A research team led by Professor Min Jie from the Institute for Advanced Studies at Wuhan University has made significant progress in understanding the high-speed processing capabilities of organic photovoltaic materials.

The team introduced a new metric, termed A_h, to quantify the high-speed processing potential of these materials. Their findings were published in Joule under the title Mechanisms for improved high-speed processability of active layer materials in bulk-heterojunction organic photovoltaics.

The study revealed that receptor databases with the same backbone exhibited concentrated A_h distributions, with the Y6 series demonstrating exceptional potential for high-speed coating.

The team discovered through steady-state fluid dynamics simulations and in-situ absorption and fluorescence spectroscopy that the solution-driven film formation process impacts the final morphology under high-speed coating conditions.

The team also conducted a detailed analysis of solute-solvent interactions and developed an HSP-based predictive model to calculate the donor crystallization priority (P_dc), providing a robust theoretical tool for evaluating material compatibility and high-speed processing potential directly from molecular structure.

The research further demonstrated that the saturation concentration (S_c) of receptor solutions and the spreading force of the wet film are positively correlated with the high-speed solution-processing performance of active-layer systems. High Ah systems require longer receptor aggregation times during the wet film stage to maintain optimal film formation, resulting in high device efficiency.