The exciton, an excited electron–hole pair bound by Coulomb attraction, plays a key role in
photophysics of organic molecules and drives practically important phenomena such as …

Progress in optical manipulation has stimulated remarkable advances in a wide range of
fields, including materials science, robotics, medical engineering, and nanotechnology. This …

Phonon-assisted photon upconversion holds great potential for numerous applications, eg,
optical refrigeration. However, traditional semiconductors face energy gain limitations due to …

Strong electron-phonon interactions are frequently considered the origin of the unique
electrical and optical properties of lead halide perovskites. Electron-phonon interactions …

Lead halide perovskite nanowires (NWs) are emerging as a class of inexpensive
semiconductors with broad bandgap tunability for optoelectronics, such as tunable NW …

Controlling emission and absorption, and radiative heat transfer, is important for photonic
energy conversion and thermal management. However, the reciprocal emission and …

Optical irradiation with suitable energy can cool solids, a phenomenon known as optical
refrigeration, first proposed in 1929 and experimentally achieved in ytterbium-doped glasses …

Recently, organic-based lead halide perovskites have received much attention for their high
performance as light absorbers in thin-film solar cells.[1–8] They exhibit not only a high …

Spin and valley degrees of freedom in materials without inversion symmetry promise
previously unknown device functionalities, such as spin-valleytronics. Control of material …

Cadmium sulfide (CdS) buffer layer that decouples the absorber layer and window layer in
thin-film solar cells was synthesized by two different chemical bath deposition (CBD) …