Fig. 4: Tandem QLEDs operate in full-color-tunable mode.
From: Face-to-face integrated tandem quantum-dot LEDs with high performance and multifunctionality
a The schematic device structure of the full-color-tunable QLED with R/G/B LEUs. b The color coordinates of the achievable colors by the full-color-tunable QLED. c The J-V-L and EQE-V characteristic curves of R/G/B LEUs under independent driving modes, together with the PE-V of R/G/B LEUs under parallel driving mode. d The calculated and experimental spectra of white QLEDs with different color temperatures, and the inset shows the photographs of the white lighting effects. e The lighting effects of the red, green, and blue primary colors, as well as the complementary colors cyan, yellow, and magenta. f The EQE of QLEDs with different emission colors at 10,000 cd m-2
