Thermally Stable Ternary Data-Storage Device Based on Twisted Anthraquinone Molecular Design
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- 作者：Yuhui Zhang ; Hao Zhuang ; Yong Yang ; Xufeng Xu ; Qing Bao ; Najun Li ; Hua Li ; Qingfeng Xu ; Jianmei Lu ; Lihua Wang
- 刊名：The Journal of Physical Chemistry C
- 出版年：2012
- 出版时间：November 1, 2012
- 年：2012
- 卷：116
- 期：43
- 页码：22832-22839
- 全文大小：523K
- 年卷期：v.116,no.43(November 1, 2012)
- ISSN：1932-7455
文摘
Three donor鈥揳cceptor and twisted anthraquinone azo molecules were synthesized, and the effects of conjugated backbones length, alkyl chains length, and the thermal annealing temperature on the memory characteristics were explored. The device based on Azo-02, which has longer conjugated backbone and alkyl chains, exhibited stable nonvolatile ternary memory behavior as the thermal annealing temperature increased, with basically the same switching threshold voltages and current ratios being 1:103.43:105.50. For the 鈥渃ounterpart鈥?molecules (Azo-01 and Azo-03) film, defects appeared or disordered, crystal packing formed as the thermal annealing temperature increased, and the corresponding devices exhibited no obvious conductance switching behaviors. The mechanism related to electrical switching properties and WORM (write-once-read-many-times) behaviors were elucidated through molecular simulation. The results demonstrated that the long-term thermally stable high-density data-storage devices can be fabricated by adjusting the structures of twisted molecules.