Kyung Min Lee

TL;DR: In this article, the authors report highly efficient perovskite LEDs enabled through the formation of self-assembled, nanometre-sized crystallites, with external quantum efficiencies of 10.4% for methylammonium lead iodide system and 9.3% for lead bromide system with significantly improved shelf and operational stability.

TL;DR: In this article, a comprehensive study of perovskite optoelectronic device degradation was performed using in situ X-ray diffraction measurements, and it was shown that redox reactions are fundamental to the degradation process for CH3NH3PbI3, CsPbBr3, and CsPsPbBI3 with Ag, Al, Yb, or Cr contacts.

TL;DR: Optimized perovskite emitting layers maintain lower junction temperature during operation and thus demonstrate increased stability, and elevated device temperature caused by Joule heating is shown as an important factor contributing to device degradation.

TL;DR: In this article, photo-activation of a cleavable air-stable dimeric dopant can result in kinetically stable and efficient n-doping of host semiconductors, whose reduction potentials are beyond the thermodynamic reach of the dimer.

TL;DR: In this article, a light scattering layer that employs air voids (low-index scattering centers) embedded in a high-index polyimide matrix to effectively frustrate the substrate-trapped light, increasing the outcoupling efficiency was developed.