ACS Applied Materials & Interfaces
ACS Applied Materials & Interfaces
5 years ago

Poly(3,4-ethylenedioxythiophene)–Poly(styrenesulfonate) Interlayer Insertion Enables Organic Quaternary Memory

Poly(3,4-ethylenedioxythiophene)–Poly(styrenesulfonate) Interlayer Insertion Enables Organic Quaternary Memory
Xue-Feng Cheng, Jian-Mei Lu, Hua Li, Qing-Feng Xu, Dong-Yun Chen, Na-Jun Li, Jing-Hui He, Xiang Hou, Wen-Hu Qian
Herein, for the first time, quaternary resistive memory based on an organic molecule is achieved via surface engineering. A layer of poly(3,4-ethylenedioxythiophene)–poly(styrenesulfonate) (PEDOT–PSS) was inserted between the indium tin oxide (ITO) electrode and the organic layer (squaraine, SA-Bu) to form an ITO/PEDOT–PSS/SA-Bu/Al architecture. The modified resistive random-access memory (RRAM) devices achieve quaternary memory switching with the highest yield (∼41%) to date. Surface morphology, crystallinity, and mosaicity of the deposited organic grains are greatly improved after insertion of a PEDOT–PSS interlayer, which provides better contacts at the grain boundaries as well as the electrode/active layer interface. The PEDOT–PSS interlayer also reduces the hole injection barrier from the electrode to the active layer. Thus, the threshold voltage of each switching is greatly reduced, allowing for more quaternary switching in a certain voltage window. Our results provide a simple yet powerful strategy as an alternative to molecular design to achieve organic quaternary resistive memory.

Publisher URL: http://dx.doi.org/10.1021/acsami.7b06810

DOI: 10.1021/acsami.7b06810

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.