A detailed knowledge of the degradation mechanisms that occur in C 60 layers will aid in the development of more stable organic solar cells. Here, the impact of storage in air on the optical and electrical properties of C 60 is studied in thin films and in devices.
In addition to studying the effects of the crack on the solar cell, it is verified by the experiment that the solar cells behave as a capacitive circuit, and their capacitance increases when the cell gets cracked, getting higher as the crack becomes more serious.
The film stresses in the polymer films and metal electrodes of the solar cell following deposition of the PEDOT:PSS conducting polymer, BHJ and Ca/Al electrode layers were measured by the substrate curvature method using a laser scanning technique .
The film stresses in the polymer films and metal electrodes of P3HT:PCBM BHJ organic solar cells have been studied and quantified. Compressive biaxial stresses were measured in the PEDOT:PSS while tensile stresses were measured in the BHJ layer. The implication of the tensile film stresses on damage processes in the BHJ layer was explored.
Mechanical strain in principle affects the photovoltaic output of devices in several ways, from strain-evolved changes in alignment of chains, degree of crystallinity, and orientation of texture, to debonding, cohesive failure, and cracking, which dominate changes in the high-strain regime.
This paper begins by reviewing the mechanical properties—principally stiffness and brittleness—of pure films of organic semiconductors. It identifies several determinants of the mechanical properties, including molecular structures, polymorphism, and microstructure and texture.
The stresses that occur in the OPV thin polymer films and metal electrodes during fabrication or device operation provide the mechanical driving force for damage processes which include cohesive or adhesive failure , together with mechanical instabilities such as film buckling . They have also been reported to affect device performance .
A detailed knowledge of the degradation mechanisms that occur in C 60 layers will aid in the development of more stable organic solar cells. Here, the impact of storage in air on the optical and electrical properties of C 60 is studied in thin films and in devices.
Intrinsically stretchable organic solar cells (IS-OSCs) have been recently spotlighted for their omnidirectional stretchability, seamless integrability to any surface, and facile fabrication. Due to these attributes, IS-OSCs are ideal off-grid power sources, especially for wearable electronics in real-life.
Intrinsically stretchable organic solar cells (IS-OSCs) have been recently spotlighted for their omnidirectional stretchability, seamless integrability to any surface, and facile fabrication. Due to these attributes, IS-OSCs are …
Organic solar cells have been attracting considerable attention owing to their potential merit of low cost energy conversion. The power conversion efficiency (PCE) of organic solar cells has been increased up to 9.2% for a single junction configuration [1] and over 12% for a tandem structure [2].Due to limited charge carrier mobilities in organic materials, the …
The film stresses in the polymer films and metal electrodes of P3HT:PCBM BHJ organic solar cells have been studied and quantified. Compressive biaxial stresses were measured in the PEDOT:PSS while tensile stresses were measured in the BHJ layer. The implication of the tensile film stresses on damage processes in the BHJ layer was explored. …
An organic solar cell (OSC [1]) or plastic solar cell is a type of photovoltaic that uses organic electronics, a branch of electronics that deals with conductive organic polymers or small organic molecules, [2] for light absorption and charge transport to produce electricity from sunlight by the photovoltaic effect. Most organic photovoltaic cells are polymer solar cells. Fig. 2. Organic ...
Additionally, promising crack-onset strain (COS) values of 32.02% and 22.58% have been observed in pristine and blend films, respectively, striking a balance between …
The strain at which cracks appear in a film on an elastic substrate is often taken as a measure of the ductility of a thin film, but the so-called crack-onset strain is highly dependent on the …
Controlling the packing feature and film morphology of active layers is the precondition for achieving highly efficient organic solar cells (OSCs). The growth transition of donors and acceptors from solution to solid films plays an intrinsic role in shaping these features. In this study, two simple additives, cyanobenzene (CNB) and 1,4 ...
