Carboxymethyl cellulose (CMC) is gaining prominence in solar cell research due to its versatile properties, which contribute to enhanced stability, efficiency, and durability. Key applications include its use as an electrolyte component, a stabilizer for light-absorbing nanomaterials, and a material for flexible solar cell components. Its ability to form stable protective layers and improve ionic conductivity is central to these advancements.

CMC can be incorporated into solid-state electrolytes, offering high ionic conductivity for improved energy storage in solar-related batteries. Additionally, it serves as an effective artificial solid electrolyte interphase (ASEI) on zinc anodes, regulating ion transport and inhibiting corrosion. This results in significantly extended cycle life for rechargeable batteries used in solar energy systems.

Acting as a stabilizer, CMC helps prevent the degradation and aggregation of semiconductor nanomaterials such as lead sulfide (PbS). This protection enhances the longevity and performance of solar cells utilizing these materials. Furthermore, CMC-based nanocomposites—for instance, with copper oxide (CuO) and graphene oxide (GO)—exhibit improved optoelectronic properties, including a smaller band gap energy, which is advantageous for solar energy conversion.

CMC enables the fabrication of durable, paper-like substrates for flexible solar cells that maintain integrity under repeated bending. Its waterproof nature and film-forming ability also make it suitable for protective coatings on solar panels, safeguarding them against moisture-induced degradation.