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Proceedings Paper

Space-charge-limited current in DNA-surfactant complex
Author(s): I-Ching Chen; Ting-Yu Lin; Yu-Chueh Hung
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Paper Abstract

In recent years, deoxyribonucleic acid (DNA) biopolymers have attracted much research attention and been considered as a promising material when being employed in many optoelectronic devices. Since performance of many DNA biopolymer-based devices relies on carrier transport, it is crucial to study the carrier mobility of these DNA-surfactant complexes for practical implement. In this work, we present hole mobility characterization of cetyltrimethylammonium (CTMA)-modified DNA biopolymer by using space-charge-limited current (SCLC) method. Devices were fabricated using a sandwich structure with a buffer layer of MoO3 to enhance hole injection and achieve ohmic contact between the anode and the DNA layer. Current-voltage (I-V) curves of the devices were analyzed. A trap-free SCLC behavior can ultimately be achieved and a quadratic dependence in I-V curve was observed. With increasing electric field, a positive field-dependent mobility was demonstrated. The correlation between mobility and temperature was also investigated and a positive relation was found. The characterization results can be further utilized for DNA-based device design and applications.

Paper Details

Date Published: 6 March 2013
PDF: 6 pages
Proc. SPIE 8622, Organic Photonic Materials and Devices XV, 86220P (6 March 2013); doi: 10.1117/12.2001751
Show Author Affiliations
I-Ching Chen, National Tsing Hua Univ. (Taiwan)
Ting-Yu Lin, National Tsing Hua Univ. (Taiwan)
Yu-Chueh Hung, National Tsing Hua Univ. (Taiwan)

Published in SPIE Proceedings Vol. 8622:
Organic Photonic Materials and Devices XV
Christopher E. Tabor; François Kajzar; Toshikuni Kaino; Yasuhiro Koike, Editor(s)

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