Cubic NaSbS2 as an Ionic-Electronic Coupled Semiconductor for Switchable Photovoltaic and Neuromorphic Device Applications.,Advanced Materials

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Cubic NaSbS2 as an Ionic-Electronic Coupled Semiconductor for Switchable Photovoltaic and Neuromorphic Device Applications.
Advanced Materials ( IF 27.4 ) Pub Date : 2020-01-08 , DOI: 10.1002/adma.201906976
P C Harikesh _{1,

2} , Abhijith Surendran ₃ , Biplab Ghosh ₁ , Rohit Abraham John ₄ , Arjun Moorthy ₁ , Natalia Yantara ₁ , Teddy Salim ₄ , Krishnamoorthy Thirumal ₁ , Wei Lin Leong _{1,

3} , Subodh Mhaisalkar _{1,

4} , Nripan Mathews _{1,

4}

Affiliation

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 NaSbS2 -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.

中文翻译：

立方NaSbS2作为离子电子耦合半导体，适用于可开关的光伏和神经形态设备应用。

钙钛矿型卤化钙钛矿作为离子电子耦合半导体的最新出现推动了对具有类似可调节离子和电子传输特性的溶液可替代材料的研究。在这里，通过理论和实验相结合的方法，研究了一种新型的用于离子电子耦合传输的半导体立方NaSbS2。该材料在惰性气氛中表现出混合的离子电导率，而在潮湿空气中表现出超离子电导率。结果表明，这种材料在电场作用下的沉积后电子可重构性引起离子离析，从而产生可切换的光伏效应。通过电偏压和持久的光电导性利用材料的离子组成的后扰动，

更新日期：2020-02-18

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