While the LT50 of the native control device is 6 s, exchange with DCzGPC invokes a fifteen-fold increase to 91 s under the same test conditions. This demonstrates the improved stability of LEDs with the ligand exchanged NCs. Additionally, we also monitored changes of the voltage during device stressing. For the native devices the voltage, respectively the resistance, decreased monotonically by almost 1 V, while for the ligand-exchanged devices the voltage initially increases before it starts to slightly decrease after 5 minutes of operation, but the overall change is much less. This implies a fundamentally different degradation process (Fig. ). Our results indicate that DCzGPC as a ligand for LHP NCs (specifically CsPbBr2Cl) combines the stability enhancement of the zwitterionic head group with the beneficial electronic properties of the carbazole π-system without significantly altering the size and shape of the nanocrystals. The increased performance of DCzGPC-capped NCs is evident in solution through their long-term stability in polar solvents, while in the solid state, it prolongs the LED lifetime under bias stress.