Researchers have demonstrated that incorporating lacunary polyoxometalate nanoclusters (L-POMs) as an interfacial layer can significantly enhance the efficiency and stability of perovskite solar cells (PSCs). These inorganic molecular structures act as interface modifiers between the perovskite layer and the hole transport layer (HTL), optimizing charge transfer and reducing energy losses. This advancement addresses one of the key challenges in PSC development: achieving high power conversion efficiencies while maintaining good long-term stability.

The study focused on how L-POMs can influence perovskite morphology and energy level alignment at the interface. It was found that L-POMs not only improve hole extraction but also passivate perovskite surface defects, which reduces non-radiative charge recombination. This translates into an increase in open-circuit voltage (Voc) and short-circuit current (Jsc), critical parameters for solar cell performance. The ability of L-POMs to form favorable interactions with both the perovskite and the HTL is fundamental to this effect.

Experimental results showed that PSCs modified with L-POMs achieved significantly higher power conversion efficiencies compared to control devices without this interfacial layer. Furthermore, these cells exhibited greater operational stability under stress conditions, such as prolonged exposure to light and humidity. This finding suggests that L-POMs are a promising strategy to overcome current PSC limitations, bringing them closer to broader commercialization. The simplicity of their incorporation into the manufacturing process is also a notable advantage.