CdS/CdSe co-sensitized TiO2 nanowire-coated hollow Spheres exceeding 6% photovoltaic performance

Quantum dot sensitized solar cell: Recent advances and future perspectives in photoanode

“…Solar cell having ZnO HMSP/ NW photoanode shows high photocurrent response, FF and efficiency. As a different 3-D hierarchical structure, TiO 2 NWs are grown on the surface of hollow sphere [87]. Pore size of TiO 2 hollow sphere is controlled and optimized for achieving high PCE and J sc as 6.01% and 19.32 mA cm À 2 respectively.…”

Role of co-sensitization in dye-sensitized and quantum dot-sensitized solar cells

“…Other than this, lithium salt based electrolyte also has produced interesting results [105,106]. Novel materials such as polyoxometalates, transition metal complexes also utilized for the co-sensitization in DSSCs and QDSSCs [71,[259][260][261][262]274]. As already discussed, semiconducting nanoparticles belong to II-VI group, CdS, CdSe which are having favourable energy level for charge transfer, and also harvesting photons at two different regions are much studied for cosensitization process compared with other semiconductor nanomaterials.…”

“…To improve the QDs loading, hierarchical structures have more space compared with the other type of morphologies. Xu et al [260] fabricated a device based on the 3D hierarchical branched TiO 2 nanowires (NWs)-coated TiO 2 hallow spheres (HBTHSs). The authors obtained a remarkable efficiency about 6.01% with an in situ fabricated Cu 2 S based counter electrode.…”

Three-dimensional hyperbranched TiO2/ZnO heterostructured arrays for efficient quantum dot-sensitized solar cells

“…It is notable that an obvious red-shift phenomenon is observed for TNW-TNS-ZNR hybrid heterostructured arrays and TNW-TNS branched 355 arrays based QDSSCs at longer wavelength range from 650 nm to 750 nm compared to TNW based QDSSCs due to the enhancement of light scattering and harvesting capability at the longer wavelength region. To our best knowledge, IPCE (λ) =LHE (λ) φinj (λ) φreg ηcc (λ) 33 and the enhancement of IPCE values in the whole wavelength 360 can be attributed to the increased light harvesting efficiency (shown in Figure 3 and Figure S3) as well as enhanced charge collection efficiency ( Figure S2). As we all know, the Pt based counter electrode have poor electrocatalytic activities in polysulfide electrolyte which cause higher transfer resistance and lower QDs regeneration rate.…”