Metalloporphyrin compounds have been extensively studied in many functional chemistry fields, such as photo-physics and liquid crystal quality studies[1-5]. But the studies of lanthanide acetyl-acetonate benzoporphyrin complexes with meso-tetra-alkyl substituents in the ligand [Ln(TATBP)acac] have not been reported yet. We studied photochemical hole-burning, semiconductor and luminescence properties of these complexes by means of cyclic voltammetry, surface photovoltage and luminescence spectroscopies. These studies will lay the foudations for the choice and application of these materials. The structures of the ligand(TATBP) and complexes [Ln(TATBP)acac] are shown in Fig.1.