| 摘要 |
<p>A fluorescence-reddening membrane comprising a light-permeable medium and, dispersed therein, (a) a rhodamine fluorescent pigment and (b) a fluorescent pigment which has absorptions in the blue region and induces energy transfer to and reabsorption from the pigment (a). The membrane can convert the color of light emitted by a blue-emitting organic electroluminescent device to red light at a high conversion efficiency and can provide a red-emitting device which is inexpensive and enables reduction in size and thickness.</p> |
