【摘要】 用高温扩散方法制备出补偿Si∶(B,Mn)材料,并研究了这种材料的电流振荡参数与光照和电场之间的关系.结果表明在一定光照和电场范围内(276~305V/cm),电阻率为104Ω.cm的材料在液氮温度下显示出电流振荡特性;在一定的电场下,电流振荡波形是固定的,不随时间变化;振荡频率随光照强度的增大而线性增大;调制系数随着光强的增强而减弱;振荡的最大值随着光照强度增大而减小,最小值随着光强增大而缓慢增大.更多还原

【Abstract】 Compensated material Si∶（B,Mn） is prepared by high temperature diffusion.The relation between the current oscillation parameters of this material and light intensity and electric field is studied.The experiment shows that:（1） In certain light intensity and electric field ranges （145～305V/cm） the material Si∶（B,Mn） with a resistivity of 104Ω·cm exhibits a current oscillation phenomenon at liquid nitrogen temperature;（2） At a certain electric field,the waveform of the current oscillation is stable and does not change with time;（3） The dependence relation between the oscillation frequency and light-intensity can be expressed by f=f₀（L/L₀）α where L₀ is the minimum light-intensity needed to stimulate oscillation,f₀ is the frequency under L₀,L is the intensity of the light,and α is a coefficient that increase with electric field;（4） The modulating coefficient K（K=（I max -I min ）/I max ） decreases as the light increases;（5） The maximum value of the oscillation I max decreases with the increase of the light-intensity while the minimum value of oscillation I min increases slowly.更多还原