PEDOT as a Flexible Organic Electrode for a Thin Film Acoustic Energy Harvester

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• 作者：Younghoon Kim ; Jongbeom Na ; Chihyun Park ; Haijin Shin ; Eunkyoung Kim
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：August 5, 2015
• 年：2015
• 卷：7
• 期：30
• 页码：16279-16286
• 全文大小：526K
• ISSN：1944-8252

文摘

An efficient thin film acoustic energy harvester was explored using flexible poly(3,4-ethylene dioxythiophene) (PEDOT) films as electrodes in an all-organic triboelectric generator (AO-TEG). A thin film AO-TEG structured as PEDOT/Kapton//PET/PEDOT was prepared by the solution casting polymerization(SCP) on the dielectric polymer films. As-prepared AO-TEG showed high flexibility and durability due to the strong adhesion between the electrodes and the dielectric polymer. The short-circuit current density (J_sc), open-circuit voltage (V_oc), and maximum power density (Pw) reached 50 mA/m², 700 V, and 12.9 W/m² respectively. The output current density decreased with the increase in the electrode resistance (R_e), but the energy loss in the organic electrodes was negligible. The AO-TEG could light up 180 LEDs instantaneously upon touching of the AO-TEG with a palm (鈭?20 N). With the flexible structure, the AO-TEG was worn as clothes and generated electricity to light LEDs upon regular human movement. Furthermore, the AO-TEG was applicable as a thin film acoustic energy harvester, which used music to generate electricity enough for powering of 5 LEDs. An AO-TEG with a PEDOT electrode (R_e = 200 惟) showed instantaneous peak-to-peak voltage generation of 11 V under a sound pressure level (SPL) of 90鈥?00 dB. The harvested acoustic energy through the AO-TEG was 350 渭J from the 4 min playing of the same single song. This is the first demonstration of a flexible triboelectric generator (TEG) using an organic electrode for harvesting acoustic energy from ambient environment.