Adhesion in flexible organic and hybrid organic/inorganic light emitting device and solar cells

Yu, Donghong; Oyewole, Oluwaseun K.; Kwabi, David G.; Tong, T.; Anye, Vitalis C.; Asare, Joseph; Rwenyagila, E. R.; Fashina, Adebayo Adeboye; Akogwu, Onobu; Du, Jinglei; Soboyejo, W. O.

doi:10.1063/1.4892393

Cited by 25 publications

(25 citation statements)

References 31 publications

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“…Therefore, overall performances of BHJ OSCs depend significantly on the exciton/polaron dissociation, separation, recombination, and collection of charge carriers at the respective electrodes [17]. This suggests the importance of a wellengineered interfacial adhesion [64] and contacts for the design of organic PV systems [65,84,89]. These issues are investigated largely by experiments using BHJ OSC structures with photoactive organic baseline materials that use polymerfullerene [83], polymer-polymer [46,90], and polymernanoparticle blends [91] or polymer-inorganic hybrids [36].…”

Section: Organic Bhj Solar Cell Operation Principlesmentioning

confidence: 99%

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A Review of Organic Photovoltaic Energy Source and Its Technological Designs

Rwenyagila

2017

International Journal of Photoenergy

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This study reviews and describes some of the existing research and mechanisms of operation of organic photovoltaic (OPV) cells. Introduced first are problems that exist with traditional fossil fuels that result in most of the world energy challenges such as environmental pollution. This is followed by the description of baseline organic solar cell (OSC) structures and materials. Then, some of the existing modelling approaches that have implemented either a one-or a two-dimensional drift-diffusion model to examine OSC structures are reviewed, and their reproducibility is examined. Both experimental and modelling approaches reviewed are particularly important for more and better designed research to probe practical procedural problems associated with OSCs that hinder the commercialization of OPV technology.

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Section: Organic Bhj Solar Cell Operation Principlesmentioning

confidence: 99%

“…These can be prepared on top of rigid or flexible substrates [64]. However, PSS (poly(styrenesulfonate)) is acidic and hence a strongly hydrophilic material [65].…”

Section: Advances In Opv Technology and Designsmentioning

confidence: 99%

A Review of Organic Photovoltaic Energy Source and Its Technological Designs

Rwenyagila

2017

International Journal of Photoenergy

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“…2,27,33,[43][44][45] Prior measurements of adhesion energies are presented Table II and Figure 8. These show that the computed energy release rates (Figure 8) can exceed the measured adhesion energies (Figure 7) obtained in the interfaces that are present in OLED structures.…”

Section: Modeling Of Pull-off As a Fracture Processmentioning

confidence: 99%

“…Hence, if the geometry and Young's modulus of the film are known, the interfacial adhesion energy between the cold-welded films can, therefore, be determined using force microscopy 33 or interfacial fracture mechanics methods, while the film Young's modulus can be obtained from nano-indentation. 23,34 In the case of non-rigid particles, the applied pressure will also induce the deformation of the trapped particles, as shown schematically in Figures 2(a)-2(c) for stiff, semi-rigid and compliant particles, respectively.…”

Section: A Surface Contact Modelmentioning

confidence: 99%

Cold welding of organic light emitting diode: Interfacial and contact models

et al. 2016

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This paper presents the results of an analytical and computational study of the contacts and interfacial fracture associated with the cold welding of Organic Light Emitting diodes (OLEDs). The effects of impurities (within the possible interfaces) are explored for contacts and interfacial fracture between layers that are relevant to model OLEDs. The models are used to study the effects of adhesion, pressure, thin film layer thickness and dust particle modulus (between the contacting surfaces) on contact profiles around impurities between cold-welded thin films. The lift-off stage of thin films (during cold welding) is then modeled as an interfacial fracture process. A combination of adhesion and interfacial fracture theories is used to provide new insights for the design of improved contact and interfacial separation during cold welding. The implications of the results are discussed for the design and fabrication of cold welded OLED structures.

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“…The most significant failure in outdoor/field PVs systems are: delamination [23], junction box failure [17], frame breakage [17], cell cracks [24], [25], burn marks [17], potential induced degradation [17], and defective bypass diodes [17]. While on the other, the common failures in laboratory PVs cells include: Interfacial and contact failure [26], delamination [27,28], adhesion loss [29], contact degradation [26], crack due to bending and stretching of organic solar cells [26][27], [30] and cell cracks due to surface texturing [31][32]. Nevertheless, there is a need for more data on the failure, reliability and performance of PV systems that are deployed across the different terrestrial regions around the world.…”

Section: Introductionmentioning

confidence: 99%

A study on the reliability and performance of solar powered street lighting systems

et al. 2017

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This paper presents the results of a study on the reliability and performance of the solar-powered street lighting systems installed at the African University of Science and Technology (AUST) in Nigeria, a hot and humid environment. The technical performance of the systems was studied using the following performance indicators: system energy yield, capture loss, as well as the system performance ratio while the reliability of the systems was examined using a model developed from the findings from the maintenance and fault diagnosis of the systems. The model was used to predict the total failure and survival probability of the systems using the Weibull distribution. The performance evaluation during the monitored period (February 2012 to January 2015) indicated that the performance ratios of the systems vary from 70% to 89% and the energy yields of the systems ranging from 2.87 h/day to 5.57 h/day. The results from the reliability analysis also showed that when the stress concentration factor around the notch between the cable terminals in the charge controller increases, the charge controller will become overheated, which in turn affected other components of the systems. The implications of this study are also discussed for the design and development of future solar-powered street lighting systems.

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Adhesion in flexible organic and hybrid organic/inorganic light emitting device and solar cells

Cited by 25 publications

References 31 publications

A Review of Organic Photovoltaic Energy Source and Its Technological Designs

A Review of Organic Photovoltaic Energy Source and Its Technological Designs

Cold welding of organic light emitting diode: Interfacial and contact models

A study on the reliability and performance of solar powered street lighting systems

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