稀土掺杂的CdE（E=S或Se）三元化合物半导体纳米带及其有机钙钛矿杂化材料多波段光探测和红外探测研究

用场发射扫描电镜，高分辨透射电镜，四探针Nanoprobe系统，皮秒光谱仪等研究单片一维稀土掺杂CdE(E=S或Se)三元化合物纳米带(电缆)、侧向异质结纳米带及其与有机金属卤化物钙钛矿杂化材料的结构、成分、电学性质、变温光导和光电探测性质。确定纳米带微结构、成分、有机金属卤化物钙钛矿材料及金纳米粒子对光导、多波段光探测和红外探测性质的影响及不同厚度的纳米结构光电探测的尺寸效应。揭示材料结构、成分、光谱等与光电探测性质的关系。结合理论研究阐明稀土掺杂、应力、有机金属卤化物钙钛矿吸收层及金纳米粒子的表面等离子体增强效应等对多波段光探测、红外探测作用的物理机制。从而研制高响应、高探测率、高外量子转化效率的纳米多波段光电探测器和红外探测器。本项目的研究有可能促成可与InGaAs三波段探测器相比拟的多波段非制冷红外探测纳米器件的面世，并为研制多波段非制冷红外探测材料提供有价值的研究结果。

Semiconductor CdE (E=S or Se) doped with rare earth (denoted as CdSRE) and their alloyed ternary nanoribbons (nanocables) and nanoribbon lateral heterostructures were studied by FE-SEM, HRTEM and four nanoprobes, picosecond spectrometer, near-field optical microscope-NSOM & nano-optoelectronics analysis platform. The effects of the microstructure and composition of CdSRE nanomaterials and their hybrid organic perovskite materials on electronic, photoconductance and multi-frequency infrared detective properties were be decided. Infrared detective size effects of nanoribbons with different thickness or nanocable with different diameter were be explored. Thus, we will understand the relationship of between the microstructure, composition, spectra of CdSRE nanoribbons（nanocables and nanoribbon lateral heterostructures） and their infrared detective properties. The infrared detective mechanism of CdSRE nanomaterials and their hybrid structures were be explained by combination of theoretic results and the effects of doping、strain、absorbed layer of organic perovskite materials、and the surface plasmon resonances in the metallic gold nanoparticles on photoelectronic detectors. It is possible to obtain multiple-frequency & uncooled infrared detectors high response, photodetectivity & high external quantum efficiency, which can compare with three-frequency light detector of InGaAs designed through our project. Moreover, this project will provide valuable study results on preparation of new multiple-frequency & uncooled infrared detective materials and devices.