A Solar Cell Moonlights as an LED, Both Absorbing and Emitting Light More Efficiently

A solar cell moonlights as an LED, both absorbing and emitting light more efficiently

Imagine a display that harvests ambient light when it is not actively in use, offsetting some of its own energy consumption. Materials physics shows that this is possible; the same semiconductor material can, in principle, ...

Perovskite Diode Sets Records as Both a Solar Cell and an LED

Los Angeles CA (SPX) Apr 29, 2026 A new study describes a perovskite diode that achieves 26.7% power-conversion efficiency when operated as a solar cell and 31% external quantum efficiency when operated as a light-emitting diode, performance levels that would be considered strong for a device designed to do only one of those things. Metal-halide perovskites are a class of semiconductor materials named for their distinctive