Stretchable Hybrid Bilayered Luminescent Composite Based on the Combination of Strain-Induced and Triboelectrification-Induced Electroluminescence

Yanghui Chen; Xiaoyan Wei; Huayang Li; Youjun Fan; Weiguo Hu; Guang Zhu

doi:10.1021/acsomega.9b01717

Stretchable Hybrid Bilayered Luminescent Composite Based on the Combination of Strain-Induced and Triboelectrification-Induced Electroluminescence

ACS Omega. 2019 Nov 25;4(24):20470-20475. doi: 10.1021/acsomega.9b01717. eCollection 2019 Dec 10.

Authors

Yanghui Chen^{1

2

1}, Xiaoyan Wei^{1

2}, Huayang Li^{1

2}, Youjun Fan^{1

2}, Weiguo Hu^{1

2}, Guang Zhu^{1

2

3}

Affiliations

¹ CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-Nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, and Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China.
² School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, China.
³ New Materials Institute, Department of Mechanical, Materials and Manufacturing Engineering, University of Nottingham Ningbo China, Ningbo 315100, China.

Abstract

High luminescence intensity from materials that are excited by external stimuli is highly desired. In this work, a stretchable hybrid luminescent composite (HLC) that has multiple luminescence modes is reported. The luminescence can be excited either by externally applied mechanical strain or by a moving object that slides against the HLC. When the HLC is deformed, such as being twisted or folded, the ZnS/Cu phosphor experiences mechanical strain that trigger the mechanoluminescence (ML) of the phosphors. Moreover, as the HLC slides against a contact object, the triboelectrification at the contact interface induces the electroluminescence of phosphor. Here, a series of internal and external factors were studied on how they influence the luminescent intensity. It is found that the luminescent intensity from the two modes can be superposed. The HLC material was used to fabricate a fiber-based luminescent device that can be driven by air flow. The overall luminescent intensity is enhanced by over 72% compared to that obtained solely from the ML. The HLC reported in this work has such potential applications as self-powered light sources and sensors as means of detecting dynamic motions and interaction.