Proceedings of nanoGe Fall Meeting19 (NFM19)
Publication date: 18th July 2019
X-ray photons emitted from X-ray tube used in medical imaging, industrial inspection and security check are usually contained radiation with different photon energy. Due to the penetrate ability is related to the density of object and the photon energy of X-ray, low Z (atomic number) materials such as muscle and plastics would absorb more X-rays with low photon energy(<40 keV); High Z materials such bones and iron would stop more X-rays with high photon energy (60~160 keV). As a result, the information consisted of X-ray with low photon energy could provide a better contrast of low Z materials and the information made of X-ray with high photon energy can offer more details of high Z materials. What’s more, using subtraction method, the image made of low Z materials could be subtracted from high X-ray photon energy and low X-ray photon energy which has been widely used in Lung digital radiography.
In this work, a photodiode is grown with the structure of n-type MAPbCl3(2 mm)/ P-type buffer MAPbBr3(0.2 mm)/ n-type MAPbI3(3 mm)[2]. The X-ray would incident from the MAPbCl3 face, Then X-ray with low photon energy would be fully absorbed in this layer and generate charges and high photon energy X-ray photons could arrive the MAPbI3 layer. Using different voltage bias, the charges generate in different layer could be collected separately and realize energy-selective X-ray detection.
This work is financially supported by the National Key R&D Program of China (2017YFC0111500 and 2016YFB0401600), National Natural Science Foundation Project (61775034, 61571124, 61674029), and NSFC Research Fund for International Young Scientists (61750110537). The experimental part of the work was carried out at Southeast University.
nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.
Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.
International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.