The invention discloses a composition for
stable storage at roomtemperature, comprising a stable dispersion liquid and a flocculant, wherein the stable dispersion liquid comprises
electron transporting layer nanoparticles, a ligand and a
solvent, and the flocculant is in mixe usewith the stable dispersion liquid. The invention also discloses a manufacturing method of a
quantum dot
light emitting diode device. The flocculant is added to the stable dispersion, and then an
electron transport layer is formed on the first
electrode using the formed mixture, and then the
electron transport layer isannealed. Compared with the prior art, the compositions of the present invention can be stably stored at
room temperature. In the fabrication process of
quantum dot
light emitting diode device, with the increase of annealing time, the ligands on the surface of
electron transport layer nanoparticles fall off, thus ensuring the fabrication effect of
quantum dot
light emitting diode device and reducing the storage cost in the production process.