Pressure-Assisted Fabrication of Perovskite Solar Cells

Oyelade, Omolara V.; Oyewole, Oluwaseun K.; Oyewole, D. O.; Adeniji, S. A.; Ichwani, Reisya; Sanni, Dahiru M.; Soboyejo, W. O.

doi:10.1038/s41598-020-64090-5

Cited by 41 publications

(36 citation statements)

References 42 publications

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“…Figure 7a-e presents the cross-sectional SEM images of the perovskite multilayers for applied pressures between 0 MPa and 10 MPa. We observed a signi cant decrease in grain-boundary defects or voids as the applied pressures increased from 0 MPa to 10 MPa, leading to closely packed grains that can improve both e ciency and stability of PSCs 19,22,29 . However, we observed patches of damaged grains at the top of the perovskite lms at 10 MPa (Fig.…”

Section: Moderate Pressure Lowers Defect Densitymentioning

confidence: 83%

“…The use of pressure has been shown to improve optoelectronic properties of perovskite lms [18][19][20][21] . In particular, the application of moderate pressure, during the fabrication of PSCs, has also been shown to improve interfacial surface contacts in multilayered structures of mixed-halide methylammonium perovskite solar cells, leading to enhanced e ciencies 22 .…”

Section: Introductionmentioning

confidence: 99%

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Pressure-Induced Void and Crack Closure Improves the Photoconversion Efficiency and Stability of Perovskite Solar Cells

Oyewole

Agyei‐Tuffour

et al. 2020

Preprint

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One route to a brighter global energy future may be through enhancing the efficiency and stability of perovskite solar cells (PSCs), which depends on the level of defects in the photoactive absorber and along the interfaces of the multilayered structure. Here, we use a combined experimental and theoretical approach to study the effects of pressure-induced compaction of microvoids and closure of cracks on the power conversion efficiency (PCEs) and stability of formamidinium-rich PSCs. A range of mechanical pressures was applied to the PSCs to reduce pre-existing grain-boundary voids and interfacial cracks within the devices. The PCEs of the PSCs increased from ~19.5% to ~ 23.5% for applied pressures between ~ (0 – 7) MPa. Unlaminated device stability increased by 33%, falling to 80% of initial PCE in 1800 hrs without compression, as compared to 2400 hrs with compression. The implications of this study are discussed in light of possible future manufacturing processes.

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Section: Moderate Pressure Lowers Defect Densitymentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Pressure-Induced Void and Crack Closure Improves the Photoconversion Efficiency and Stability of Perovskite Solar Cells

Oyewole

Agyei‐Tuffour

et al. 2020

Preprint

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“…The study equally observed that productivity is very important for Nigeria ports growth. To a very large Oyewole et al(2020) extent the findings discovered that cargo throughputs are positively affected by the operations of Nigerian sea-ports. The study further observed that the quality of interaction between staff and customers become positive for the growth of cargo throughputs in Nigerian sea port.…”

Section: Discussion Of Findingsmentioning

confidence: 98%

“…DHL/Cisco (2015) defined resources as stocks of available factors that are owned or controlled by the firm. Based on previous studies; ICT resources in this study are defined Oyewole et al(2020) as a multidimensional term which integrates software and hardware which enhance telecommunication functions. These infrastructure (application, data, server and network), ICT personnel (people who posed technical know-how), ICT capital (cost of implementing and running ICT in an organization).…”

Section: Resource Based Theorymentioning

confidence: 99%

“…Related inefficiencies, such as trade procedures, business and regulatory practices and constraints, or the insufficient availability and use of information and communication technologies (ICT) contribute to these costs. In terms of paperwork, there may be up to around 200 interactions involving documentation along the supply chain, and the shipper and consignee may deal with Oyewole et al(2020) as much as 20-30 entities to arrange a shipment [6,7] (Porter/ Lloyd's List, 2017). Many of these interactions are timeconsuming and often still take place via phone, fax or email.…”

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confidence: 99%

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Influence of work automation on the performance of nigerian ports

Oyewole

Olufemi

2020

J.M.S

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The study examined the influence of work automation on the performance of Nigeria ports. The study population was the entire sea-ports in Nigeria. In line with the purpose of study, the study adopted the survey/cross sectional approach. The major research instrument used collect data was the questionnaire. Thirty (30) copies of questionnaire were distributed to the respondents from the six major sea-ports in Nigeria. The respondents were department heads and senior port managers. Work automation was used as the independent variable of the study and measures of port performances were productivity and the throughput level of the sea-port. Two hypotheses were developed and tested to determine the extent of the relationship between the study variables. Pearson product moment analysis was used to test the stated hypotheses with the aid of statistical package for the social sciences (SPSS 22.0). The findings of the study revealed that to a very large extent, work automations are often used as key performance indicators (KPI) in Nigeria port. This is true of the system of administration of all port management authority in Nigeria. To a very large extent, the study observed that ports give room for the assessment of work automations. To a very large extent, the respondents were allowed to make variety of inputs on work automations in their various sea-ports. Staff of the ports have the requisite skills to give critical assessment on the issues of work automations. Conclusively, it is evident from the study that there is significant relationship between work automations and productivity in Nigerian ports and there is significant relationship between work automations and cargo throughputs in Nigerian ports. Therefore, port managers should improve on the service quality of their port by recommending improve work automation of the port activities in such a manner that will aid the effective performances of the port operations.

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Strain Effects on Flexible Perovskite Solar Cells

Liang,

Yang,

Xia

et al. 2023

Advanced Science

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Flexible perovskite solar cells (f‐PSCs) as a promising power source have grabbed surging attention from academia and industry specialists by integrating with different wearable and portable electronics. With the development of low‐temperature solution preparation technology and the application of different engineering strategies, the power conversion efficiency of f‐PSCs has approached 24%. Due to the inherent properties and application scenarios of f‐PSCs, the study of strain in these devices is recognized as one of the key factors in obtaining ideal devices and promoting commercialization. The strains mainly from the change of bond and lattice volume can promote phase transformation, induce decomposition of perovskite film, decrease mechanical stability, etc. However, the effect of strain on the performance of f‐PSCs has not been systematically summarized yet. Herein, the sources of strain, evaluation methods, impacts on f‐PSCs, and the engineering strategies to modulate strain are summarized. Furthermore, the problems and future challenges in this regard are raised, and solutions and outlooks are offered. This review is dedicated to summarizing and enhancing the research into the strain of f‐PSCs to provide some new insights that can further improve the optoelectronic performance and stability of flexible devices.

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Pressure-Assisted Fabrication of Perovskite Solar Cells

Cited by 41 publications

References 42 publications

Pressure-Induced Void and Crack Closure Improves the Photoconversion Efficiency and Stability of Perovskite Solar Cells

Pressure-Induced Void and Crack Closure Improves the Photoconversion Efficiency and Stability of Perovskite Solar Cells

Influence of work automation on the performance of nigerian ports

Strain Effects on Flexible Perovskite Solar Cells

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