1：Experimental Design and Method Selection:

The study involved the fabrication of all-inorganic QLEDs using solution-processed NiOx as the hole transport layer (HTL) and ZnO as the electron transport layer (ETL), with an ultrathin Al2O3 layer deposited at the NiOx/QDs interface by atomic layer deposition (ALD) to suppress the quenching effect of NiOx on QD emission.

2：Sample Selection and Data Sources:

Green quantum dots (QDs) were synthesized and used as the emission layer. The NiOx precursor was prepared using nickel acetate tetrahydrate and monoethanolamine in ethanol.

3：List of Experimental Equipment and Materials:

Instruments included a Keithley 2400 source meter, a picoammeter (Keithley 6485), a Minolta luminance meter (CS-100), an Ocean Optics spectrometer (USB2000), and an Edinburgh Instruments FL920 spectrometer for time-resolved PL measurements. Materials included nickel acetate tetrahydrate, monoethanolamine, ammonium heptamolybdate, zinc acetate, and tetramethylammonium hydroxide.

4：Experimental Procedures and Operational Workflow:

The QLEDs were fabricated by spin-coating the MoOx precursor solution onto ITO substrates, followed by spin-coating the NiOx precursor and annealing. The Al2O3 layer was deposited by ALD, and QDs were spin-coated on the NiOx/Al2O3 layer. Finally, ZnO was spin-coated, and the Al cathode was thermal evaporated.

5：Data Analysis Methods:

The performance of the QLEDs was characterized by current density–voltage–luminance (J–V–L) measurements, electroluminescence spectra, and time-resolved PL spectroscopy.