A Theoretical Study on the Operation Principle of Hybrid Solar Cells

Narayan, Monishka Rita; Singh, Jai

doi:10.3390/electronics4020303

Cited by 7 publications

(8 citation statements)

References 30 publications

(46 reference statements)

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“…Photoinduced charge separation mainly takes place at the interfaces between inorganic semiconductors and conducting polymers in these hybrid materials, where electrons are injected from the conducting polymers into inorganic semiconductors, and holes remain in the polymers. This interfacial charge separation can to some extent prevent the recombination of separated electrons and holes [16]. Several studies have been carried out to find promising combinations of inorganic/organic materials, and optimal hybrid architectures have been attempted; significant progress has been attained in recent years [17,18].…”

Section: Introductionmentioning

confidence: 99%

Engineering of TiO2 or ZnO—Graphene Oxide Nanoheterojunctions for Hybrid Solar Cells Devices

et al. 2021

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It is currently of huge importance to find alternatives to fossil fuels to produce clean energy and to ensure the energy demands of modern society. In the present work, two types of hybrid solar cell devices were developed and characterized. The photoactive layers of the hybrid heterojunctions comprise poly (allylamine chloride) (PAH) and graphene oxide (GO) and TiO2 or ZnO films, which were deposited using the layer-by-layer technique and DC-reactive magnetron sputtering, respectively, onto fluorine-doped tin oxide (FTO)-coated glass substrates. Scanning electron microscopy evidenced a homogeneous inorganic layer, the surface morphology of which was dependent on the number of organic bilayers. The electrical characterization pointed out that FTO/(PAH/GO)50/TiO2/Al, FTO/(PAH/GO)30/ZnO/Al, and FTO/(PAH/GO)50/ZnO/Al architectures were the only ones to exhibit a diode behavior, and the last one experienced a decrease in current in a low-humidity environment. The (PAH/GO)20 impedance spectroscopy study further revealed the typical impedance of a parallel RC circuit for a dry environment, whereas in a humid environment, it approached the impedance of a series of three parallel RC circuits, indicating that water and oxygen contribute to other conduction processes. Finally, the achieved devices should be encapsulated to work successfully as solar cells.

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Section: Introductionmentioning

confidence: 99%

Engineering of TiO2 or ZnO—Graphene Oxide Nanoheterojunctions for Hybrid Solar Cells Devices

et al. 2021

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“…Therefore, an exciton as the Frenkel type is generated by a Coulomb force between the electron and hole in an organic material with low dielectric constant (ε = 3−4). 10,12 The material dependent constant α, which shows the ratio of the Coulomb and exchange interactions between the excited electron and hole, is calculated through eq 11: 53 α μ…”

Section: E E Ementioning

confidence: 99%

“…Upon illumination, the electron is excited to the LUMO and hole stays in the HOMO of the photosensitizer. Therefore, an exciton as the Frenkel type is generated by a Coulomb force between the electron and hole in an organic material with low dielectric constant (ε = 3–4). , The material dependent constant α, which shows the ratio of the Coulomb and exchange interactions between the excited electron and hole, is calculated through eq : where E B is the exciton singlet binding energy, ε is dielectric constant of the donor component, ℏ is the reduced Planck’s constant, ε o is the vacuum permittivity, k = (4πε o ) −1 = 9 × 10 9 N m 2 C –2 , e is the electronic charge, μ x is the reduced mass of the exciton, which is equal to 0.5 m e for the organic materials …”

Section: Computational Detailsmentioning

confidence: 99%

“…8 Therefore, the exciton formation and dissociation in the DSSCs are the main processes, 9 which can be affected by the exciton radius of the photosensitizers. 10 Organic dyes as the electron donors and inorganic semiconductors as the electron acceptors act as the active layer, which improves some processes such as Frenkel exciton formation/diffusion/dissociation in the solar cells. 11−17 DSSC development is highly dependent on the photosensitizer, which plays a main role in sunlight capturing, charge transfer, and photovoltaic performance.…”

Section: ■ Introductionmentioning

confidence: 99%

“…This process is followed by the dye regeneration and hole transport to the counter electrode . Therefore, the exciton formation and dissociation in the DSSCs are the main processes, which can be affected by the exciton radius of the photosensitizers …”

Section: Introductionmentioning

confidence: 99%

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Anchoring Group and π-Spacer Effects on the Dynamics and Kinetics of the Photovoltaic Processes in the Quinoxaline-Based Organic Dye-Sensitized Solar Cells

2018

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In this research, photovoltaic properties of the indoloquinoxaline-based dyes QX22–QX25 as the (D)2-A−π–A structure were investigated dynamically and kinetically. In these structures, two acceptors cyanoacrylic acid and 2-(1,1-dicyanomethylene)rhodanine, CCRD, and two π-spacers furan and thiophene have been used. Density functional theory (DFT), time-dependent DFT (TD-DFT), and natural bond orbital (NBO) were used to evaluate the electronic structures and excited state properties of these metal-free organic dyes. The analysis of the dynamics/kinetics of the photovoltaic parameters of the corresponding dye-sensitized solar cells (DSSCs) shows that each moiety of the D−π–A system has a more specific effect on one of the photovoltaic properties. On the basis of the obtained results, linear correlations of the incident photon to current conversion efficiency (IPCE) to the k inj/ΔG inj are stronger than that of light harvesting efficiency (LHE). Moreover, a red shift in the absorption spectra and a higher LHE in the DCRD-based dyes are observed. Although thiophene-based dyes showed an improved exciton dissociation rate, R d, QX22 and QX23 are the preferred candidates to be applied in solar cells due to their optimized quantum chemistry properties and maximum IPCE.

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Molecular engineering of inorganic halide perovskites and HTMs for photovoltaic applications

Pakravesh,

Izadyar

2023

Int J of Quantum Chemistry

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A comprehensive study was performed for the design of ABX3 perovskites, (A = Li, K, Na, B = Ge, Sn, Pb, X = F, Cl, Br, I) and organic hole transfer materials, HTMs (Fu‐2a, Fu‐2b, Fu‐2c, and Dm‐Q) for efficient perovskite solar cells (PSCs) through quantum chemistry calculations. Photovoltaic characteristics of the investigated perovskites are strongly affected by the halide anions. The results reveal that reducing the exciton binding energy of perovskites enhances the rate of the formation/dissociation of holes and electrons so F‐based perovskites are superior from this viewpoint. Additionally, the electron and hole injection processes are more favorable in the case of the F‐based perovskites in comparison with other studied perovskites. Moreover, spectroscopic properties of the perovskites demonstrate that KSnCl3, NaSnCl3, and F‐based perovskites exhibit a greater ability of the light‐harvesting and incident photon to current conversion efficiency. Ultimately, based on diverse analyses, F‐based perovskites, KSnCl3 and NaSnCl3 are the preferred candidates to be applied in the PSCs due to an excellent incident photon to current conversion efficiency, light‐harvesting efficiency, short circuit current, and solar cell final efficiency.

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A Theoretical Study on the Operation Principle of Hybrid Solar Cells

Cited by 7 publications

References 30 publications

Engineering of TiO2 or ZnO—Graphene Oxide Nanoheterojunctions for Hybrid Solar Cells Devices

Engineering of TiO2 or ZnO—Graphene Oxide Nanoheterojunctions for Hybrid Solar Cells Devices

Anchoring Group and π-Spacer Effects on the Dynamics and Kinetics of the Photovoltaic Processes in the Quinoxaline-Based Organic Dye-Sensitized Solar Cells

Molecular engineering of inorganic halide perovskites and HTMs for photovoltaic applications

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