Dengfeng Peng

Ultrasound-Induced Mechanoluminescence: From Remote Activation to Emerging Photonic and Biomedical Applications

Abstract Mechanoluminescence (ML) has traditionally been understood as a mechanically induced light emission phenomenon activated by direct contact stimuli such as fracture, deformation, or friction. The emergence of ultrasound (US) as a remote, noncontact mechanical excitation s...

Competitionbetween Two Upconversion Mechanisms forRed Emission in Er3+ and Yb3+ Codoped Rare-EarthSesquioxides

Abstract Er3+/Yb3+ codoped rare-earth sesquioxides are widely used red upconversion (UC) phosphors under near-infrared (NIR) 980 nm excitation. Besides the old mechanism, a newly identified round-trip energy transfer (RTET) between Er3+ and Yb3+ accelerates relaxation from the gr...