ZnSe and ZnTe QD Synthesis.

ZnSe QDs were synthesized according to a literature method with minor modifications (Nano Lett. 2020, 20, 2387–2395). 5 mL of OLAm were loaded in the flask and degassed under vacuum at 100 °C for 30 min. Then the solution was heated to 300 °C under nitrogen, followed by a slow addition of 0.3 mL of TOP-Se (1.5 M). When the temperature reached 300 °C, 1 mL of diethylzinc solution (0.5 M, dissolved in TOP) was injected quickly into the flask under vigorous stirring. The growth temperature was kept at 290 °C. The core size was monitored by measuring the absorption spectra of aliquots. After the growth process was completed, an additional 5 mL of ODE was slowly introduced into the flask. When the targeted size of ZnSe QDs was obtained, the reaction was quenched by cooling the solution to room temperature as quickly as possible. ZnSe QDs were purified with hexane and ethanol and dispersed in hexane. For ZnTe QD synthesis, 0.45 mL of TOP-Te (1.0 M) was used instead of TOP-Se, while others were kept the same as the ZnSe QD synthesis conditions.