Month: September 2021

September 15, 2021

Making semiconductor diodes that emit blue light has always been a challenge

Since halide perovskites first drew wide attention in 2009, when Japanese scientists discovered that they make highly efficient solar cells, these easily made, inexpensive crystals have excited researchers. So far, red- and green-emitting diodes have been demonstrated, but not blue. Halide perovskite blue-emitting diodes have been unstable — that is, their color shifts to longer, redder wavelengths with use. As Yang and his colleagues discovered, […]

September 5, 2021

Scientists in the Cava Group at the Princeton University Department of Chemistry

Utilizing single gem X-beam diffraction performed at Princeton University and X-beam pair circulation work estimations performed at the Brookhaven National Laboratory, Princeton Department of Chemistry scientists recognized that the wellspring of thermodynamic unsteadiness in the halide perovskite cesium lead iodide (CsPbI3) is the inorganic cesium molecule and its “shaking” conduct inside the gem structure. X-beam diffraction yields an unmistakable test mark of this development. The […]