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电解发光来自大声学处理溶液的MoS₂纳米薄膜

Sonal V Rangnekar¹, Vinod K Sangwan¹, Mengru Jin¹

¹Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States.

|August 22, 2023

概括

研究人员开发了一种新方法,使用电化学间歇和超声波脱皮来制造二硫化物 (MoS2) 油墨. 这一突破使灵活光源的大面积溶液加工薄膜中的电发光成为可能.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
光电学是指光电子产品.

背景情况:

由于其光电子特性,二维 (2D) 过渡金属二甲基化物 (TMD) 对电发光器件有很大的前景.
适用于大面积膜的光电子活性TMD单层的可扩展生产仍然是一个挑战.

研究的目的:

为了在大面积,溶液处理的二硫化物 (MoS2) 薄膜中证明电发光.
为了克服用于设备制造的TMD单层隔离的局限性.

主要方法:

电化学间接和超声波脱皮,以产生富含单层MoS2墨水.
制造MoS2纳米薄膜和垂直发光电容器设备.
光发光和电光发光性质的表征.

主要成果:

观察到的特征单层MoS2光发光和电光发光在1.88-1.90 eV的峰值.
排放强度随着薄膜厚度 (10-70 nm) 的增加而增加.
在使用垂直电容架构的大面积设备中实现了统一的电光发射.

结论:

在解决方案处理后,大声波剥离的MoS2单层在薄膜中保留了它们的直接带隙特征.
建立了超级声波MoS2墨水作为灵活的增材制造平台,用于灵活的,有图案的光源.
该方法有可能扩展到其他TMD半导体.

关键词:

两维材料是二维材料.电化学脱皮电化学脱皮发光电容器的发光电容器可以发光.超级声波的超级声波化二硫化物是一种二硫化物.

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