Differences of LED and OLED

Although there are light emitting semiconductor, but there are differences between the LED and OLED structure, the main difference is:
1) OLEDs exciton with different LED's the light emitting , LED is formed by injecting electrons and holes excitons, light color depends on the composition of the semiconductor band gap; OLED form excitons by injecting electrons and holes, shock sub attenuation and light, the luminescent color depending on the fluorescence spectra of organic molecules.
2) an organic film QVGA lcd regardless of molecular size or polymer, are generally amorphous thin film (organic material by thermal evaporation, molecules evaporate at room temperature on a substrate to form a thin film supercooled state), and is a great band gap insulation membrane,the inorganic LED is ordered doped semiconductor single crystals.
3) carrier transport process in the OLED and LED are also different, the charge moves between organic molecules by the molecular ionization, such as a hole transfer in the molecule is actually neutral and positively charged molecules repeated oxidative intermolecular and restore process. The inorganic semiconductor charge transport by the band conduction.