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