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논문 기본 정보

자료유형
학술저널
저자정보
Sae-Wan Kim (Kyungpook National University) In-Su Jung (Kyungpook National University) Byoung-Ho Kang (SINOKOR) Jin-Beom Kwon (Kyungpook National University) Jae-Sung Lee (Kyungpook National University) Sang-Won Lee (Kyungpook National University) Ok-Sik Kim (Kyungpook National University) Ju-Seong Kim (Kyungpook National University) Jin-Hyuk Bae (Kyungpook National University) Shin-Won Kang (경북대학교)
저널정보
대한전자공학회 JOURNAL OF SEMICONDUCTOR TECHNOLOGY AND SCIENCE Journal of Semiconductor Technology and Science Vol.18 No.2
발행연도
2018.4
수록면
180 - 186 (7page)
DOI
10.5573/JSTS.2018.18.2.180

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초록· 키워드

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In this study, we propose an organic memory device using CdSe/ZnS quantum dots (QDs) and a pentacene blending solution as a charge storage layer with a one-step process. The QDs were localized without any tunneling insulators and were used as hole-trapping sites. Moreover, the QDs and pentacene blending solution formed a type II junction, assisting in the facilitation of energy band bending. The band bending inhibited the back-injection of the holes trapped in the CdSe (core of QDs) into an electrode, thereby developing a hysteretic I-V response during device operation. The synthesized QDs had a photoluminance peak at 535 nm (Green QDs). The fabricated memory device had a structure of <ITO/PVP /CdSe-ZnS QDs @pentacene/Al> and exhibited current differences (approximately 300 times the ON/OFF ratio) at 0.5 V. The device was fabricated using the spin-coating method. The write voltage was approximately 2.5 V. The erasing process was performed by applying a voltage of approximately −4V. In addition, the stored charge retained its initial value even after 150 h and the write voltage was maintained after 200 write/erase cycles; the long retention time and high durability will be advantageous for future applications of nonvolatile memory.

목차

Abstract
I. INTRODUCTION
II. EXPERIMENTAL DETAILS
III. RESULTS AND DISCUSSION
IV. CONCLUSIONS
REFERENCES

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