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Covalent Functionalization of Black Phosphorus with Conjugated Polymer for Information Storage
Author(s) -
Cao Yaming,
Tian Xiangyu,
Gu Junwei,
Liu Bo,
Zhang Bin,
Song Sannian,
Fan Fei,
Chen Yu
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201712675
Subject(s) - resistive random access memory , polymer , covalent bond , conjugated system , surface modification , materials science , black phosphorus , solubility , non volatile memory , photonics , derivative (finance) , nanotechnology , optoelectronics , chemistry , organic chemistry , electrode , financial economics , economics , composite material
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 10 4 . 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.