Dysprosium doping in CdTe@CdS type II core/shell and cosensitizing with CdSe for photocurrent and efficiency enhancement in quantum dot sensitized solar cells

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

“…1a, the extracted powder consists of CdS/CIS/CdSe QDs with well-ordered grain boundaries. 7 As can be observed in the TEM image (Fig. 1b), four different lattice planes are related to the lattice spacing representing the high crystallinity of the photoanode surface.…”

“…2 However, the efficiency of QDSCs based on sulfide QDs still lags far behind theoretical efficiency. 3 Quantum dot (QD) sensitizers as a core part of QDSCs have become an important research direction, including size-dependent quantum dots, 4 alloyed QDs, 5 co-sensitization QDs, 6,7 and ion-doped QDs. 8 Currently, various QDs have been investigated, such as CdS, 4,9 CdSe, 10 PbS, 6,11,12 SnSe 13 and Sb 2 S 3 .…”

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

“…have been reported. The highest PCEs among all reported type-II core/shell QDSSCs are in CdTe@Dy-Doped CdS/CdSe (8.85%) 29 and AgInS 2 /CdSe (8.39%). 30 In addition to the combined light absorption by the core and shell QDs, a type II QD has a second favorable feature of spatial separation of electrons and holes, where one type of carriers (either electrons or holes) is primarily restricted to the core, while the other is predominantly conned to the shell.…”

AgInS2/CdSe type-II core/shell quantum dot-sensitized solar cells with an efficiency of 11.75% under 0.1 sun

“…The PCE of 8.39% achieved here is higher than the best PCEs among all type-II core/shell QDSSCs reported to date, such as ZnTe/ CdSe (7.17%) and Dy-doped CdTe/CdS (8.26%). 31,34 Semiconductor nanoparticles prepared by SILAR contain a large number of defects due to the low-temperature synthesis, as evident from the XRD pattern and TEM analysis. These defects act as recombination centers.…”

“…[30][31][32][33] The best PCEs among all type-II core/shell QDSSCs reported to date are ZnTe/CdSe (7.17%) 28 and Dy-doped CdTe/CdS (8.26%). 34 Currently, the materials of core/shell QDs are primarily limited to binary suldes such as CdS, CdSe, ZnSe, ZnTe, etc. In contrast, ternary semiconductors provide a broader selection of materials because there are many more ternary semiconductors in nature.…”