Understanding what determines the organic solar cell stability

초록

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.