As temperature was increased, a similar trend of QY (and PL peak wavelength) was observed but reactions occur more quickly, due to a more rapid thermal decomposition of DDT. Clearly the reaction at Fig. 1 a Quantum yield (bottom curves) and PL peak wavelength (upper curves) of CIS NCs versus growth time at different temperatures. b Evolution of CIS NCs’ PL and absorbance spectra (inset) versus growth time at 260 C