Lianfeng Zhao

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: Valence and conduction band densities of states measured via ultraviolet and inverse photoemission spectroscopies on three metal halide perovskites are reported, revealing an unusually low DOS at the valence band maximum (VBM) of these compounds, which confirms and generalizes previous predictions of strong band dispersion and low DOS in these compounds.

TL;DR: 2D Ruddlesden-Popper phase hybrid lead bromide perovskite single crystals are promising materials for low operating current nanodevice applications because of their mixed electronic and ionic transport and ease of fabrication.

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.