Space-charge-limited current in DNA-surfactant complex

I-Ching Chen; Ting-Yu Lin; Yu-Chueh Hung

doi:10.1117/12.2001751

6 March 2013 Space-charge-limited current in DNA-surfactant complex

I-Ching Chen, Ting-Yu Lin, Yu-Chueh Hung

Proceedings Volume 8622, Organic Photonic Materials and Devices XV; 86220P (2013) https://doi.org/10.1117/12.2001751
Event: SPIE OPTO, 2013, San Francisco, California, United States

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.

Citation Download Citation

I-Ching Chen, Ting-Yu Lin, and Yu-Chueh Hung "Space-charge-limited current in DNA-surfactant complex", Proc. SPIE 8622, Organic Photonic Materials and Devices XV, 86220P (6 March 2013); https://doi.org/10.1117/12.2001751

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