The invention discloses a CsPbX<3>
perovskite nanocrystalline electroluminescent
diode with a self-assembled multi-dimensional
quantum well, and belongs to the field of
nanotechnology and light-emitting display. The
diode is composed of a transparent
conductive oxide anode TOC, a
hole transport layer material HTL, a CsPbX3 nanocrystalline light-emitting layer EL with a multi-dimensional
quantum well structure, an
electron transport layer material ETL and a
metal cathode CL. Firstly, a self-assembled multi-dimensional
quantum well CsPbX3 nanocrystalline solution is prepared by adopting a
chemical synthesis method. Then, a
hole transport layer material HTL, a CsPbX3 self-assembled multi-dimensional
quantum well nanocrystalline solution and an
electron transport layer material ETL are spin-coated on the TOC by adopting spin-
coating technology. Finally a
metal cathode CL on the ETL is deposited by adopting a
vacuum evaporation technology. According to the invention, any emission spectrumwithin a visible
light emission range of 400-700 nanometers can be realized by regulating and controlling the dimension and components of the self-assembled multi-dimensional
quantum well CsPbX3 nanocrystalline; the
fluorescence quantum yield of the CsPbX3 nanocrystalline with the multi-dimensional
quantum well structure is high, and the defects are few; an electroluminescent
diode is high in luminous efficiency and external
quantum efficiency, good in stability and long in service life.