Rare-earth-free zinc oxide achieves a first in stress-to-light conversion

Mechanoluminescent materials convert mechanical energy such as stress, strain and vibration directly into light, making them attractive as self-powered sensors that require no batteries or wiring. From biomedical sensors to self-powered infrastructure monitoring sensors, mechanoluminescent materials have a wide range of potential applications. However, high-performance mechanoluminescent materials have traditionally relied on expensive rare-earth materials or complex material compositions.

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