Optical Axes of Triclinic Crystals in Wanderland
Wandering of optical axes of van der Waals rhenium disulphide or diselenide are enabled by the unique disposition of excitons in their lattices and broken crystal symmetries that together lead to the decoupling of absorption and refraction dielectric permittivities.
Efficient, narrow-band, and stable electroluminescence from organoboronnitrogen-carbonyl emitter
We report a molecular-design strategy, i.e., hybridization of organoboron-nitrogen and carbonyl. OLEDs exploiting binary emitting layers achieve ultrapure emission, a maximum efficiency of over 40% with mild roll-off, and operational stability of LT95~ 137 h of the initial luminance at 1000 nits.
Tough Choices: Defining national net zero goals is critical for food and land use policy
Development of Net-Zero pathways within the Agriculture Forestry and Other Land Use sector is vital for effective policy, but national definitions lack clarity. An Irish study shows how NZ outcomes vary widely, depending on the applied definition.