Acta Chimica Sinica ›› 2023, Vol. 81 ›› Issue (11): 1508-1514.DOI: 10.6023/A23060267 Previous Articles     Next Articles

Article

基于H型芴基小分子的双极性有机场效应晶体管存储器

刘玉玉a,b, 陈捷锋a, 邵振a, 魏颖a,*(), 凌海峰a,*(), 解令海a,*()   

  1. a 南京邮电大学材料科学与工程学院 有机电子与信息显示国家重点实验室 南京 210023
    b 南京工业职业技术大学电气工程学院 南京 210023
  • 投稿日期:2023-06-02 发布日期:2023-07-26
  • 基金资助:
    国家重点研发计划青年项目(2021YFA0717900); 国家自然科学基金(22275098); 国家自然科学基金(22071112); 国家留学基金(201908320064); 南京工业职业技术大学(YK21-02-07)

Ambipolar Organic Field Effect Transistor Memory Based on H-Type Fluorene-Based Small Molecule

Yuyu Liua,b, Jiefeng Chena, Zhen Shaoa, Ying Weia(), Haifeng Linga(), Linghai Xiea()   

  1. a State Key Laboratory of Organic Electronics and Information Displays, College of Materials Science and Engineering, Nanjing University of Posts & Telecommunications (NUPT), Nanjing 210023
    b College of Electrical Engineering, Nanjing Vocational University of Industry Technology, Nanjing 210023
  • Received:2023-06-02 Published:2023-07-26
  • Contact: *E-mail: iamywei@njupt.edu.cn; iamhfling@njupt.edu.cn; iamlhxie@njupt.edu.cn
  • Supported by:
    National Key R&D Program Youth Project(2021YFA0717900); National Natural Science Foundation of China(22275098); National Natural Science Foundation of China(22071112); State Scholarship Fund(201908320064); Nanjing Vocational University of Industry Technology(YK21-02-07)

A small organic molecule 3Ph-TrH with a rigid structure was designed with π-bridge thienyl and fluorenyl groups as hole trapping sites and the fluorenyl and phenyl units as electron trapping sites according to steric hindrance. Then, the floating gate type organic field-effect transistor (OFET) memories based on this small organic molecule through solution processing were fabricated. The experimental results show that there is a hole storage window of 31.2 V and an electron storage window of 11.6 V in this device, exhibiting ambipolar charge storage based on a single small molecule material. To improve the stability of the device, a floating-gate OFET memory based on 3Ph-TrH with polystyrene (PS)-doped film was further prepared. The test results show that the device is equipped with better device stability and tolerance than those based on 3Ph-TrH as a single-component charge trapping layer. After 10000 s of retention times test, ON/OFF current ratio of the device can still be maintained at 1.1×103, only reduced by an order of magnitude. This work can provide an idea for the preparation of a new type of OFET memory with ambipolar storage.

Key words: steric hindrance, fluorene-based small molecule material, charge trapping layer, ambipolar charge storage, floating gate type organic field-effect transistor (OFET) memory