Mitigating the photodegradation of all-inorganic mixed-halide perovskite nanocrystals by ligand exchange

Abstract

We show that the decomposition of caesium lead halide perovskite nanocrystals under continuous X-ray illumination depends on the surface ligand. For oleic acid/oleylamine, we observe a fast decay accompanied by...

Zwitterionic Carbazole Ligands Enhance the Stability and Performance of Perovskite Nanocrystals in Light-Emitting Diodes

“…37 We note that measurements conducted on the same gold-coated substrate with CsPbBrI 2 showed strong consistency. 38 Further, the thickness of the ultrathin films and possible aggregation may cause small differences in the HOMO positions as observed in Table 1. We find an ionization energy (IE) of 5.8 eV for the native particles and 5.9 eV for the pure DCzGPC ligand.…”

Zwitterionic Carbazole Ligands Enhance the Stability and Performance of Perovskite Nanocrystals in Light Emitting Diodes

“…Minor variations in the results could stem from using different substrates 33 , yet earlier measurements conducted on the same gold-coated substrate with CsPbBrI2 showed strong consistency. 34 We find an ionization energy (IE) of 5.75 eV for the native particles and 5.9 eV for the pure DCzGPC ligand. The IE of the ligand-exchanged NCs ranges between 5.78 eV and 5.9 eV, indicating that states of the nanoparticle core contribute to valence band / 1Sh.…”

Metal-doping of halide perovskite nanocrystals for energy and environmental photocatalysis: challenges and prospects

“…[4][5][6] Thanks to the clean and sustainable nature of photocatalysis, the conversion and utilization of solar energy by photocatalysis can deal with the increasingly severe traditional energy crisis and provide a broader perspective to solve environmental pollution problems. [7][8][9][10] As an emerging discipline, photocatalytic technology is a multidisciplinary research eld covering semiconductor physics, photoelectron chemistry, catalytic chemistry, materials science, and nanotechnology. The catalyst plays the most critical role in this area.…”

“…4–6 Thanks to the clean and sustainable nature of photocatalysis, the conversion and utilization of solar energy by photocatalysis can deal with the increasingly severe traditional energy crisis and provide a broader perspective to solve environmental pollution problems. 7–10…”