| abstract |
The application provides a quantum dot electroluminescent device, a display device and an illuminating device having the same. The quantum dot electroluminescent device comprises an anode, a quantum dot layer, an electron blocking layer and a cathode, wherein the quantum dot layer is arranged on the surface of the anode; the electron blocking layer is arranged on the surface of the quantum dot layer away from the anode, forming an electron blocking The material of the layer includes hole transport material and/or hole injection material; the cathode is arranged on the surface of the electron blocking layer away from the quantum dot layer. The electrons and holes in the quantum dot electroluminescent device are injected into the quantum dot layer at the same rate, so that the electrons and holes are close to or reach an injection balance during the operation of the device, so that the quantum dots are electrically neutral and avoid quantum dots. Due to the phenomenon of non-radiative recombination and quantum dot charging caused by the excess of electrons in the dots, the luminous efficiency and life of the device are improved. |