▎ 摘　　要

NOVELTY - Perovskite light emitting diode has a transparent conductive substrate (1) provided with a first transmission layer, a first perovskite light emitting layer (3), a second transmission layer, a first middle connecting layer (5), a third transmission layer, a second perovskite light emitting layer, a fourth transmission layer, a second middle connecting layer, a fifth transmission layer, a third perovskite light emitting layer, a sixth transmission layer and a metal electrode. The first transmission layer and the second transmission layer are respectively formed with a first hole injection layer (2) and a first electron injection layer (4). USE - Perovskite light emitting diode for a light emitting device. ADVANTAGE - The large gain on the luminous efficiency is realized, and the stability is improved. The flexible combination of three-junction luminous layer is realized, so as to realize the wide application of the perovskite capable of emitting white light. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing perovskite light emitting diode, which involves taking a transparent conductive substrate, and preparing a first hole injection layer on the transparent conductive substrate, preparing a first perovskite luminescent layer on the first hole injection layer, preparing a first electron injection layer on the first luminescent layer of the perovskite, preparing a first intermediate connection layer on the first electron injection layer, preparing a second hole injection layer on the first intermediate connection layer, preparing a second luminescent layer of perovskite on the second hole injection layer, preparing a second electron injection layer on the second luminescent layer of the perovskite, preparing a second intermediate connection layer on the second electron injection layer, preparing a third hole injection layer on the second intermediate connection layer, preparing a third luminescent layer of perovskite on the third hole injection layer, preparing a third electron injection layer on the third luminescent layer of the perovskite and preparing metal electrode on the third electron injection layer to obtain the perovskite light-emitting diode. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of perovskite light emitting diode. Transparent conductive substrate (1) First hole injection layer (2) First perovskite light emitting layer (3) First electron injection layer (4) First middle connecting layer (5)