Synthesis and photoluminescence studies of colloidal CdSe quantum dots

Cadmium Selenide quantum dots (QD) have been widely studied for their photovoltaic properties. CdSe QDs doped with copper have been reported to have a high degree of quantum yield.¹This work focuses on a one pot synthesis of CdSe QDs in an ambient atmosphere with varied reaction times, which results in QD emission at different wavelengths. The colloidal QDs were spin coated onto silicon substrates for subsequent reflectance and photoluminescence (PL) measurements. While the former is achieved using a stabilized Tungsten Halogen light source operating in the 360 - 2600 nm range, PL is measured using the 405 nm excitation of a CW laser. All the measurements were performed with the samples placed inside a variable temperature optical cryostat spanning the 10 K - 290 K temperature range. 

1. Wageh, S.; Al-Ghamdi, A. A.; Al-Zahrani, A. A.; Driss, H. Materials Research Express 2019, 6, (8), 0850d4.