Charge‐Storage Aromatic Amino Compounds for Nonvolatile Organic Transistor Memory Devices. Issue 25 (27th May 2018)

• Record Type: Journal Article
• Authors: Zheng, Chaoyue; Tong, Tong; Hu, Yueming; Gu, Yuming; Wu, Huarui; Wu, Dequn; Meng, Hong; Yi, Mingdong; Ma, Jing; Gao, Deqing; Huang, Wei
• Is Part Of: Small. Volume 14:Issue 25(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-05-27
• Subjects: aggregate -- aromatic amino -- charge storage -- nonvolatile organic transistor memory -- self‐assembly; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.201800756
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract: Here, charge‐storage nonvolatile organic field‐effect transistor (OFET) memory devices based on interfacial self‐assembled molecules are proposed. The functional molecules contain various aromatic amino moieties ( N ‐phenyl‐ N ‐pyridyl amino‐ (PyPN), N ‐phenyl amino‐ (PN), and N, N ‐diphenyl amino‐ (DPN)) which are linked by a propyl chain to a triethoxysilyl anchor group and act as the interface modifiers and the charge‐storage elements. The PyPN‐containing pentacene‐based memory device (denoted as PyPN device) presents the memory window of 48.43 V, while PN and DPN devices show the memory windows of 24.88 and 8.34 V, respectively. The memory characteristic of the PyPN device can remain stable along with 150 continuous write‐read‐erase‐read cycles. The morphology analysis confirms that three interfacial layers show aggregation due to the N atomic self‐catalysis and hydrogen bonding effects. The large aggregate‐covered PyPN layer has the full contact area with the pentacene molecules, leading to the high memory performance. In addition, the energy level matching between PyPN molecules and pentacene creates the smallest tunneling barrier and facilitates the injection of the hole carriers from pentacene to the PyPN layer. The experimental memory characteristics are well in agreement with the computational calculation. Abstract : A series of charge‐storage aromatic amino compounds are presented and their elaborate aggregate‐covered self‐assembled layers are utilized as the charge‐storage layers in the pentacene‐based nonvolatile organic field‐effect transistor memory devices. A high performance with memory window of 48.43 V and high stability with 150 continuous write‐read‐erase‐read cycles are ascribed to the high contact area and well‐matching energy level.