Fig. 4: The extended colour tunable CuI-ligand thin film and devices.
From: High efficiency warm-white light-emitting diodes based on copper–iodide clusters
a–c, Photoluminescence spectra (λex = 365 nm) of CuI-Mepyrphos (a), CuI-Mepenpyrphos (b) and CuI-Nme2pyrphos (c) thin films. The insets are diagrams of energy level positions (left), structures of extended ligands (middle) and photographs of spin-coated thin films of corresponding CuI-ligand hybrids (right). Scale bars, 0.5 cm. d,e, Current density (d) and luminance (e) versus driving voltage curves for the LEDs based on extended CuI-ligand hybrids. f, The EQE versus luminance curves of the LEDs based on extended CuI-ligand hybrids. Insets are photographs of the corresponding fabricated devices based on CuI-Mepyrphos (left), CuI-Mepenpyrphos (middle) and CuI-Nme2pyrphos (right). Scale bars, 1 cm.
