Enhancement in photovoltaic properties of exciplex quantum dot sensitized solar cells via gadolinium doping and formation of type II Core/Shell (Gd-doped CdS@CdSe) structure

Engineering the synthesized colloidal CuInS2 passivation layer in interface modification for CdS/CdSe quantum dot solar cells

“…Furthermore, photoluminescence (PL) spectroscopy is performed with a stimulating wavelength of 400 nm to explore the behaviors of charge recombination. The peaks of TiO 2 /CdS, TiO 2 /CdS/CdSe and TiO 2 /CdS/CIS/CdSe photoanodes are detected at about 600–620 nm 48. According to the PL measurements (Fig.…”

Rare-earth-incorporated ternary CexCd1−xS quantum dot-sensitized solar cells

“…Recently, Gd doping into CdS has been reported to lower the band gap and produces an enhanced efficiency. 10 The result suggests the potential of using other rare earth metals to improve QDSCs. Based on the empirical results, the band gap of a semiconductor is roughly inversely proportional to the lattice constant: a semiconductor with a small lattice constant would have a larger band gap.…”

Cu-mediated broadening of the absorption band of quaternary Cu–Ag–In–S/CdSe type-II core/shell quantum dot-sensitized solar cells with an efficiency of 12.51% under 0.25 sun

“…CdS/CdSe represents one of the extensively explored reverse type-I core/shell QD systems, achieving a PCE of 5.32% reported by Pan et al and 7.24% by Cao et al 22,23 A type II core–shell QD has the core's CB level situated between the shell's CB and VB levels. Many type-II core–shell QD systems, such as ZnTe/CdSe, 24 CdTe/CdSe, 25 Gd-doped CdS/CdSe, 26 ZnTe/ZnSe, 27 CdSe x Te 1− x /CdS, 28 etc. have been reported.…”