There are some creations in this paper . first , the relationship among the physical property , crystal structure , preparation method and doping content is established to be a parabola equation . the extreme value of this equation determines the optimum doping content 本论文工作的创新点在于：从半导体发光材料的晶体结构出发，建立起材料的物理性能、晶体结构中原子配位数、最佳掺杂含量和制备方法之间的关系，归纳出材料掺杂的最佳掺杂含量的理论表达式。
Results obtained by different electrochemical measurements show that the amounts of co in samples have great influence on their electrochemical capacities . while measured co was doped , the electrode has better capacity property , lower impedance and higher utilization , and can be charge - discharged at high current of 40ma 电化学测试结果得出化学掺杂的配比对电化学性能影响很大，适量掺杂的mno _ 2电极比未掺杂的mno _ 2电极具有更好的循环性能和电容性能。
Our results explain the mechanisms of the composition and doping dependent thz radiation efficiency for the different crystals . experimental results in this thesis are useful for growing eo crystals with high performance , and suggest that more parameters are required for better characterization of this kind of crystals as thz wave emitters . the main results and conclusions are listed as follows : 1 ) experimental measurements with low cd composition zn1 - xcdxte < 110 > crystals ( 0 < x < 0 . 25 ) as thz emitters indicate the optimum composition of x = 0 . 05 在国际上，我们首次用实验研究了不同组分、不同掺杂的zn _ ( 1 - x ) cd _ xte < 110 >单晶( x = 0 0 . 25 )对thz辐射的吸收情况和它们产生thz辐射的相位匹配情况，并首次从晶体对thz辐射的吸收和晶体的相位匹配角度解释了这些晶体产生thz辐射效率不同的原因。
This effect was gradually decreased with the increase of snte content in the pseudo - binary alloys as well as the increase of temperature , which is considered to be caused by the change of scattering mechanism , the saturation of carrier concentration as well as the ag atoms occupying the 随着膺ti合金rfsnte含量和测试温度的上升， ag掺杂的作用逐渐降低，胸二儿合金的性能逐渐恶化。其原因被认为是由于散射机制的改变、载流子浓度趋于饱和以及ag作为间隙原一了提供额外施主。
In this thesis , we study the thz pulse generation efficiency of the < 110 > - oriented zn1 - xcdxte crystals with various composition ratios and doping levels , using thz time - domain spectroscopy . it is found that both absorption and phase matching condition play important role . it is the first time to systematically study < 110 > - oriented zn1 - xcdxte crystals with various composition ratios and different doping levels using thz time - domain spectroscopy 本论文中，我们利用thz时域光谱系统对不同组分、不同掺杂的zn _ ( 1 - x ) cd _ xte < 110 >单晶( x = 0 0 . 25 )作为thz辐射材料的性能和光谱响应进行了研究，发现晶体对thz辐射的吸收和晶体的相位匹配是影响晶体产生thz辐射效率的重要因素。
