Research Article


2022, 15(1): 386–394


Flexible multi-level quasi-volatile memory based on organic vertical transistor

Huihuang Yang1,2,§, Qian Yang1,2,3,§, Lihua He1, Xiaomin Wu1, Changsong Gao1, Xianghong Zhang1, Liuting Shan1, Huipeng Chen1,2 (✉), and Tailiang Guo1,2

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1 Institute of Optoelectronic Display, National & Local United Engineering Lab of Flat Panel Display Technology, Fuzhou University, Fuzhou 350002, China
2 Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350100, China
3 Zhicheng College, Fuzhou University, Fuzhou 350002, China
§ Huihuang Yang and Qian Yang contributed equally to this work.

Keywords: vertical transistor, organic transistor memory, perovskite quantum dot, quasi-volatile memory, storage wall
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  • Abstract
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Driven by important megatrends such as cloud computing, artificial intelligence, and the Internet of Things, as a device used to store programs and data in computing systems, memory is struggling to catch up with the explosive growth of data and bandwidth requirements in the system. However, the “storage wall” between non-volatile memory and volatile memory retards the further improvement of modern memory computing systems. Herein, a quasi-volatile transistor memory based on organic polymer/perovskite quantum dot blend was fabricated using the vertical transistor configuration. Contributing to vertical structure and appropriate doping ratio of blend film, the quasi-volatile memory device displayed 1,560 times longer data retention time (> 100 s) with respect to the dynamic random access memory and fast data programming speed (20 μs) in which was far more quickly than that of other organic non-volatile memories to fill the gap between volatile and non-volatile memories. Moreover, the device retention characteristics could be further promoted under the photoelectric synergistic stimulation, which also provided the possibility to reduce electric writing condition. Furthermore, the quasi-volatile memory device showed good electrical performance under bending conditions. This work provides a simple solution to fabricate multi-level quasi-volatile memory, which opens up a whole new avenue of “universal memory” and lays a solid foundation for low power and flexible random access memory devices.
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Flexible multi-level quasi-volatile memory based on organic vertical transistor. Nano Res. 2022, 15(1): 386–394

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