Organic solar cells of enhanced efficiency and stability using zinc oxide:zinc tungstate nanocomposite as electron extraction layer

Soultati, Anastasia; Verykios, Apostolis; Speliotis, Thanassis; Fakis, Mihalis; Sakellis, Elias; Jaouani, Hajar; Davazoglou, Dimitris; Argitis, Panagiotis; Vasilopoulou, Maria

doi:10.1016/j.orgel.2019.05.023

Cited by 19 publications

(10 citation statements)

References 70 publications

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“…This trend naturally correlates to that of the fill factor. These results confirm the effectively enhanced electron extraction, hole blocking, and reduced charge recombination losses ,,− in the OSCs with ZnO/Ru(II) ETL when going from 3 to 1 in comparison to the reference sample.…”

Section: Resultssupporting

confidence: 75%

“…It is well known that R s is attributed to the ohmic losses occurring in the entire solar cell, which includes the contact resistance at the interface, the bulk resistance of the different interfacial layers, and the photoactive blend. On the other hand, R sh is attributed to the charge carrier losses originating from recombination of charges at the interface or in the bulk and current leakage …”

Section: Resultsmentioning

confidence: 65%

“…The second effect is related to the fact that the EQE for the ZnO/Ru(II) samples have a dip at the maximum of absorption (Figure b). While some fraction of this fact might be related to changes in microstructure, ,,− we believe that the major role is played by the optimum thickness being different for the samples with and without Ru(II) complexes. In particular, for the latter, the active layer is thicker (19 mm/s compared to 73 mm/s for the reference), leading to the so-called filtering effect in the EQE .…”

Section: Resultsmentioning

confidence: 99%

“…These results indicate a good improvement in the PBDB-T:ITIC time stability with respect to literature reports (cf. partial blend decomposition and/or unwanted reactions are due to the presence of the inorganic complexes on the ZnO surface). ,,,, …”

Section: Resultsmentioning

confidence: 99%

“…Transition-metal oxides such as ZnO have been used as the bottom electron transport layers (ETLs) in the inverted device design of these OSCs because of their many useful properties such as n-type electronic transport, simple film formation via solution-processing, − transmittance within the visible spectral range, and UV light absorption (which limits UV-light-induced photodegradation of the organic materials in the PALs) . During the last decade, ZnO has also become a very promising material as a semiconductor in dye-sensitized solar cells (DSSCs) due to its unique optical, chemical, electrical, and piezoelectrical properties, as well as to the possibility of using different growth techniques to obtain it in a wide variety of morphologies: film, nanoparticles, nanowires, etc. − …”

Section: Introductionmentioning

confidence: 99%

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Heteroleptic Ruthenium(II) Complexes with 2,2′-Bipyridines Having Carbonitriles as Anchoring Groups for ZnO Surfaces: Syntheses, Physicochemical Properties, and Applications in Organic Solar Cells

et al. 2021

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Heteroleptic ruthenium (II) complexes were used for sensitizing ZnO surfaces in organic solar cells (OSCs) as mediators with photoactive layers. The complexes [Ru(4,4′-X 2 -bpy)(Mebpy-CN) 2 ] 2+ (with X = −CH 3 , −OCH 3 and −N(CH 3 ) 2 ; bpy = 2,2′-bipyridine; Mebpy-CN = 4-methyl-2,2′-bipyridine-4′-carbonitrile) were synthesized and studied by analytical and spectroscopical techniques. Spectroscopic, photophysical, and electrochemical properties were tuned by changing the electron-donating ability of the -X substituents at the 4,4′-positions of the bpy ring and rationalized by quantum mechanical calculations. These complexes were attached through nitrile groups to ZnO as interfacial layer in an OSC device with a PBDB-T:ITIC photoactive layer. This modified inorganic electron transport layer generates enhancement in photoconversion of the solar cells, reaching up to a 23% increase with respect to the unsensitized OSCs. The introduction of these dyes suppresses some degradative reactions of the nonfullerene acceptor due to the photocatalytic activity of zinc oxide, which was maintained stable for about 11 months. Improving OSC efficiencies and stabilities can thus be achieved by a judicious combination of new inorganic and organic materials.

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Section: Resultssupporting

confidence: 75%

Section: Resultsmentioning

confidence: 65%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Heteroleptic Ruthenium(II) Complexes with 2,2′-Bipyridines Having Carbonitriles as Anchoring Groups for ZnO Surfaces: Syntheses, Physicochemical Properties, and Applications in Organic Solar Cells

et al. 2021

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Progress in Stability of Organic Solar Cells

2020

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The organic solar cell (OSC) is a promising emerging low‐cost thin film photovoltaics technology. The power conversion efficiency (PCE) of OSCs has overpassed 16% for single junction and 17% for organic–organic tandem solar cells with the development of low bandgap organic materials synthesis and device processing technology. The main barrier of commercial use of OSCs is the poor stability of devices. Herein, the factors limiting the stability of OSCs are summarized. The limiting stability factors are oxygen, water, irradiation, heating, metastable morphology, diffusion of electrodes and buffer layers materials, and mechanical stress. The recent progress in strategies to increase the stability of OSCs is surveyed, such as material design, device engineering of active layers, employing inverted geometry, optimizing buffer layers, using stable electrodes and encapsulation materials. The International Summit on Organic Photovoltaic Stability guidelines are also discussed. The potential research strategies to achieve the required device stability and efficiency are highlighted, rendering possible pathways to facilitate the viable commercialization of OSCs.

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Incorporation of Nanocomposite Thin Films as Effective Electrodes for Photovoltaic Devices Applications

Abdelhaleem

Balboul

2022

Advances in Nanocomposite Materials for Environmental and Energy Harvesting Applications

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Organic solar cells of enhanced efficiency and stability using zinc oxide:zinc tungstate nanocomposite as electron extraction layer

Cited by 19 publications

References 70 publications

Heteroleptic Ruthenium(II) Complexes with 2,2′-Bipyridines Having Carbonitriles as Anchoring Groups for ZnO Surfaces: Syntheses, Physicochemical Properties, and Applications in Organic Solar Cells

Heteroleptic Ruthenium(II) Complexes with 2,2′-Bipyridines Having Carbonitriles as Anchoring Groups for ZnO Surfaces: Syntheses, Physicochemical Properties, and Applications in Organic Solar Cells

Progress in Stability of Organic Solar Cells

Incorporation of Nanocomposite Thin Films as Effective Electrodes for Photovoltaic Devices Applications

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