Ag+ ion doped on the CdSe quantum dots for quantum-dot-sensitized solar cells’ application

The Optimized Thickness of Silver Doping on CdS/CdSe for Quantum Dot-Sensitized Solar Cell

“…In order to determine the morphology of the films, we used the FE-SEM images and cross-sectional of the previous paper. The result shows that the porous TiO 2 nanoparticles look like a sphere and the size average of 62.5 nm and thickness of the TiO 2 /CdSe:Ag + were about 13 μm (Figure 1(b)) [24]. This result is also confirmed by TEM (shown in Figure 1(c)).…”

“…In order to study the photovoltaic characteristic, we conducted a set of the QDSSCs with different thickness (an active area of 0.38 cm 2 ) from 1 layer to 4 layers, and their parameters are listed in Table 2. When doping, open circuit parameters, short circuit currents, and efficiency are increased because the CB level of CdSe:Ag + layers raised higher than that of TiO 2 nanoparticles (listed in Table 1 and see in Figure 3) [24]. In the same optical properties, while 1.22% of performance for CdSe:Ag + 1 layer was recorded, the performance of devices for CdSe:Ag + 2 layers was sharply raised, at 3.96%.…”

“…TiO 2 paste was purchased from Dyesol inAustralia with 20 nm sized average. The fluorine-doped tin oxide (FTO) was coated with TiO 2 layers by doctor blade and then heated to 400°C for 5 minutes, 450°C for 5 minutes, 490°C for 5 minutes, and 500°C for 30 minutes[24]. It was…”

Influential Ag Concentration in Optical–Electrical Properties of Cd1–2xAg2xSe Photoanodes for Quantum‐Dot‐Sensitized Solar Cell Applications

“…[7,8] Tung et al also achieved an increase in the lifetimes of excited electrons and reducing recombination in thin films and obtained enhancement in efficiency when Ag-doped CdSe QDs were coated on the TiO 2 semiconductor. [9] In addition, the values of the electrical parameters of the TiO 2 film (R ct2 ) and cathode/polyelectrolyte (R ct1 ) decrease sharply by applying CdSe crystals-doped metallic materials. [10] In this work, we synthesized Cd 1À2x Ag 2x Se anodes with the concentration from 0% to 5% of Ag for fabricating photoanodes in the QDSSCs.…”

Silver ion-doped CdTe quantum dots as fluorescent probe for Hg2+ detection

“…4d. When a few Ag + ions are doped in the CdTe QDs, Ag + may replace Cd 2+ and result in (1) enlarging the lattice constant, thus raising the lowest energy level of the conduction band, 30,36,37 and (2) introducing anion vacancies, thus forming a shallow level under the conduction band of CdTe 38,39 (see Fig. 4d-ii).…”