Organometallic compounds for photovoltaic applications

Ciobotaru, Iulia Corina; Poloşan, Silviu; Ciobotaru, Constantin Claudiu

doi:10.1016/j.ica.2018.08.042

Cited by 7 publications

(4 citation statements)

References 26 publications

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“…This product is not derived from a homogeneous cell population. N-PERT technology refers to the production of panels using p-PERC+ and Heterojunction cell types [2,5,30,31]. The panel's transparent rear covering and entrance window allow for angular positioning, which enhances the reflection of light from the ground PERC standards for passive emitter rear cell PERC solar cells, or solar panels including these cells, have a higher efficiency in converting sunlight into electricity.…”

Section: Bifacial Solar Panelsmentioning

confidence: 99%

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Impact of Solar Cell Infrastructures on Energy Efficiency in Power Grid Integration

Unsal

2024

Cumhuriyet Science Journal

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Photovoltaic technology harvest electrical energy by stimulating liberated electrons within the semiconductor layers using solar radiation. Photovoltaic technology produces electrical energy by collecting electrons that are liberated in a semiconductor pn-junction by solar radiation. Photovoltaic solar cells have layered semiconductor structures and this study utilised for this objective. Current researches on energy storage with solar cells, focused to optimise the utilisation of the generated energy with cell efficiency. This study offers a thorough analysis of the energy efficiency of solar cells based on their infrastructures. The study involved obtaining computational visuals and doing efficiency verification. This was done by comparing the impact of different chemical structures on energy production. The MATLAB software was used with fixed parameters and varying efficiency. The results show that the Monocrystalline N-Type IBC model exhibits the maximum efficiency in terms of PV cell structure. The MIBC structure is more efficient than polycrystalline cells and also standard monotypes with high temperatures. This allows the cell to reflect itself and passivise the cell base, resulting in a 5% or more increase in energy production. Standard monotype cell has %16.2 efficiency and Monotype IBC has %20.1 efficiency results achieved with PVsyst and Matlab softwares. The results of the calculations were applied in real time and confirmed by testing the impact of structural differences on efficiency with real climate data

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Section: Bifacial Solar Panelsmentioning

confidence: 99%

“…If mounting the PV system proves challenging, it is possible to install it on the roof without causing any harm to the roof insulation. Furthermore, this installation might serve as an extra layer of protection for the rooftop [27,31]. The Biosol panels are offered in different options, including crystalline and thin film cells.…”

Section: Biosol Panelsmentioning

confidence: 99%

Impact of Solar Cell Infrastructures on Energy Efficiency in Power Grid Integration

Unsal

2024

Cumhuriyet Science Journal

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“…When the halogen is doped on the graphene lattice, it converts the sp 2 carbon bonding into a sp 3 state, which produces drastic distortions in the electronic and geometric structures of graphene . It also enhances the active site of graphene, which modifies the graphitic carbon material, enabling doped graphene to be applied in various technological fields, namely, stem cells, photo‐catalytic, DSSCs, and ORR . Halogen‐doped graphene is widely applied as an electro‐catalyst for ORR in fuel cells.…”

Section: Heteroatom‐doped Graphenementioning

confidence: 99%

Heteroatom-doped graphene and its application as a counter electrode in dye-sensitized solar cells

2018

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Summary The most frequently used counter electrode (CE) in dye‐sensitized solar cells (DSSCs) is platinum on fluorine‐doped tin oxide glass. This electrode has excellent electrical conductivity, chemical stability, and high electrocatalytic affinity for the reduction of triiodide. However, the high cost of metallic platinum and the poor electrochemical stability pose a major drawback in the commercial production. This has necessitated a search for a non‐precious metal and metal‐free electrocatalyst that demonstrates better catalytic activity and longer electrochemical stability for practical use in DSSCs. Graphene has been at the centre of attention due to its excellent optoelectronic properties. However, a defect‐free graphene sheet is not suitable as a CE in DSSCs, because of its neutral polarity which often restricts efficient charge transfer at the graphene/liquid interface, irrespective of the high in‐plane charge mobility. Hence, heteroatom‐doped graphene‐based CEs are being developed with the aim to balance electrical conductivity for efficient charge transfer and charge polarization for enhanced reduction activity of redox couples simultaneously. The elements commonly used in chemical doping of graphene are nitrogen, oxygen, boron, sulfur, and phosphorus. Halogens have also recently shown great promise. It has been demonstrated that edge‐selective heteroatom‐doping of graphene imparts both efficient in‐plane charge transfers and polarity, thereby enhancing electrocatalytic activity. Thus, heteroatom‐doped graphene serves as a good material to replace conventional electrodes and enhance power conversion efficiency in DSSCs. The focus is to reduce the cost of DSSCs. This review explores the performance of DSSCs, factors that influence the power conversion efficiency, and various physicochemical properties of graphene. It further outlines current progress on the synthetic approaches for chemical doping (substitutional and surface transfer doping) of graphene and graphene oxide with different heteroatoms in order to fine‐tune the electronic properties. The use of heteroatom‐doped graphene as a CE in DSSCs and how it improves the photovoltaic performance of cells is discussed.

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“…The use of organometallic compounds in new technologies such as organic light-emitting diodes (OLED) [1][2][3][4][5][6][7][8], photovoltaic applications [9] or catalysis [10], requires different approaches during the chemical synthesis of these compounds, going from the photoluminescence, electroluminescence and internal quantum efficiency to the charge transport and the amorphous-crystalline interplay between these organometallic molecules [11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Detailed Molecular and Structural Analysis of Dual Emitter IrQ(ppy)2 Complex

et al. 2020

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The molecular structure of the 8-hydroxyquinoline–bis (2-phenylpyridyl) iridium (IrQ(ppy)2) dual emitter organometallic compound is determined based on detailed 1D and 2D nuclear magnetic resonance (NMR), to identify metal-ligands coordination, isomerization and chemical yield of the desired compound. Meanwhile, the extended X-ray absorption fine structure (EXAFS) was used to determine the interatomic distances around the iridium ion. From the NMR results, this compound IrQ(ppy)2 exhibits a trans isomerization with a distribution of coordinated N-atoms in a similar way to facial Ir(ppy)3. The EXAFS measurements confirm the structural model of the IrQ(ppy)2 compound where the oxygen atoms from the quinoline ligands induce the splitting of the next-nearest neighboring C in the second shell of the Ir3+ ions. The high-performance liquid chromatography (HPLC), as a part of the detailed molecular analysis, confirms the purity of the desired IrQ(ppy)2 organometallic compound as being more than 95%, together with the progress of the chemical reactions towards the final compound. The theoretical model of the IrQ(ppy)2, concerning the expected bond lengths, is compared with the structural model from the EXAFS and XRD measurements.

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Organometallic compounds for photovoltaic applications

Cited by 7 publications

References 26 publications

Impact of Solar Cell Infrastructures on Energy Efficiency in Power Grid Integration

Impact of Solar Cell Infrastructures on Energy Efficiency in Power Grid Integration

Heteroatom-doped graphene and its application as a counter electrode in dye-sensitized solar cells

Detailed Molecular and Structural Analysis of Dual Emitter IrQ(ppy)2 Complex

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