Precursor (Metal-organic decomposition (MOD)) inks are used to fabricate 2D and 3D printed conductive structures directly onto a substrate. By formulating a nanoalloy structure containing multiple metals, the opportun...Precursor (Metal-organic decomposition (MOD)) inks are used to fabricate 2D and 3D printed conductive structures directly onto a substrate. By formulating a nanoalloy structure containing multiple metals, the opportunity to modify chemical and physical properties exists. In this paper, a copper-nickel bimetallic nanoalloy film was fabricated by mixing copper and nickel precursor inks and sintering them in vacuum. The individual elemental inks were formulated and characterized using SEM, EDS, and XRD. During thermal processing, elemental copper forms first and is followed by the formation of bimetallic copper-nickel alloy. The encapsulation of the underlying copper by the nickel-rich alloy provides excellent oxidation resistance. No change in film resistance was observed after the film was exposed to an oxygen plasma. Nanoalloy films printed using reactive metallic inks have a variety of important applications involving local control of alloy composition. Examples include facile formation of layered nanostructures, and electrical conductivity with oxidative stability.展开更多
The fast crystallization and facile oxidation of Sn^(2+)of tin-lead(Sn-Pb)perovskites are the biggest challenges for their applications in high-performance near-infrared(NIR)photodetectors and imagers.Here,we introduc...The fast crystallization and facile oxidation of Sn^(2+)of tin-lead(Sn-Pb)perovskites are the biggest challenges for their applications in high-performance near-infrared(NIR)photodetectors and imagers.Here,we introduce a multifunctional diphenyl sulfoxide(DPSO)molecule into perovskite precursor ink to response these issues by revealing its strong binding interactions with the precursor species.The regulated perovskite film exhibits a dense morphology,reduced defect density and prolonged carrier diffusion length.The manufactured self-powered photodetector realizes a spectral response of 300-1100 nm,dark current density of 4.7×10^(−8)mA cm^(−2),peak responsivity of 0.49 A W^(−1)and specific detectivity of 1.20×10^(12)Jones in NIR region(780-1100 nm),-3 dB bandwidth of 11.4 MHz,linear dynamic range of 174 dB,and ultrafast rise/fall time of 14.2/17.1 ns,respectively.We demonstrate a 64×64 NIR imager with an impressive spatial resolution of 1.32 lp mm^(−1)by monolithically integrating the photodetector with a commercial thin-film transistor readout circuit.展开更多
文摘Precursor (Metal-organic decomposition (MOD)) inks are used to fabricate 2D and 3D printed conductive structures directly onto a substrate. By formulating a nanoalloy structure containing multiple metals, the opportunity to modify chemical and physical properties exists. In this paper, a copper-nickel bimetallic nanoalloy film was fabricated by mixing copper and nickel precursor inks and sintering them in vacuum. The individual elemental inks were formulated and characterized using SEM, EDS, and XRD. During thermal processing, elemental copper forms first and is followed by the formation of bimetallic copper-nickel alloy. The encapsulation of the underlying copper by the nickel-rich alloy provides excellent oxidation resistance. No change in film resistance was observed after the film was exposed to an oxygen plasma. Nanoalloy films printed using reactive metallic inks have a variety of important applications involving local control of alloy composition. Examples include facile formation of layered nanostructures, and electrical conductivity with oxidative stability.
基金financially supported by the National Key Research and Development Program of China(2022YFA1404201)the National Natural Science Foundation of China(62205187,U23A20380,U22A2091,62222509,62127817,62075120,62075122,and 62105193)+1 种基金the Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China(IRT_17R70)the Fund for Shanxi“1331 Project”Key Subjects Construction,the Fundamental Research Program of Shanxi Province(202103021223032,202203021222107).
文摘The fast crystallization and facile oxidation of Sn^(2+)of tin-lead(Sn-Pb)perovskites are the biggest challenges for their applications in high-performance near-infrared(NIR)photodetectors and imagers.Here,we introduce a multifunctional diphenyl sulfoxide(DPSO)molecule into perovskite precursor ink to response these issues by revealing its strong binding interactions with the precursor species.The regulated perovskite film exhibits a dense morphology,reduced defect density and prolonged carrier diffusion length.The manufactured self-powered photodetector realizes a spectral response of 300-1100 nm,dark current density of 4.7×10^(−8)mA cm^(−2),peak responsivity of 0.49 A W^(−1)and specific detectivity of 1.20×10^(12)Jones in NIR region(780-1100 nm),-3 dB bandwidth of 11.4 MHz,linear dynamic range of 174 dB,and ultrafast rise/fall time of 14.2/17.1 ns,respectively.We demonstrate a 64×64 NIR imager with an impressive spatial resolution of 1.32 lp mm^(−1)by monolithically integrating the photodetector with a commercial thin-film transistor readout circuit.
