期刊
NATURE MATERIALS
卷 19, 期 2, 页码 182-+出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41563-019-0548-4
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资金
- Singapore National Research Fellowship
Stretchable and self-healing light-emitting capacitors operating at low frequency and low voltage have been realized using a transparent elastomeric dielectric with high permittivity. Stretchable optoelectronic materials are essential for applications in wearable electronics, human-machine interfaces and soft robots. However, intrinsically stretchable optoelectronic devices such as light-emitting capacitors usually require high driving alternating voltages and excitation frequencies to achieve sufficient luminance in ambient lighting conditions. Here, we present a healable, low-field illuminating optoelectronic stretchable (HELIOS) device by introducing a transparent, high permittivity polymeric dielectric material. The HELIOS device turns on at an alternating voltage of 23 V and a frequency below 1 kHz, safe operating conditions for human-machine interactions. We achieved a brightness of 1,460 cd m(-2) at 2.5 V mu m(-1) with stable illumination demonstrated up to a maximum of 800% strain. The materials also self-healed mechanically and electronically from punctures or when severed. We further demonstrate various HELIOS light-emitting capacitor devices in environment sensing using optical feedback. Moreover, our devices can be powered wirelessly, potentially enabling applications for untethered damage-resilient soft robots.
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