The great promise of photodynamic therapy (PDT) has thrusted the rapid progress of
developing highly effective photosensitizers (PS) in killing cancerous cells and bacteria. To …

Lanthanide-doped upconversion nanoparticles (UCNPs) are promising for applications as
wide as biological imaging, multimodal imaging, photodynamic therapy, volumetric displays …

Upconversion nanocrystals have been extensively investigated for optical imaging and
biomedical applications,. However, their photoluminescence is strongly attenuated by …

Upconversion of low‐energy photons into high‐energy photons increases the efficiency of
photovoltaic devices by converting photons with energies below the absorption threshold of …

Lanthanide-doped upconversion nanoparticles capable of converting near-infrared
excitation into UV and visible emissions have attracted considerable research interests in …

Lanthanide-doped upconversion nanoparticles hold promises for bioimaging, solar cells,
and volumetric displays. However, their emission brightness and excitation wavelength …

The ability to upconvert two low energy photons into one high energy photon has potential
applications in solar energy, biological imaging, and data storage. In this Letter, CdSe and …

Lanthanide-doped upconversion nanoparticles (UCNPs) are promising single-molecule
probes given their non-blinking, photobleaching-resistant luminescence on infrared …

Metallic nanoparticles show extraordinary strong light absorption near their plasmon
resonance, orders of magnitude larger compared to nonmetallic nanoparticles. This …

Piezoelectric and ferroelectric materials have shown great potential for control of the optical
process in emerging materials. There are three ways for them to impact on the optical …