Dye-sensitized solar cells (DSSCs) have attracted considerable attention in recent years as they offer the possibility of low-cost conversion of photovoltaic energy. This account focuses on recent advances in molecular design and technological aspects of sensitizers based on metal complexes, metal-free organics and tetrapyrrolic compounds which include porphyrins, phthalocyanines as well as corroles. Special attention has been paid to the design principles of these dyes, and co-sensitization, an emerging technique to extend the absorption range, is also discussed as a way to improve the performance of the device. This account also focuses on recent advances of efficient ruthenium sensitizers as well as other metal complexes and their applications in DSSCs. Recent developments in the area of metal-free organic and tetrapyrrolic sensitizers are also discussed.

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Herein, we designed and synthesizeda series of 1,2,3‐triazole tethered 3‐hydroxy‐2‐oxindoles (4 a‐j) using N‐propargyl isatin derivatives as key starting materials (1 a‐d) under ball‐milling conditions by merging aldol condensation and click reaction. The synthesized compounds (4 a‐j) were examined for their corrosion inhibition behavior in mild steel using gravimetric and electrochemical analysis. The compound 4 i was identified as the most efficient compound with an efficiency of >70%. Also, the adsorption of inhibitors on the surface of mild steel and mixed type of behaviors was evidenced by impedance and Tafel polarization studies, respectively. Further, the evaluation of antibacterial and antifungal activities demonstrated that compound 4 gpossessed a significant potential to behave as an antimicrobial agent.