Mechanical strain in principle affects the photovoltaic output of devices in several ways, from strain-evolved changes in alignment of chains, degree of crystallinity, and orientation of texture, to debonding, cohesive failure, and cracking, which …
Intrinsically stretchable organic solar cells (IS-OSCs) have attracted great attention as a promising power source for wearable electronics. However, reconciling high power conversion efficiency (PCE), reasonable stretchability, …
The coupled effects of mechanical stresses on oxygen diffusion and reaction accelerated degradation mechanisms of the organic thin film systems, resulted in film cracking …
Numerous single-junction photovoltaic technologies, including silicon (Si), gallium arsenide (GaAs), copper indium gallium selenide (CIGS), organic photovoltaic (OPV), and perovskite solar cells (PSCs), are nearing their respective power conversion efficiency (PCE) thresholds. 1, 2, 3 Although single-junction PSCs have achieved a remarkable record PCE of …
Although both films show quenching of ITIC emission (>700 nm) corresponding to the absorption bleaching, there is a significant increase in the PBDB-T donor PL peak intensity in the unfiltered blend film. This is clear evidence of strong photoinduced phase separation between the PBDB-T donor and ITIC acceptor in the unfiltered BHJ ...
Controlling the packing feature and film morphology of active layers is the precondition for achieving highly efficient organic solar cells (OSCs). The growth transition of …
Consequently, a highly efficient GPT-LBL organic solar cell (OSC) with a power conversion efficiency (PCE) of 19.41% (certified 19.0%) was achieved. Noticeably, the large-area (1.03 cm 2) device for GPT-LBL OSCs yields a satisfactory PCE of 17.52% in open-air blade coating, which is one of the best values in green-solvent-processed OSCs. The ...
Additionally, promising crack-onset strain (COS) values of 32.02% and 22.58% have been observed in pristine and blend films, respectively, striking a balance between photovoltaic and mechanical properties. Notably, the PCE of the optimal ternary device based on PM6-Cl 0.8-b-D18-Cl 0.2-TCl also reached 19.57%.
A detailed knowledge of the degradation mechanisms that occur in C 60 layers will aid in the development of more stable organic solar cells. Here, the impact of storage in air on the …
Our quantitative method to measure residual stresses in nanoscale polymer thin films and electrodes of organic solar cells will improve understanding of their effects on device performance and reliability. It will also enable identification of more effective processing routes that mitigate the detrimental effects of residual stress ...
The curious phenomenon of cracking in organic-inorganic halide perovskite (OIHP) thin films for solar cells during scanning electron microscopy (SEM) can be seen in literally thousands of ...
Organic solar cells, also known as organic photovoltaics (OPVs), have become widely recognized for their many promising qualities, such as: Ease of solution processability Tuneable electronic properties Possibilities for low temperature …
In an effort to address this issue, here we demonstrate that through-thickness cracks induced by bending-tension in thin films of the two prototypical OIHPs, methylammonium lead triiodide (MAPbI 3) and formamidinium lead triiodide (FAPbI 3), can be healed easily.
Although both films show quenching of ITIC emission (>700 nm) corresponding to the absorption bleaching, there is a significant increase in the PBDB-T donor PL peak …
A dynamic energy model is used to demonstrate that semitransparent organic solar cells (OSCs) can be employed on greenhouses to achieve net zero energy greenhouses in warm and moderate climates. Furthermore, it is shown that the reduction in sunlight entering the greenhouses is not as significant as the transmittance of the OSCs would suggest owing in …
Organic solar cells (OSCs) based on polymer donor and non-fullerene acceptor achieve power conversion efficiency (PCE) more than 19% but their poor absorption below 550 nm restricts the harvesting of high-energy photons. In contrast, wide bandgap all-inorganic perovskites limit the absorption of low-energy photons and cause serious below bandgap loss. …
Our quantitative method to measure residual stresses in nanoscale polymer thin films and electrodes of organic solar cells will improve understanding of their effects on device …
The strain at which cracks appear in a film on an elastic substrate is often taken as a measure of the ductility of a thin film, but the so-called crack-onset strain is highly dependent on the adhesion between the film and the substrate (poorly adhered films crack at smaller strains than well adhered films of the same modulus). 28 Adhesive 68 ...
The coupled effects of mechanical stresses on oxygen diffusion and reaction accelerated degradation mechanisms of the organic thin film systems, resulted in film cracking and delamination occurring at lower nominal strains in comparison with systems that had no diffusion-reaction mechanisms. These degradation mechanisms underscore ...
Mechanical strain in principle affects the photovoltaic output of devices in several ways, from strain-evolved changes in alignment of chains, degree of crystallinity, and orientation of texture, to debonding, cohesive failure, and cracking, which dominate changes in the high-strain regime.
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