Concentration dependence of physical properties of low temperature processed ZnO quantum dots thin films on polyethylene terephthalate as potential electron transport material for perovskite solar cell

Muhammad, Sani; Nomaan, Ahlaam T.; Olaoye, AbdulmutolibO.; Idris, Muhammad Idzdihar; Rashid, Marzaini

doi:10.1016/j.ceramint.2022.07.077

Cited by 13 publications

(3 citation statements)

References 71 publications

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“…The crystallite size (L), lattice constant (a), interplane distance (d), dislocation density (δ), and internal strain (ε) were evaluated using equations (1)-( 5) respectively [13][14][15]. 𝐿 = 0.94𝜆 𝛽cos 𝜃…”

Section: Methodsmentioning

confidence: 99%

Facile low temperature processed nanostructure ZnO QD based thin films for potential perovskite solar cell: thickness dependence of crystal and electrical properties.

Muhammad

Nomaan

Olaoye

et al. 2022

J. Phys.: Conf. Ser.

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The precipitation-spin coating technique is employed to prepare nanostructure ZnO quantum dot (QD) films at different thicknesses. The X-ray diffraction analysis reveals the polycrystalline thin film growth along (101) plane and crystallinity improvement with thickness rise. The increase in thickness causes an increase (5.14 - 7.73 nm) and a decrease (3.39- 3.22 eV) in grain size and bandgap respectively. At optimized thickness, the ZnO QD thin film exhibits 72 % transmittance with the lowest resistivity of 16.24 x 10-2 Ωcm and highest carrier mobility of 15.38 cm2/Vs rendering it viable for potential utilization as an electron transport layer for perovskite devices.

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Section: Methodsmentioning

confidence: 99%

Facile low temperature processed nanostructure ZnO QD based thin films for potential perovskite solar cell: thickness dependence of crystal and electrical properties.

Muhammad

Nomaan

Olaoye

et al. 2022

J. Phys.: Conf. Ser.

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“…As is well known, polycrystalline perovskite films are typically prepared via solution processing methods, which inevitably introduce defects such as uncoordinated Pb 2+ and halide ion (I – ) vacancies at the grain boundaries and interfaces between the perovskite layer and the electron-transporting layer (ETL). , Numerous studies have engaged to improve the crystallinity and morphology of the perovskite films and passivate defects on the surface or at the interface via various strategies, including additive implementation, , antisolvent engineering, − and interface adjustment. ,− Particularly, interfacial engineering with functional semiconductors has been proved to be an effective approach for enhancing the PSCs’ photovoltaic properties along with facilitating the transportation of the charges, reducing defect density, and suppressing the recombination of the carriers, thereby promoting the crystal growth of the perovskite film and improving the photovoltaic performance of the solar cells. − Among them, nanomaterial nitrogen-doped graphene quantum dots (N-GQDs) can act as an effective interface modulation reagent for efficient PSCs, which is utilized to ameliorate the following perovskite film quality and facilitate charge-transfer kinetics as well. Bian et al embedded N-GQDs on the surface of γ-CsPbI 3 -based PSCs.…”

Section: Introductionmentioning

confidence: 99%

Tunable Photoluminescent Nitrogen-Doped Graphene Quantum Dots at the Interface for High-Efficiency Perovskite Solar Cells

Shen,

Lan,

Qiao

et al. 2024

ACS Appl. Nano Mater.

