报告题目：

1、自驱动电子医疗器件

李舟研究员（中国科学院北京纳米能源与系统研究所）

2、Design and stimulated emission performance of organic optical microcavity

刘星元研究员（中国科学院长春光学精密机械与物理研究所，发光学与应用国家重点实验室）

时间：4月17日（周二）下午2:30

地点：生物电子国家重点实验室会议室

主要内容：   

1、自驱动电子医疗器件

 纳米发电机因其可从环境和人体运动中获得机械能，电输出性能优异、生物相容性好，已引起广泛关注，我们课题组在纳米发电机用于植入式自驱动电子医疗器件方面开展了研究工作。通过纳米发电机在体内进行生物机械能的收集，可给植入式电子医疗器件，如心脏起搏器、无线传感器和激光治疗系统供能，可控制大鼠的心率、无线监测心脏功能，也能明显加快成骨细胞的增殖和分化。同时，我们研究了可使摩擦纳米发电机不受污染和液体侵蚀的封装方法，通过多层复合封装实现自驱动电子医疗器件的柔性防水。此外，我们设计了即插即用的柔性可植入自充电系统，可与现有的电子医疗器件结合。目前，我们已经实现：一次心跳，转化一次心脏起搏器电脉冲的能量，纳米发电机的体内输出功率和转化效率明显提升。纳米发电机转化体内生物机械能，对构建自供能可植入医疗电子器件将发挥重要意义。

 2、Design and stimulated emission performance of organic optical microcavity    

 Electrically pumped Organic semiconductor laser diodes (OSLDs) are rather difficult to realize because the expected high threshold current is hard to reach in low electrical conductivity organic semiconductors and electroluminescence (EL) efficiency is much decreased under high current. Herein, based on high-Q microcavity OSLD, we present an electrically pumped vertical-cavity organic semiconductor optical amplifier and its light gain amplification phenomenon. Moreover, we demonstrate that electrically pumped quasi-continuous-wave lasing can be obtained with a much lower threshold current density of the level at mA/cm2. At the allowed cavity modes, greatly increased photon density and internal quantum efficiency of devices lead to increased probability of stimulated emission in four-level organic materials, and consequently facilitate population inversion in OSLDs with a low current density.