为实现有机光电探测器对三基色（红、绿、蓝）的全响应以及器件性能的改善，研究了在P3HT∶PCBM活性层中，掺入非富勒烯受体ITIC实现光谱拓宽以及通过改善迁移率的平衡性和活性层表面形态，进而改善探测器性能的方法，着重研究了ITIC受体含量对探测器光电学性能的影响。在此基础上，获得了一个覆盖400~800 nm波长范围的三基色探测器，并且在低偏压-1.5 V下三基色（波长为630、530和460 nm）的外量子效率EQE和比探测率D^*分别达到了56%、68%、52%和1.17×10¹² Jones、1.4×10¹² Jones、1.2×10¹² Jones。结果表明：在P3HT：PC₆₁BM中混入适量的ITIC，不仅可将光谱拓宽到400~800 nm，改善器件的光学特性，而且还可以提高激子解离率和载流子收集率，降低混合薄膜中的双分子复合，使器件电学特性得到了明显改善。本文研究为研发宽光谱高探测率三基色有机光电探测器提供了一种新思路。

Convenient, rapid, and accurate detection of cardiac troponin I (cTnI) is crucial in early diagnosis of acute myocardial infarction (AMI). A paper-based electrochemical immunosensor is a promising choice in this field, because of the flexibility, porosity, and cost-efficacy of the paper. However, paper is poor in electronic conductivity and surface functionality. Herein, we report a paper-based electrochemical immunosensor for the label-free detection of cTnI with the working electrode modified by MXene (Ti₃C₂) nanosheets. In order to immobilize the bio-receptor (anti-cTnI) on the MXene-modified working electrode, the MXene nanosheets were functionalized by aminosilane, and the functionalized MXene was immobilized onto the surface of the working electrode through Nafion. The large surface area of the MXene nanosheets facilitates the immobilization of antibodies, and the excellent conductivity facilitates the electron transfer between the electrochemical species and the underlying electrode surface. As a result, the paper-based immunosensor could detect cTnI within a wide range of 5–100 ng/mL with a detection limit of 0.58 ng/mL. The immunosensor also shows outstanding selectivity and good repeatability. Our MXene-modified paper-based electrochemical immunosensor enables fast and sensitive detection of cTnI, which may be used in real-time and cost-efficient monitoring of AMI diseases in clinics.

偏振是激光通信中保密编码的重要参数，研究斜程湍流大气中的偏振特性对激光通信具有重要意义。利用广义惠更斯-菲涅尔原理和偏振-相干统一理论，推导了无衍射的部分相干艾里高斯光束在斜程湍流大气传输中的偏振度解析式，详细研究了湍流参数、相干长度、天顶角、截断因子和分布因子对偏振度的影响。研究结果表明：与水平湍流相比，光束在斜程湍流下恢复到初始偏振需要更长的传输距离。天顶角、接收高度、截断因子、分布因子越大和相干长度越小，光束偏振度峰值也越大。高相干性的高斯光束比艾里光束更易于保持偏振度不变。无衍射艾里光束中选取合适的光学参数更有利于信息传输与编码，本文结果对激光大气通信领域有着潜在的应用价值。