Figure 1.

a) Structure of the dendritic ZnPc‐SA biohybrid PS 1 and 2. b) Cartoon showing the strategy to enhance the photodynamic performance of 1. The PS is inactive and highly aggregated into hydrophilic nanoparticles outside the cell (step A). Aggregation is disrupted after internalization, by incorporation into the membrane of lysosomes (step B, represented by red arrow), which results in an on‐site activation of the PS photodynamic properties (step C).