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Researchers from Ajou University Report Findings in Quantum Dots (Enhancement of memory margins for stable organic bistable devices based on...

July 11, 2014



Researchers from Ajou University Report Findings in Quantum Dots (Enhancement of memory margins for stable organic bistable devices based on graphene-oxide layers due to embedded CuInS2 quantum dots)

By a News Reporter-Staff News Editor at Science Letter -- New research on Quantum Dots is the subject of a report. According to news reporting originating from Suwon, South Korea, by NewsRx correspondents, research stated, "Current-voltage (I-V) curves for Al/CuInS2 (CIS) quantum dots (QDs) embedded in graphene-oxide layer/indium-tin-oxide devices at 300 K showed a current bistability with a maximum high conductivity (ON)/low conductivity (OFF) ratio of 1 x 10(4), which was 100 times larger than the ON/OFF ratio of the device without CIS QDs. I-V curves and write-read-erase-read voltage cycles demonstrated the rewritable nonvolatile memory properties of the organic bistable devices (OBDs) with ON and OFF current states at the same voltage."

Our news editors obtained a quote from the research from Ajou University, "The retention time was above 1 x 10(5) s, indicative of the memory stability of the OBDs. I-V curve at lower voltages up to 0.05 V was attributed to the thermionic emission mechanism, and the curve in the applied voltage range from 0.06 to 0.17 V was related to an ohmic mechanism."

According to the news editors, the research concluded: "The I-V characteristics in the applied voltage above 0.18 V dominantly followed the space-charge-limited-current behaviors."

For more information on this research see: Enhancement of memory margins for stable organic bistable devices based on graphene-oxide layers due to embedded CuInS2 quantum dots. Carbon, 2014;75():244-248. Carbon can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England. (Elsevier - www.elsevier.com; Carbon - www.elsevier.com/wps/product/cws_home/258)

The news editors report that additional information may be obtained by contacting D.Y. Yun, Ajou University, Dept. of Mol Sci & Technol, Suwon 443749, South Korea. Additional authors for this research include H.M. Park, S.W. Kim, S.W. Kim and T.W. Kim (see also Quantum Dots).

Keywords for this news article include: Asia, Suwon, South Korea, Quantum Dots, Nanotechnology, Quantum Physics, Emerging Technologies

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Science Letter


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