We have synthesized 1,2-Di((9H-carbazol-9-yl)propanoyl)-sn-glycero-3-phosphocholine (DCzGPC) via a one-step Yamaguchi esterification method and shown its potential as a ligand for CsPbBr2Cl nanocrystals (NCs) with enhanced stability against polar solvents and in thin film LEDs under bias stress. We have demonstrated that DCzGPC increases the photoluminescence quantum yield of the nanocrystals, preserves their structural integrity and reduces the width of the emission peak. A concentration-dependent hypsochromic shift of the emission peak by up to 120 meV enables fine-tuning without changing the halogen composition of the NCs. In LEDs, the exchanged NCs demonstrated a fifteenfold longer operating lifetime, a 1.6-fold higher external quantum efficiency and a 25 % reduction in turn-on voltage to 3 V compared to the same NCs stabilized by oleic acid/oleylamine.