Oleic capped CdSe nanocrystals silver-doped in the course of synthesis

AgCl-doped CdSe quantum dots with near-IR photoluminescence

“…We investigated the silver content in the QDs over time using XRF. The amount of silver was found with the use of the calibration curve presented in the Supplementary data of [22]. The analytical signal was determined as the integral intensity ratio between the Ag Kα line ( S Ag ) and the Cd Kα line ( S Cd ).…”

“…The analytical signal was determined as the integral intensity ratio between the Ag Kα line ( S Ag ) and the Cd Kα line ( S Cd ). The calibration curve is described by the linear equation [22]:…”

“…The major differences from our previous investigations are the type of Ag precursor and the way of adding this precursor to the reaction mass [22,25]. We used a silver complex of AgCl with triphenylphosphine (Ag 4 Cl 4 (PPh 3 ) 4 ) before [22], which should be more stable than our new precursor, namely a AgCl solution in trioctylphosphine (TOP).…”

“…We used a silver complex of AgCl with triphenylphosphine (Ag 4 Cl 4 (PPh 3 ) 4 ) before [22], which should be more stable than our new precursor, namely a AgCl solution in trioctylphosphine (TOP). Ag 4 Cl 4 (PPh 3 ) 4 was added to the reaction mass in solid state without prior dissolution.…”

“…Charge carriers could be trapped by both surface defects [ 15 – 16 ] and volume defects [ 17 – 21 ]. It is known that doping CdSe QDs with Ag leads to the emergence of a low-energy band [ 22 – 23 ]. However, there are only a few publications devoted to Ag-doped CdSe QDs.…”