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Cubic NaSbS 2 as an Ionic–Electronic Coupled Semiconductor for Switchable Photovoltaic and Neuromorphic Device Applications
Author(s) -
Harikesh P. C.,
Surendran Abhijith,
Ghosh Biplab,
John Rohit Abraham,
Moorthy Arjun,
Yantara Natalia,
Salim Teddy,
Thirumal Krishnamoorthy,
Leong Wei Lin,
Mhaisalkar Subodh,
Mathews Nripan
Publication year - 2020
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201906976
Subject(s) - materials science , neuromorphic engineering , photovoltaic system , semiconductor , ionic bonding , optoelectronics , nanotechnology , photovoltaics , engineering physics , ion , electrical engineering , computer science , machine learning , artificial neural network , physics , quantum mechanics , engineering
The recent emergence of lead halide perovskites as ionic–electronic coupled semiconductors motivates the investigation of alternative solution‐processable materials with similar modulatable ionic and electronic transport properties. Here, a novel semiconductor—cubic NaSbS 2 —for ionic–electronic coupled transport is investigated through a combined theoretical and experimental approach. The material exhibits mixed ionic–electronic conductivity in inert atmosphere and superionic conductivity in humid air. It is shown that post deposition electronic reconfigurability in this material enabled by an electric field induces ionic segregation enabling a switchable photovoltaic effect. Utilizing post‐perturbation of the ionic composition of the material via electrical biasing and persistent photoconductivity, multistate memristive synapses with higher‐order weight modulations are realized for neuromorphic computing, opening up novel applications with such ionic–electronic coupled materials.