Impurity doping is a promising method to impart new properties to various materials. Due to
their unique optical, magnetic, and electrical properties, rare-earth ions have been …

Super-resolution imaging techniques that overcome the diffraction limit of light have gained
wide popularity for visualizing cellular structures with nanometric resolution. Following the …

Opportunities for enhancing solar energy harvesting using photon upconversion are
reviewed. The increasing prominence of bifacial solar cells is an enabling factor for the …

Lanthanide-based upconversion nanomaterials have recently attracted considerable
attention in both fundamental research and various frontier applications owing to their …

Current X-ray imaging technologies involving flat-panel detectors have difficulty in imaging
three-dimensional objects because fabrication of large-area, flexible, silicon-based …

The attractive features of lanthanide-doped upconversion luminescence (UCL), such as high
photostability, nonphotobleaching or photoblinking, and large anti-Stokes shift, have shown …

Optical imaging in the second near-infrared window (NIR-II, 1,000–1,700 nm) holds great
promise for non-invasive in vivo detection. However, real-time dynamic multiplexed imaging …

Smart control of photon upconversion is a key strategy for lanthanide-based materials used
in biological and photonic applications. However, this has remained a challenge for the …

Pyroptosis, which is a mode of programmed cell death, has proven effective for cancer
therapy. However, efficient pyroptosis inducers for tumor treatment are limited. This study …

A photon avalanche (PA) effect that occurs in lanthanide-doped solids gives rise to a giant
nonlinear response in the luminescence intensity to the excitation light intensity. As a result …