The present invention discloses a luminance and color temperature tunable (CTT) tandem OLED and use thereof, wherein the CTT tandem OLED comprises: a transparent conductive substrate, a HTL, a first lighting unit, a first carrier generation unit, a second lighting unit, a second carrier generation unit, a third lighting unit, a ETL, and a cathode. The first lighting unit is designed to emit a cold-white light, a pure-white light or an orange-white light, the second lighting unit is designed to emit a warm-white light, and third lighting unit is designed to emit an orange-white light, a pure-white light or a cold-white light corresponding to the first lighting unit. By such arrangement, it is easy for a user to make the CTT tandem OLED provide an illumination with user-desirable color temperature and illuminance by using a control interface to electrically drive the three lighting units simultaneously or individually. |