Covalent Functionalization of Black Phosphorus with Conjugated Polymer for Information Storage

Yaming Cao; Xiangyu Tian; Junwei Gu; Bo Liu; Bin Zhang; Sannian Song; Fei Fan; Yu Chen

doi:10.1002/anie.201712675

Covalent Functionalization of Black Phosphorus with Conjugated Polymer for Information Storage

Angew Chem Int Ed Engl. 2018 Apr 16;57(17):4543-4548. doi: 10.1002/anie.201712675. Epub 2018 Mar 25.

Authors

Yaming Cao¹, Xiangyu Tian¹, Junwei Gu², Bo Liu^{3

4}, Bin Zhang¹, Sannian Song⁴, Fei Fan¹, Yu Chen¹

Affiliations

¹ Key Laboratory for Advanced Materials, Institute of Applied Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China.
² Shaanxi Key Laboratory of Macromolecular Science and Technology, Department of Applied Chemistry, School of Science, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China.
³ School of Chemistry, Biology and Materials Engineering, Suzhou University of Science and Technology, No 1 Kerui Road, Suzhou, 215009, Jiangsu Province, China.
⁴ State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Micro-system and Information Technology, CAS, 865 Changning Road, Shanghai, 200050, China.

PMID: 29469226
DOI: 10.1002/anie.201712675

Abstract

Major disadvantages of black phosphorus (BP) are its poor air-stability and poor solubility in common organic solvents. The best way to solve this problem is to incorporate BP into a polymer backbone or a polymer matrix to form novel functional materials that can provide both challenges and opportunities for new innovation in optoelectronic and photonic applications. As a proof-of concept application, we synthesized in situ the first highly soluble conjugated polymer-covalently functionalized BP derivative (PDDF-g-BP) which was used to fabricate a resistive random access memory (RRAM) device with a configuration of Au/PDDF-g-BP/ITO. In contrast to PDDF without memory effect, PDDF-g-BP-based device exhibits a nonvolatile rewritable memory performance, with a turn-on and turn-off voltages of +1.95 V and -2.34 V, and an ON/OFF current ratio of 10⁴ . The current through the device in both the ON and OFF states is still kept unchanged even at 200th switching cycle. The PDDF/BP blends show a very unstable memory performance with a very small ON/OFF current ratio.

Keywords: black phosphorus; covalent functionalization; polymer modifications; rewritable memory devices; syntheses.

Publication types

Research Support, Non-U.S. Gov't