Lightamplification by stimulated emission from electrically driven colloidalquantumdots finally achieved nature
Se layer. During this reaction stage, 1.5 ml of solution C was continuously added into the reaction flask at 310 °C at a rate of 2 ml hfor 45 min. While adding solution C, Zn-oleate solution was promptly injected three times at 15, 30 and 45 min in the amount of 1 ml per injection. The particles were completed with a thin ZnS layer. 0.5 ml of solution D was continuously added in the reaction flask at 310 °C at a rate of 1 ml hfor 30 min.
After the cleaning step, the substrate was dried using a Ngas blower. Afterwards, 20 μl of ccg-QD solution were spin-coated onto the L-ITO substrate at 2,000 rpm for 30 s to form one monolayer of the ccg-QDs. This procedure was repeated two more times to prepare a film that nominally contained three ccg-QD monolayers. Following deposition, the ccg-QD film was annealed at 100 °C for 10 min.
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