介绍了多波段红外探测器的应用开发进展,并且针对多波段信号同时探测的红外器件特点进行了读出电路设计。其中,Pixel输入级为多波段红外探测器读出电路设计的核心关键模块之一。本文设计采用了缓冲直接注入型(Buffered Direct Injection...介绍了多波段红外探测器的应用开发进展,并且针对多波段信号同时探测的红外器件特点进行了读出电路设计。其中,Pixel输入级为多波段红外探测器读出电路设计的核心关键模块之一。本文设计采用了缓冲直接注入型(Buffered Direct Injection,BDI)像素输入级电路结构,具有高稳定性、低等效输入阻抗的特点,有效提高长波器件的注入效率,并且为光电探测器件提供了稳定的工作条件。以CMOS 0.18μm 5 V标准工艺基础,完成了全电路设计与模拟仿真。结果表明:70 K低温下电路功能正常,40μm间距内含有短、中、长4波段像素输入级,输入级积分信号输出线性度达到99.7%,噪声不超过0.3 mV。展开更多
Using simple and eco-friendly ethanol solvothermal treatment,dual-emission biomass carbon quantum dots(D-BCQDs)were synthesized from biomass viburnum awabuki leaves.Under excitation with 413 nm wavelength light two em...Using simple and eco-friendly ethanol solvothermal treatment,dual-emission biomass carbon quantum dots(D-BCQDs)were synthesized from biomass viburnum awabuki leaves.Under excitation with 413 nm wavelength light two emission peaks appeared at 490 and 675 nm and the dots could be tuned to emit crimson,red,purplish red,purple and blue-gray fluorescence by changing the solvothermal temperature from 140℃ to 160,180,200 and 240℃,respectively.XPS and FTIR characterization in-dicated that the fluorescence color was mainly determined by surface oxidation defects,elemental nitrogen and sp^(2)-C/sp^(3)-C hybrid-ized structural domains.The D-BCQDs could not only detect Fe^(3+)or Cu^(2+),but also quantify the concentration ratio of Fe^(3+)to Cu^(2+)in a solution containing both,demonstrating their potential applications in the simultaneous detection of Fe^(3+)and Cu^(2+)ions.展开更多
文摘Using simple and eco-friendly ethanol solvothermal treatment,dual-emission biomass carbon quantum dots(D-BCQDs)were synthesized from biomass viburnum awabuki leaves.Under excitation with 413 nm wavelength light two emission peaks appeared at 490 and 675 nm and the dots could be tuned to emit crimson,red,purplish red,purple and blue-gray fluorescence by changing the solvothermal temperature from 140℃ to 160,180,200 and 240℃,respectively.XPS and FTIR characterization in-dicated that the fluorescence color was mainly determined by surface oxidation defects,elemental nitrogen and sp^(2)-C/sp^(3)-C hybrid-ized structural domains.The D-BCQDs could not only detect Fe^(3+)or Cu^(2+),but also quantify the concentration ratio of Fe^(3+)to Cu^(2+)in a solution containing both,demonstrating their potential applications in the simultaneous detection of Fe^(3+)and Cu^(2+)ions.
