Jiang Weitao, Zhao Tingting, Liu Hongzhong, Jia Rui, Niu Dong, Chen Bangdao, Shi Yongsheng, Yin Lei, Lu Bingheng
State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University Xi'an 710049 China
Department of Neurology, First Affiliated Hospital of Xi'an Jiaotong University Xi'an 710061 China.
RSC Adv. 2018 Apr 23;8(27):15134-15140. doi: 10.1039/c8ra00491a. eCollection 2018 Apr 18.
Implantable devices are promising electronics in medicine, which can perform real-time monitoring for a variety of human-body physiological conditions and control the function of some failing organs. However, the technology to power implantable devices still has some remaining challenges. This work presents a transparent self-powered pyroelectric generator driven by near infrared radiation for wireless powering of electronics. The pyroelectric device uses a highly conductive polymer, PEDOT:PSS, formed as an electrode without the use of a complex transferring process. Due to the good match between the surface energy of the PEDOT electrode and PVDF, when combined with PVDF the resulting PEDOT/PVDF/PEDOT device possesses a highly adherent interface. The influence of the PEDOT thickness on the output voltage of the device has been investigated according to the difference in its infrared transmittance and absorbance. In addition, in order to enhance the output voltage while reducing the device temperature, a laminated pyroelectric generator, in which each cell is composed of a PEDOT/PVDF/PEDOT sandwich, was further developed taking advantage of the high infrared transmittance of PEDOT and PVDF. The proposed laminated pyroelectric device could generate up to 23.4 V with six laminated cells, an enhancement of approximately 212% compared to a single cell, which could directly light up an LCD and was applied for nerve stimulation of the sciatic nerve of a frog, indicating that the proposed self-powered device could be a candidate for implantable medical electronics.
可植入设备是医学领域中很有前景的电子器件，它可以对多种人体生理状况进行实时监测，并控制一些衰竭器官的功能。然而，为可植入设备供电的技术仍然存在一些挑战。这项工作展示了一种由近红外辐射驱动的透明自供电热释电发电机，用于为电子设备进行无线供电。该热释电装置使用一种高导电聚合物聚（3,4-乙撑二氧噻吩）：聚苯乙烯磺酸盐（PEDOT:PSS）形成电极，无需复杂的转移工艺。由于PEDOT电极的表面能与聚偏氟乙烯（PVDF）之间的良好匹配，当与PVDF结合时，所得的PEDOT/PVDF/PEDOT器件具有高度粘附的界面。根据PEDOT厚度在红外透过率和吸收率方面的差异，研究了其对器件输出电压的影响。此外，为了在降低器件温度的同时提高输出电压，利用PEDOT和PVDF的高红外透过率，进一步开发了一种层压热释电发电机，其中每个单元由一个PEDOT/PVDF/PEDOT夹层组成。所提出的层压热释电装置由六个层压单元可产生高达23.4 V的电压，与单个单元相比提高了约212%，该装置可直接点亮一个液晶显示器，并应用于青蛙坐骨神经的神经刺激，这表明所提出的自供电装置可能成为可植入医疗电子设备的候选者。
