Yazar "Mohammed, Mustafa K.A." seçeneğine göre listele

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    Benefitting from methylene blue dye molecule for improving performance of perovskite photovoltaics
    (Elsevier B.V., 2025) Akman, Erdi; Pirzado, Azhar Ali Ayaz; Aftab, Sikandar; Ebic, Murat; Al-Kahtani, Abdullah A.; Mohammed, Mustafa K.A.; Gulen, Mahir; Aftabuzzaman, Md; Uzun, Orhan; Jie, Jiansheng
    Tin oxide (SnO2) has great potential as an electron transport layer (ETL) for low-cost and high-performance n-i-p-type perovskite solar cells (PSCs) due to its low annealing temperature, desirable optical transparency, and good n-type behaviors. However, the existence of defects at the surface and the relatively low charge transport/extraction behavior of SnO2 ETL restrict its widespread applications in PSCs despite the advantages of SnO2-based ETL. In this study, surface engineering is performed by modifying the SnO2 ETL layer with methylene blue (MB) dye with multiple functions in order to improve the surface contact of the SnO2 surface and decrease the defect states for better photovoltaic performance in PSCs. The comprehensive and systematic analyses demonstrate that after the modification of the SnO2 ETL, oxygen vacancies and surface defects of the SnO2 surface are reduced. As a result of these improvements, the device with the MB-SnO2-based ETL presents a power conversion efficiency (PCE) of 21.47 % with a short-circuit current (JSC) of 24.51 mA/cm2, an open-circuit voltage (VOC) of 1.109 V, and a fill factor (FF) of 0.79 compared to about 19.77 % of the reference cell. Moreover, the devices under 40–50 % humidity conditions at room temperature show that the devices that were treated with MB maintained over 80 % of their initial efficiency after 600 h, whereas the reference PSC retained only ∼67 % of its initial efficiency. It is believed that this current report allocates an efficient surface engineering strategy via dye molecules for high-efficiency and stable PSCs. © 2025 Elsevier B.V.
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    Corrigendum to “High-performance perovskite solar cells using graphene quantum dot modified SnO2/ZnO photoelectrode” [Mater Today Energy 22 (2021) 100853] (Materials Today Energy (2021) 22, (S2468606921002185), (10.1016/j.mtener.2021.100853))
    (Elsevier Ltd., 2024) Nagaraj, G.; Mohammed, Mustafa K.A.; Shekargoftar, Masoud; Sasikumar, P.; Sakthivel, P.; Akın, Seçkin
    The authors regret that an error was made in Figure 3e and need to be corrected: It has been determined that an error occurred during the plotting of the data. Specifically, the plots corresponding to the conditions “0% GQDs” and “4% GQDs” were mistakenly double-pasted due to the inadvertent use of the offset option. It was found that the data imported to the plotting software and the closeness of the data made it challenging to recognize the error immediately. The updated Figure 3e is presented here which accurately differentiates the data for “0% GQDs” and “4% GQDs-doped SnO2/ZnO ETLs”.[Formula presented] Updated Figure 3e. Absorption spectra of Perovskite film corresponding to pristine SnO2, 0% GQD-doped SnO2/ZnO, and 4% GQD-doped SnO2/ZnO ETLs. The updated Figure does not impact the conclusions of the article. The correction solely addresses the accurate representation of the data presented in Figure 3e and does not change the overall results or discussions of the study. The authors would like to apologize for any inconvenience caused.
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    Molecular additive-modified rGO/TiO2 photoelectrodes for efficient mesoporous perovskite solar cells
    (Elsevier B.V., 2025) Mohammed, Mustafa K.A.; Ahmed, Duha S.; Alnayli, Raad Sh.; Kanjariya, Prakash; Ballal, Suhas; Rahman, Md. Ferdous; Al-Mousoi, Ali K.; Pandey, Rahul; Akman, Erdi
    One important component of high-performing perovskite solar cells PSCs is the electron transport layer (ETL). Nevertheless, the electrical conductivity and surface defects of the majority of ETL are insufficient to match perovskite materials. In the current study, we synthesized a modified reduced graphene oxide (m-rGO) with a simple method by employing 3-chloropropyltrimethoxysilane and 1,4-diaminophenyl molecules. Then, to increase the performance and operational durability of PSCs, we used m-rGO material as a dopant for the mesoporous titanium dioxide (mp-TiO2) film. The findings exhibited that molecular additives improve the crystallinity of perovskite film and charge transport at the ETL/perovskite interface. Besides, the formed perovskite layer on the m-rGO-based ETL had compact and low-defect morphology, resulting in reduced non-radiative recombination carriers and increased operational stability. Overall, the m-rGO-based PSCs obtained a champion PCE of 21.4 % and kept 87 % of their original efficacy after 960h of storage time. © 2025 Elsevier B.V.
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    Retraction notice to “High-performance perovskite solar cells using graphene quantum dots modified SnO2/ZnO photoelectrode” [Materials Today Energy (2021) 100853] Vol 22 (Materials Today Energy (2021) 22, (S2468606921002185), (10.1016/j.mtener.2021.100853))
    (Elsevier Ltd, 2025) Nagaraj G.; Mohammed, Mustafa K.A.; Shekargoftar, Masoud; Sasikumar P.; Sakthivel P.; Ravi G.; Dehghanipour M.; Akin, Seckin; Shalan, Ahmed Esmail
    This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/locate/withdrawalpolicy). This article has been retracted at the request of the Editor-in-Chief due to concerns about the integrity of the research reported. Following the publication of the Corrigendum (https://www.sciencedirect.com/science/article/pii/S2468606924000789) the Editor-in-Chief received additional concerns about Figure 3e and the provided data. In brief: 1. The 3 curves are unusually similar in the short wavelength range below 480 nm and appear identical in the 550–850 nm after applying scaling and offset2. The digitization step size of the curves differs and its relative change is unusually similar when considering (1)3. The curves in the data file does not appear to correspond exactly to the published figureThe corresponding authors were contacted for comment about the above-mentioned concerns and Mustafa K.A. Mohammed provided a reply. In the reply the author stated that they no longer have access to some of the original data files for Figure 3e. This, combined with the new concerns about the similarity in curves, has raised doubts for the Editor in Chief on the reliability of the data presented in the paper. In light of the above, the Editor believes that the most responsible course of action is to retract the paper. Apologies are offered to the readers that this was not detected sooner. © 2025 Elsevier Ltd