Abstract
An organic light-emitting diode (OLED) device and a manufacturing method thereof are provided. The OLED device comprises more than one light emitting layer. The emissive zone is capable to emit red or long wavelength visible light near the cathode, and emit blue or short wavelength visible light near the anode. The device emits visible light with a lower color temperature at low voltages, and emits visible light with a higher color temperature at higher voltages. By adjusting the input voltage, the device is capable to emit white light or other color lights with desired color temperature.