This presentation describes efforts to construct sensitized p-type gallium phosphide (p-GaP) photocathodes capable of sustained operation in water. Specifically, data will be presented that shows the efficacy of planar and macroporous non-degenerately doped p-GaP photoelectrodes for supporting light stimulated hole transfer from an adsorbed dye or quantum dot. Spectroelectrochemical data, X-ray photoelectron spectra, and electron microscopy images are first presented that describe the loading and stability of various chromophores on p-GaP surfaces in the dark and under illumination. Some analysis from a finite-difference model will then be discussed that describes how these photoelectrodes should ideally operate. Finally, advances in methodologies to pin the chromophores persistently to the surface will be detailed.