Historically, molecular additives aimed at modifying the properties of titanium dioxide (TiO₂) have played a substantial role in the optimization of dye-sensitized solar cells (DSCs). Mesoporous TiO₂ films based on different shapes (nano-particulate, spheres, hollow tubes) and sizes (18-30 nm or >100 nm) has been the preferred choice for DSCs since 1991, after the seminal report by O’ Regan and Grätzel. During the last two and half decades wealth of knowledge has been generated by researchers worldwide aiming at modifying mainly anatase TiO₂ for band adjustment to facilitate electron injection from anchored dyes, and high electronic mobility for photo-generated electron collection in the domain of DSCs. In retrospection, there is a dire need to assimilate and summarize the findings of these valuable studies to further catalyze the research, better understanding and comparison of the structure-property relationship and efficiently integrate tailored properties in TiO₂ for various photocatalytic, electrochemical and nanostructured applications. This poster will aim at categorizing the typical approaches used to modify TiO₂ in the domain of DSCs such as through TiO₂ paste additives, TiO₂ doping, metal oxide layers, dye solution co-adsorbing additives, post staining surface treatment additives and electrolyte additives. A summary of the effect of these modifications on electron injection, charge extraction, electronic mobility, conduction band shift and surface states will be summarized, which is expected to hugely benefit the researchers employing TiO₂ in energy, catalysis and battery applications.