Ultra-Bright Near-Infrared Perovskite Light-Emitting Diodes with Reduced Efficiency Roll-off.

ABSTRACT: Herein, an insulating biopolymer is exploited to guide the controlled formation of micro/nano-structure and physical confinement of α-δ mixed phase crystalline grains of formamidinium lead iodide (FAPbI₃) perovskite, functioning as charge carrier concentrators and ensuring improved radiative recombination and photoluminescence quantum yield (PLQY). This composite material is used to build highly efficient near-infrared (NIR) FAPbI₃ Perovskite light-emitting diodes (PeLEDs) that exhibit a high radiance of 206.7 W/sr*m², among the highest reported for NIR-PeLEDs, obtained at a very high current density of 1000 mA/cm², while importantly avoiding the efficiency roll-off effect. In depth photophysical characterization allows to identify the possible r

SUBMITTER: Giuri A 

PROVIDER: S-EPMC6195535 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature