Photovoltaic and capacitance measurements of solar cells comprise of Al-doped CdS (QD) and hierarchical flower-like TiO2 nanostructured electrode

Farooq, W. A.; Fatehmulla, Amanullah; Yahia, I.S.; AlSalhi, Mohamad S.; Fakhar-e-Alam, M.; Ali, Syed Mansoor; Ali, Khuram; Munir, Tariq

doi:10.1016/j.rinp.2019.102827

Cited by 17 publications

(5 citation statements)

References 30 publications

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“…By studying the tissue structure of the mountain lotus petal, we successfully prepared an anatase TiO 2 @MWCNT transparent (TA TiO 2 @MWCNT) thin film through the addition of multiwalled carbon nanotubes (MWCNT) into the titanium butoxide slurry and subsequent uniform ultrasonic dispersion, followed by secondary spin-coating and sintering (Figure ). Within the TA TiO 2 @MWCNT thin film, there exists a three-dimensional interwoven network of MWCNTs . This structure resembles a highway transportation network, facilitating the separation, transfer, and transport of photogenerated charge carriers while significantly reducing the intrinsic resistance and interfacial resistance of the photoanode .…”

Section: Introductionmentioning

confidence: 99%

Improved Performance of QDSSCs Can Be Achieved by Constructing a Transparent Anatase TiO₂@MWCNT Photoanode Based on the Bionic Mountain Lotus

Jiang,

Dai,

Xie

et al. 2024

ACS Appl. Mater. Interfaces

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In this research, the structural characteristics of the mountain holly leaf were emulated. It was observed that after the initially uneven surface of the petals is filled with infiltrated water, it exhibits a distinctive transparent beauty after rainfall. Furthermore, the presence of leaf veins enhances the structural strength of the petals and facilitates nutrient transport. Inspired by previous studies on double-layer spin-coated films, we further developed and designed the TA TiO 2 @MWCNT photocathode thin film. This innovative film incorporates multiwalled carbon nanotubes (MWCNT) into a previously established TA TiO 2 photocathode thin film. The inclusion of MWCNT results in the formation of a three-dimensional highway structure, where MWCNT intertwines within the TA TiO 2 film. Under the operational state of immersion in the electrolyte, it maintains a level of transparency similar to that of the TA TiO 2 photoanode thin film. The high-temperature sintering process results in the oxidation and depletion of MWCNTs on the surface of the film, leaving behind uniformly dispersed concave defects, thereby greatly enhancing the specific surface area. The findings demonstrate that the optoelectrode of high transparency and high specific surface area, TA TiO 2 @MWCNT, comprehensively enhances the performance of the solar cells. The transparent QDSSC surpasses its counterparts for the first time, achieving a power conversion efficiency (PCE) of 6.335%. This sets the stage for new materials and innovative approaches in the field of solar cells and other titanium dioxide film-related areas.

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Section: Introductionmentioning

confidence: 99%

Improved Performance of QDSSCs Can Be Achieved by Constructing a Transparent Anatase TiO₂@MWCNT Photoanode Based on the Bionic Mountain Lotus

Jiang,

Dai,

Xie

et al. 2024

ACS Appl. Mater. Interfaces

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“…Doping TiO2 with metal ions was reported to improve conductivity, which can be controlled by the quantity of the metal ions [12,13]. TiO2 is doped with Al, using AlCl3 and Al(NO3) as Al-dopant ion precursors [14], using the sol-gel preparation technique This technique is used extensively due to its ease of use, potential to obtain a greater fabrication area, and its low cost compared to other approaches.…”

Section: Introductionmentioning

confidence: 99%

“…The presence of Al as a doping element in a thin film structure could bring the Density Of State (DOS) close to the Fermi energy level and thus improve the density of charge carriers. Due to this, the electrical conductivity may rise [13,14]. When Al-doped TiO2 thin film is used instead of the un-doped TiO2 layer in solar cells, their impedance may decrease, which improves their quality.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Doped TiO2 Layer on the Performance and Stability of PCDTBT: PCBM-based Organic Solar Cells

Al-hashimi,

Abdulameer,

Banimuslem

et al. 2024

Iraqi Journal of Science

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Charge extraction layers play a crucial role in developing the performance of the inverted organic solar cells. Using a transparent metal oxide with appropriate work function to the photoactive layer can significantly decrease interface recombination and enhance charge transport mechanism. Therefore, electron selective films that consist of aluminium-doped titanium dioxide (TiO2:Al) with different concentrations of Al (0.4, 0.8, and 1.2)wt % were prepared using sol-gel technique. The inverted organic solar cells PCPDTBT: PCBM with Al doped TiO2 as electron extraction layer were fabricated. It is well known that Al doping concentration potentially affects the physical characteristics of the TiO2 by controlling the optical, morphological, and structural properties. The effect of Al incorporation on the optical and morphological properties of the prepared films were analysed using UV-Vis spectroscopy, atomic force microscopy (AFM), X-ray diffraction (XRD), and scanning electron microscopy (SEM). The current–voltage (J-V) curves of the PCPDTBT: PCBM organic solar cells show that the TiO2:Al layer with 0.8% Al wt%, has the highest power conversion efficiency which is 3.02%.

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“…Colloidal semiconductor nanocrystals (quantum dots, nanorods, nanoplatelets, nanotetrapods, etc.) form an appealing class of materials with highly tunable electronic and optical properties and a wide range of potential applications including light-emitting diodes, − lasers, , solar concentrators and solar cells, − and biological imaging. − In particular, the electronic structure of colloidal nanocrystals can be precisely modified by changing their size and shape during the synthesis procedure without any modification of their chemical composition. − Besides widely studied spherical core–shell quantum dots, such nanocrystals as nanorods and nanowires, nanoplatelets, , nanoscrolls, , and nanocrystals with more complicated shape (tetrapods and octapods) − were fabricated. Tetrapod-shaped type II heterostructured nanocrystals from different materials are among the most intriguing low dimensional semiconductor nanostructures with anisotropic shape. , The tetrapod-shaped nanocrystals have the potential to demonstrate a variety of interesting mechanical, electrical, and optical properties.…”

Section: Introductionmentioning

confidence: 99%

Charge Carrier Localization Impact on the Spectral–Temporal Photoluminescence Separation in Type II CdTe/CdSe Nano-Heterostructures

et al. 2023

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Peculiarities of exciton dynamics in tetrapod-shaped CdTe/CdSe nanocrystals (nanotetrapods) are revealed under various optical excitation conditions. The photoluminescence (PL) spectra exhibit a pair of well resolved excitonic bands originating from CdTe and CdSe parts of the tetrapod arms as well as PL caused by the indirect transitions of spatially separated charge carriers (CT band). We demonstrate the pump intensity dependent giant blue shift of the indirect transition emission band caused by the exciton's space filling effect and the modification of energy level structure by the induced internal electric field in both domains. The first-principles calculations reveal that the ground states of both electrons and holes are localized in the CdSe domain, but the charge carrier spatial separation is still present, as holes are localized at the interface. This picture is proven by the time-resolved PL measurements from the sub-picoseconds to tens of nanoseconds range, which demonstrate the presence of a picosecond time scale corresponding to the indirect excitons being much smaller than the previously observed value.

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Photovoltaic and capacitance measurements of solar cells comprise of Al-doped CdS (QD) and hierarchical flower-like TiO2 nanostructured electrode

Cited by 17 publications

References 30 publications

Improved Performance of QDSSCs Can Be Achieved by Constructing a Transparent Anatase TiO₂@MWCNT Photoanode Based on the Bionic Mountain Lotus

Improved Performance of QDSSCs Can Be Achieved by Constructing a Transparent Anatase TiO₂@MWCNT Photoanode Based on the Bionic Mountain Lotus

The Effect of Doped TiO2 Layer on the Performance and Stability of PCDTBT: PCBM-based Organic Solar Cells

Charge Carrier Localization Impact on the Spectral–Temporal Photoluminescence Separation in Type II CdTe/CdSe Nano-Heterostructures

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Photovoltaic and capacitance measurements of solar cells comprise of Al-doped CdS (QD) and hierarchical flower-like TiO2 nanostructured electrode

Cited by 17 publications

References 30 publications

Improved Performance of QDSSCs Can Be Achieved by Constructing a Transparent Anatase TiO2@MWCNT Photoanode Based on the Bionic Mountain Lotus

Improved Performance of QDSSCs Can Be Achieved by Constructing a Transparent Anatase TiO2@MWCNT Photoanode Based on the Bionic Mountain Lotus

The Effect of Doped TiO2 Layer on the Performance and Stability of PCDTBT: PCBM-based Organic Solar Cells

Charge Carrier Localization Impact on the Spectral–Temporal Photoluminescence Separation in Type II CdTe/CdSe Nano-Heterostructures

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Improved Performance of QDSSCs Can Be Achieved by Constructing a Transparent Anatase TiO₂@MWCNT Photoanode Based on the Bionic Mountain Lotus

Improved Performance of QDSSCs Can Be Achieved by Constructing a Transparent Anatase TiO₂@MWCNT Photoanode Based on the Bionic Mountain Lotus