Understanding what determines the organic solar cell stability

Understanding the fundamental origin of morphological degradation in non-fullerene acceptor-based organic solar cells is challenging. In the April 2021 issue of Nature Materials, Ghasemi et al. reveal that the most thermodynamically unstable and low-miscibility systems with high Flory-Huggins interaction parameter (chi) exhibit the most kinetically stable (low diffusion) morphology for superior device operation stability under thermal stress.

Automated summary

The research suggests that the thermodynamically unstable systems with low miscibility in non-fullerene acceptor-based organic solar cells may exhibit a more stable morphology under thermal stress, leading to improved device stability.