02/06/2026
From Messy Grains to 10.7% EQE NIR-II Perovskite LEDs
A tiny molecular additive turns a messy tin-perovskite film into a much better LED architecture, and the payoff is unusually strong for NIR-II emission.
By steering crystallization, the authors reshape CsSnI-based perovskite grains from low-lying dendritic networks into elongated island-like structures, which improves charge balance, pushes the recombination zone deeper into the bulk, and lifts performance to 10.7% EQE.
The main idea is that morphology is being used as a device-physics lever, not just a materials tweak. The elongated grains reduce excessive hole injection, lower leakage current, and suppress interfacial recombination, which helps the device keep high brightness with much less efficiency roll-off.
On the characterization side, Paios was used for transient electroluminescence, capacitance-voltage, and impedance measurements, and those measurements support the interpretation of how charge injection and recombination change with morphology.
Read the full hashtag Nature paper here: https://www.fluxim.com/publications-overview/research-paper-elongated-grain-morphology-enables-efficient-nir-ii-sn-perovskite-led
Congratulations to our customers at Huaqiao University, China and choosing Paios.
Guan, X., Li, Y., Su, Y., Meng, Y., Tong, H., Luo, Y., Lin, K., Liu, H., Wang, Y., Li, Y., Zhang, Y., Zhang, Q., Hao, S., Chen, X., Zhang, S., Lu, J., Xie, F., & Wei, Z. (2026). Elongated grain morphology for efficient and radiant NIR-II Sn-based perovskite light-emitting diodes. Nature Communications.
