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Electromechanical Fields Near a Circular PN Junction Between Two Piezoelectric Semiconductors 被引量:8
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作者 yixun luo Ruoran Cheng +2 位作者 Chunli Zhang Weiqiu Chen Jiashi Yang 《Acta Mechanica Solida Sinica》 SCIE EI CSCD 2018年第2期127-140,共14页
We study electromechanical fields near the interface between a circular piezoelectric semiconductor cylinder and another piezoelectric semiconductor in which it is embedded. The cylinder is p-doped. The surrounding ma... We study electromechanical fields near the interface between a circular piezoelectric semiconductor cylinder and another piezoelectric semiconductor in which it is embedded. The cylinder is p-doped. The surrounding material is n-doped. The phenomenological theory of piezoelectric semiconductors consisting of the equations of piezoelectricity and the conservation of charge for holes and electrons is used. The theory is linearized for small carrier concentration perturbations. An analytical solution is obtained, showing the formation of a PN junction near the interface. Various electromechanical fields associated with the junction are calculated. The effects of a few physical parameters are examined. 展开更多
关键词 Piezoelectric semiconductors CYLINDER Carriers PN junction Electromechanical coupling
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层状压电半导体板的稳态弯曲振动分析
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作者 罗逸璕 程若然 张春利 《固体力学学报》 CAS CSCD 北大核心 2020年第1期15-29,共15页
论文针对具有变形-极化-载流子耦合的层状压电半导体复合悬臂结构,理论研究了其自由端在周期荷载作用下的稳态响应问题,导出了板中位移、电场、载流子等物理量的解析表达式,并数值分析了周期荷载的幅值、激励频率和初始载流子浓度对结... 论文针对具有变形-极化-载流子耦合的层状压电半导体复合悬臂结构,理论研究了其自由端在周期荷载作用下的稳态响应问题,导出了板中位移、电场、载流子等物理量的解析表达式,并数值分析了周期荷载的幅值、激励频率和初始载流子浓度对结构宏观力学响应的影响.数值结果表明:在一阶固有频率下,结构内部各物理量响应幅值较大;在高阶固有频率下,各物理量响应出现多个局部峰值区域,其幅值相对减小,载流子会朝局部极值区域"聚集"或"离开"局部极值区域.初始载流子浓度在一定范围内对结构各物理量(如固有频率和电势)的稳态响应有显著的调控作用. 展开更多
关键词 压电半导体 多场耦合 弯曲振动 层状板 载流子
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