Conference Program - LOPE-C 2011
Conference Program - LOPE-C 2011
Conference Program - LOPE-C 2011
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SCIENTIFIC CONF. | THURSDAY-JUNE 30, <strong>2011</strong><br />
Track 4<br />
Systems and Implementation Issues (02:30 pm - 04:00 pm) | LOCATION HARMONIE D / LEVEL C2<br />
03:20 pm Charge Pump Circuit Using Printed Organic Diodes and Capacitors<br />
Mr Petri Heljo,<br />
Tampere University of Technology, Research Scientist, Finland<br />
The development of organic electronic components and circuits offers the possibility to manufacture flexible and lightweight electronics using cost-effective processes.<br />
However, useful circuits require printing of more than one kind of device using compatible processes. Previously, we have demonstrated diodes with high rectification<br />
ratios, low reverse currents and small threshold voltages that work as rectifiers at MHz frequencies fabricated using only air-stable materials and processes that are<br />
scalable to high volume production [1]. Here we report gravure printed organic diodes and capacitors and their application in an organic voltage multiplier circuit.<br />
In 13.56 MHz RFID applications the voltage supplied by the antenna is limited, which creates a need to generate DC voltages higher than the AC signal amplitude in order<br />
to power circuitry. Printed 13.56 MHz voltage multipliers have been demonstrated using oxygen sensitive aluminium cathode inks and a semiconductor employing inorganic<br />
ZnO nanowires [2]. Organic voltage multipliers have been demonstrated at kHz frequencies [3]. However, the output voltage of the circuit was limited due to high threshold<br />
voltage and low rectification ratio of the diodes. Here, we demonstrate a voltage multiplier based on printed, air stable organic diodes. Furthermore, we demonstrate printed<br />
capacitors with a capacitance of 2 nF/cm2. A simple voltage doubler circuit delivers a DC output voltage of 1.5 times the output voltage of a half-wave rectifier, which<br />
exceeds the AC input signal amplitude.<br />
References:<br />
[1] K. E. Lilja, T. G. Bäcklund, D. Lupo, T. Hassinen, T. Joutsenoja, Org. Electr. 10 (2009) 1011.<br />
[2] M. Jung, J. Kim, J. Noh, N. Lim, C. Lim, G. Lee, J. Kim, H. Kang, K. Jung, A. D. Leonard, J. M. Tour, G. Cho, IEEE Trans. Electron Devices. 57 (2010) 571.<br />
[3] S. Mutlu, I. Haydaroglu, A. O. Sevim, Org. Electr. 12 (<strong>2011</strong>) 312.<br />
page 93
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