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The optimization of interfacial properties between the perovskite layer and the electron-transporting layer (ETL) is always a vital approach to reduce the defects for improving the photovoltaic performance of the perovskite solar cells (PSCs). Herein, nanomaterials of tunable photoluminescent nitrogen-doped graphene quantum dots (TP-N-GQDs) were prepared though a facile solid-phase microwave-assisted (SPMA) method in the presence of citric acid by adding urea as a nitrogen precursor. Leveraging the synergistic effect of N-GQDs along with the tunable photoluminescent property at the interface of PSCs proved to be an efficient strategy for enhancing the light-harvesting capability and facilitating the charge transportation simultaneously, which leads to an overall improvement of the PSC performance. Moreover, the electron-rich pyridinic nitrogen within TP-N-GQDs acted as a Lewis base, coordinating with Pb 2+ ions in perovskite and forming coordination bonds by sharing electron pairs, thereby decreasing the density of defects at the interface and the nonradiative recombination of the photogenerated carriers. Consequently, through the optimization of the nitrogen doping ratio of TP-N-GQDs, PSCs with areas of 0.09 and 1 cm 2 achieved maximum power conversion efficiencies (PCEs) of 21.98 and 17.12%, respectively. Additionally, TP-N-GQD passivation significantly enhanced the long-term stability of the device. The unencapsulated TP-N-GQDmodified device could sustain about 83% of its initial PCE afterward for 30 days of storage in air (25 ± 5 °C, RH 25 ± 5%).

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“…Each layer is very important, but, in practice, the loss of efficiency is closely related to the ability of the ETL to transport photogenerated electrons. The electron transport layer plays an important role within the structure of the solar cell, since the electron transport layer, depending on its morphology, the type of material from which it is built, and its physical properties, will be used for better stability, prolonged life, and offer higher PCE, some of the most widely used materials are metal oxides, some of the most commonly used materials are metal oxides, such as TiO 2 [ 8 , 9 , 10 ], ZnO [ 11 , 12 , 13 ], SnO 2 [ 14 , 15 , 16 ], SiO 2 [ 17 ], and ZrO 2 [ 18 , 19 ]; each material provides specific advantages.…”

Section: Introductionmentioning

confidence: 99%

Growth of Nanocolumnar TiO2 Bilayer by Direct Current Reactive Magnetron Sputtering in Glancing-Angle Deposition Configuration for High-Quality Electron Transport Layer

Rosales Medina,

Avelar Muñoz,

Flores Sigala

et al. 2023

Micromachines

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The electron transport layer (ETL) plays a crucial role in solar cell technology, particularly in perovskite solar cells (PSCs), where nanostructured TiO2 films have been investigated as superior ETLs compared to compact TiO2. In this study, we explored the nanocolumnar growth of TiO2 in the anatase phase for bilayer thin films by DC reactive magnetron sputtering (MS) technique and glancing-angle deposition (GLAD). For the growth of the compact TiO2 layer, it was found that the crystalline quality of the films is strongly dependent on the sputtering power, and the samples deposited at 120 and 140 W are those with the best crystalline quality. However, for the nanocolumnar layer, the reactive atmosphere composition determined the best crystalline properties. By optimizing the growth parameters, the formation of TiO2 nanocolumns with a cross-sectional diameter ranging from 50 to 75 nm was achieved. The average thickness of the films exceeded 12.71 ± 0.5 µm. All nanostructured films were grown at a constant GLAD angle of 70°, and after deposition, the measured inclination angle of the nanocolumns is very close to this, having values between 68 and 80°. Furthermore, a correlation was observed between the quality of the initial layer and the enhanced growth of the TiO2 nanocolumns. All bilayer films are highly transparent, allowing light to pass through up to 90%, and present a band gap with values between 3.7 and 3.8 eV. This article offers the experimental parameters for the fabrication of a nanocolumnar TiO2 using the magnetron sputtering technique and the glancing-angle deposition configuration.

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Concentration dependence of physical properties of low temperature processed ZnO quantum dots thin films on polyethylene terephthalate as potential electron transport material for perovskite solar cell

Cited by 13 publications

References 71 publications

Facile low temperature processed nanostructure ZnO QD based thin films for potential perovskite solar cell: thickness dependence of crystal and electrical properties.

Facile low temperature processed nanostructure ZnO QD based thin films for potential perovskite solar cell: thickness dependence of crystal and electrical properties.

Tunable Photoluminescent Nitrogen-Doped Graphene Quantum Dots at the Interface for High-Efficiency Perovskite Solar Cells

Growth of Nanocolumnar TiO2 Bilayer by Direct Current Reactive Magnetron Sputtering in Glancing-Angle Deposition Configuration for High-Quality Electron Transport Layer

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