photodetector printable X-ray

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Amorphous FeZr metal for multi-functional sensor in electronic skin

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npj Flexible Electronics 2019年第1期3卷 64-71页

作者： Minhyun Jung Eunha lee Dongseuk Kim Kyungkwan Kim changjin Yun Hyangsook lee Heegoo Kim Kungwon Rhie Sanghun Jeon Department of Electrical Engineering Korea Advanced Institute of Science and TechnologyDaehak-Ro 291Yuseong-GuDaejeonRepublic of Korea Analytical Engineering Group Platform Technology LaboratorySamsung Advanced Institue of TechnologySuwon 16678Republic of Korea Spin Convergence Research Team Korea Research Institute of Standards and ScienceDaejeon 34113Republic of Korea Department of Applied Physics Korea UniversitySejong 30019Republic of Korea

The composition of an amorphous metal,which is well known for having no slip plane or slip direction,can be tailored for enhanced strength and a lower Young’s modulus under mechanical *** crystalline metals,elastic amorphous metals can,in principle,be used as a flexible electrode in soft,wearable electronics.A metal with a lattice structure absorbs external energy,which causes structural deformations,while an amorphous metal does not absorb ***,amorphous metals have excellent mechanical properties that can overcome the limitations of crystalline ***,voids inside such metals are easily formed according to Thornton’s model,which results in the formation of mesoporous(10–50 nm)rods due to the spatial separation of metal *** eliminated the porosity in amorphous metals by controlling the kinetic energy of sputtered metal atoms and *** Fe_(33)Zr_(67) has an amorphous structure with a strength of 2.88 GPa and a Young’s modulus of 76.6 *** this amorphous metal,we fabricated a stretchable and multi-functional sensor for electronic skin that enables the detection of pressure,temperature and light and also serves as a *** this work,we demonstrate the feasibility of the amorphous metal Fe33Zr67 in soft electronics for use in various industrial applications.

关键词： amorphous metals electronic

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