文中展示了一种基于IGZO/NiO/PbSe纳米带阵列异质结结构的双极结型红外光电晶体管作为先进的快速光敏核心,能够满足近红外药液检测的需求。其中,PbSe纳米带阵列可以增强探测器对于红外波段的光吸收,加强光生载流子的收集。实验表明该晶...文中展示了一种基于IGZO/NiO/PbSe纳米带阵列异质结结构的双极结型红外光电晶体管作为先进的快速光敏核心,能够满足近红外药液检测的需求。其中,PbSe纳米带阵列可以增强探测器对于红外波段的光吸收,加强光生载流子的收集。实验表明该晶体管具有高动态探测率(1.14×10^(12)Jones)和高响应度(4100 A/W)的优点,能够完美兼容自主设计的高精度差分负反馈锁相放大电路,通过观察到检测出的二次谐波(Twice the Fundamental Frequency,2f)信号的振幅与溶质之间存在良好的线性关系,继而能够准确推断出药液中溶质的种类和浓度信息。展开更多
Thermoelectric materials possess the unique capability to convert thermal energy into electric energy and vice versa,making them promising for waste heat recovery and efficient cooling systems.Currently,extensively in...Thermoelectric materials possess the unique capability to convert thermal energy into electric energy and vice versa,making them promising for waste heat recovery and efficient cooling systems.Currently,extensively investigated thermoelectric materials such as Bi2Te3,PbTe and GeTe exhibit superior thermoelectric properties at room temperature and medium temperature regions.However,the broad application of these thermoelectric materials has been impeded by the high cost and restricted accessibility of Te and Ge in the earth's crust.Over the past few years,researchers have shown increasing interest in PbSe-and PbS-based materials,primarily attributed to their abundant elemental supply and relatively low costs.The assessment of research progress and a comprehensive overview of optimization strategies in time can significantly contribute to further improving the thermoelectric performance.These strategies include optimizing carrier concentration(aliovalent doping,dynamic doping and defect state),enhancing density-of-state effective mass(band convergence,band flattening and energy filtering effect),optimizing carrier mobility(band sharpening and band alignment)and reducing lattice thermal conductivity(all-scale hierarchical defect structures designing).This systematic summary and analysis provide novel insights and perspectives for the development of thermoelectric materials.展开更多
PbSe nanoparticles with dendrites have been prepared by sonoelectrochemical method from an aqueous solution containing Pb(Ac)2 and Na2SeSO3 in the presence of Trisodium Citrate (TSC). The nanoparticles were characteri...PbSe nanoparticles with dendrites have been prepared by sonoelectrochemical method from an aqueous solution containing Pb(Ac)2 and Na2SeSO3 in the presence of Trisodium Citrate (TSC). The nanoparticles were characterized by using powder X ray diffraction (XRD), transmission electron microscope (TEM) and X ray photoelectron spectroscopy(XPS). XRD patterns show the presence of diffraction peaks corresponding to the (111), (200),(220), (311), (222) planes of cubic PbSe. The TEM image shows dendrits PbSe in the presence of TSC, while in the presence of Potassium Nitrilotriacetate(NTA) the TEM image shows monodisperse spherical nanoparticles with an average size of 20nm. The effects of electrolysis and complexing agents on particle size and shape were also discussed.展开更多
文摘文中展示了一种基于IGZO/NiO/PbSe纳米带阵列异质结结构的双极结型红外光电晶体管作为先进的快速光敏核心,能够满足近红外药液检测的需求。其中,PbSe纳米带阵列可以增强探测器对于红外波段的光吸收,加强光生载流子的收集。实验表明该晶体管具有高动态探测率(1.14×10^(12)Jones)和高响应度(4100 A/W)的优点,能够完美兼容自主设计的高精度差分负反馈锁相放大电路,通过观察到检测出的二次谐波(Twice the Fundamental Frequency,2f)信号的振幅与溶质之间存在良好的线性关系,继而能够准确推断出药液中溶质的种类和浓度信息。
基金supported by the Doctoral Research Startup Funding of Shijiazhuang University(No.22BS006)the National Natural Science Foundation of China(No.52102234)+1 种基金Hebei Province Introduced Overseas Talents Funding Project(No.C20210313)the College Students Innovation and Entrepreneurship Training Program of Shijiazhuang University(No.scxm063)。
文摘Thermoelectric materials possess the unique capability to convert thermal energy into electric energy and vice versa,making them promising for waste heat recovery and efficient cooling systems.Currently,extensively investigated thermoelectric materials such as Bi2Te3,PbTe and GeTe exhibit superior thermoelectric properties at room temperature and medium temperature regions.However,the broad application of these thermoelectric materials has been impeded by the high cost and restricted accessibility of Te and Ge in the earth's crust.Over the past few years,researchers have shown increasing interest in PbSe-and PbS-based materials,primarily attributed to their abundant elemental supply and relatively low costs.The assessment of research progress and a comprehensive overview of optimization strategies in time can significantly contribute to further improving the thermoelectric performance.These strategies include optimizing carrier concentration(aliovalent doping,dynamic doping and defect state),enhancing density-of-state effective mass(band convergence,band flattening and energy filtering effect),optimizing carrier mobility(band sharpening and band alignment)and reducing lattice thermal conductivity(all-scale hierarchical defect structures designing).This systematic summary and analysis provide novel insights and perspectives for the development of thermoelectric materials.
文摘PbSe nanoparticles with dendrites have been prepared by sonoelectrochemical method from an aqueous solution containing Pb(Ac)2 and Na2SeSO3 in the presence of Trisodium Citrate (TSC). The nanoparticles were characterized by using powder X ray diffraction (XRD), transmission electron microscope (TEM) and X ray photoelectron spectroscopy(XPS). XRD patterns show the presence of diffraction peaks corresponding to the (111), (200),(220), (311), (222) planes of cubic PbSe. The TEM image shows dendrits PbSe in the presence of TSC, while in the presence of Potassium Nitrilotriacetate(NTA) the TEM image shows monodisperse spherical nanoparticles with an average size of 20nm. The effects of electrolysis and complexing agents on particle size and shape were also discussed.
