Colloidal nanocrystals (NCs) of all-inorganic lead halide perovskites (LHP) provide a variety of perspectives for application in optoelectronic devices. . Due to their high luminescence quantum yields (50-99 %), defect tolerance and narrow full width at half maximum (FWHM, 12-40 nm for blue-to-red), as well as tunable emission color (by halide composition and size dependence), LHPs are ideal candidates for high-quality light sources in light emitting devices (LEDs) and full-color displays. Despite these remarkable properties, their chemical instability constitutes a significant challenge for the long-term use in such applications. For LHP NCs, the chemical instability is particularly pronounced owing to their large surfaceto-volume ratio. This natural disadvantage of colloidal NCs is partially compensated by tethering stabilizing organic ligands onto the surface of the NCs. However, the binding strengths of typical ligands, such as oleic acid or oleylamine, as well as their stability gain are relatively weak , which has motivated the search for other methods of stabilization, such as encapsulation , doping or the use of ligands with a higher binding strength. Krieg et al. have demonstrated the advantages of using zwitterionic ligands, which bind strongly to LHP NCs and provide a significantly higher stabilization. However, these ligands contain long alkyl-chains which -just like the aforementioned encapsulation strategies -lead to electrically mostly insulating LHP NCs, severely hindering their application in LEDs.