Mitsubishi Materials boosts solar efficiency with new perovskite ink formulation

Mitsubishi Materials Corporation (MMC), in collaboration with EneCoat Technologies, has unveiled a novel ink formulation to enhance the electron transport layers (ETLs) in perovskite solar cells. This advancement has achieved a notable 1.5-fold increase in power conversion efficiency, reaching 16.0%.

Perovskite solar cells are gaining traction in the renewable energy sector due to their cost-effectiveness, high efficiency, and adaptability to flexible and lightweight installations. However, their commercial viability has been constrained by challenges related to durability and stability. Recent technological progress, including MMC’s latest innovation, is helping overcome these barriers.

Perovskite solar cells are generally designed in two forms: normal (n-i-p) and inverted (p-i-n) structures. Inverted cells are often preferred for their simpler manufacturing process and superior stability. However, forming ETLs on the delicate perovskite layer without damage remains a challenge. Conventional methods rely on costly vacuum-based fullerene (C60) processes. To address this, MMC and EneCoat Technologies developed a more economical coating technique using an organic solvent-based ink.

This proprietary ink ensures the uniform dispersion of tin oxide nanoparticles. By applying a specialized coating to these nanoparticles, the formulation prevents aggregation, resulting in a dense and even ETL. This design promotes efficient electron transport from the perovskite layer to the metal electrode, enhancing solar cell performance.

This advancement also improves electron mobility and reduces manufacturing costs, making solar power more accessible, and supporting the transition to sustainable energy. MMC and EneCoat Technologies remain committed to refining their formulation and scaling production for commercial applications to contribute to the global push for a low-carbon future.