High-frequency polymer diode rectifiers for flexible wireless power-transmission sheets
Journal
Organic Electronics
Journal Volume
12
Journal Issue
11
Pages
1777-1782
Date Issued
2011-11
Author(s)
Chang-Yu Lin
Chih-Hung Tsai
Heng-Tien Lin
Yung-Hui Yeh
Zingway Pei
Yi-Jen Chan
Li-Chi Chang
Chang-Sheng Chen
Abstract
In this work, we successfully implemented flexible high-frequency rectifying diodes on polycarbonate substrates using the polythiophene-based semiconducting polymers. We show that the appropriate conductivity of the intermediate hole-injection layer PEDOT:PSS between the anode and the semiconducting polymer is critical to simultaneously achieve enhanced forward currents and rectification ratios. Among the semiconducting polymers studied (P3HT and PQT-12), the diodes based on carefully purified PQT-12 exhibited higher forward currents, higher rectification ratios, much better environmental stability, and much higher operation frequencies. A forward current density up to ∼6 A/cm2 at 5 V, a rectification ratio up to 2 × 10 4 at ±5 V, and an operation frequency of the diode rectifier over 14 MHz were achieved with the PQT-12 rectifying diodes. To demonstrate the use of the high-speed polymer rectifying diodes in wireless power transmission, we integrate the polymer-based vertical Schottky diode rectifier, printed antenna and capacitors on plastic substrates to demonstrate a flexible wireless power-transmission sheet that can convert a 13.56 MHz electromagnetic wave into the dc power to drive load devices. © 2011 Published by Elsevier B.V. All rights reserved.
Type
journal article