| abstract |
A system for displaying images employing an organic electroluminescent device is provided. The organic electroluminescent device includes a first electrode, an organic electroluminescent element disposed on the first electrode, a second electrode disposed on the organic electroluminescent element, and a color tuning element disposed on the second electrode. In particular, the color tuning element has a thickness range T 1: 3500 Å≦T 1 ≦4500 Å, 6500 Å≦T 1 ≦7500 Å, 9500 Å≦T 1 ≦10500 Å, 11000 Å≦T 1 ≦12000 Å, 13500 Å≦T 1 ≦14500 Å, 16500 Å≦T 1 ≦17500 Å, or 18500 Å≦T 1 ≦19500 Å. |