Review paper: Toward highly efficient quantum-dot- and dye-sensitized solar cells

All spray pyrolysis-coated CdTe–TiO2 heterogeneous films for photo-electrochemical solar cells

“…5a-d. The key parametric values reported in the present study indicate that some of the values are much better than previously reported, but some are not [4,6,24]. However, the present study explores the possibility of fabricating the complete photo-anode (TiO 2 -CdTe) by SPD method and the results showed the feasibility to achieve the solar cells with decent performance metrics.…”

“…Dye-and quantum-dot-based photovoltaic devices are important category in electrochemical solar cell technology due to their high performance and lower cost [4,5]. Various dyes and quantum dots exhibiting optical absorption at different energy ranges were explored to develop electrochemical solar cell technology with different electrolytes [6,7]. Various technical challenges including adsorption and stability of dyes onto electron acceptors, volatile, and corrosive nature of electrolytes are a few major hurdles in the progress roadmap of photo-electrochemical solar cell technology [8,9].…”

Strategic PbS quantum dot-based multilayered photoanodes for high efficiency quantum dot-sensitized solar cells

“…It should be noted that the light absorbance of CdS is higher than that of In2S3 due to its smaller band gap, which is the reason for the large scontribution of CdS interlayer to JSC than In2S3 layer [42,45,46]. Therefore, CdS (Eg ≈ 2.4 eV) or other similar interfacial layer deposited on mesoporous TiO2 prior to the main absorber QDs with a smaller Eg is an effective strategy to improve the photocurrent density by absorbing high-energy photons and enhancing QDs loading [19,42,46,51,52]. However, the VOC value was rarely affected by the CdS interlayer because, as shown in Fig.3c, it hardly restricted the electron back-transfer and recombination via the route 2 due to its position, which is a main recombination route for the carriers generated from PbS.…”

Dual effect of TiO2 and Co3O4 co-semiconductors and nanosensitizer on dye-sensitized solar cell performance

“…Excitation of dye sensitizer that was doped onto semiconductor or co-semiconductor by sun radiation to generate an electron and leave behind a hole is the initial photon-induced electron reaction in DSSC (Yum et al 2014). After transition of the excited electron from semiconductor conduction band to a counter electrode through working electrode, the ground state of the dye is reached by electrolyte oxidation (Choi et al 2013;Han and Ho 2014). The main issue is in returning some electrons back to the dye ground state or electrolyte causing an increase in the electron-hole recombination rate and then deficiency in DSSC efficiency (Lai et al 2008;Akpan and Hameed 2009;Yamaguchi et al 2010;Reda 2010;Kato et al 2011;Tian et al 2010;Kantonis et al 2011;Sharma et al 2010;Basheer et al 2014a, b).…”