Low cost, efficient, bright LED panels and solid-state lighting based on copper–iodide clusters

https://techxplore.com/news/2024-03-high-efficiency-based-copperiodide-clusters.html

"low-toxicity, scalable, warm white... nitrogen-phosphine chelating ligands and phosphine-containing solubilizing ligands... high solubility >200 mg/m, good structural stability in N, N-dimethylformamide (DMF) cross-solvent...  spin-coating in DMF exhibit low surface roughness 0.22 nm, high photoluminescence quantum yield >70%... maximum external quantum efficiency 19.1%, brightness >40,000 cd m-2, lifetime >232 h, working area 36 cm2 through blade-coating... color-tunable LEDs"