Efficient fully roll-to-roll coated encapsulated organic solar module for indoor applications

Miranda, Bárbara H.S.; Corrêa, Luiza de Queiroz; Soares, Gabriela A.; Martins, Juliana Luiza da Silva; Lopes, Paulo L.; Vilela, Maria L.; Rodrigues, Jair; Cunha, Thainá G.; Vilaça, Rodrigo; Castro‐Hermosa, Sergio; Wouk, Luana; Bagnis, Diego

doi:10.1016/j.solener.2021.03.025

Cited by 22 publications

(22 citation statements)

References 39 publications

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“…[ 8 ] However, in all these examples, chloroform (CF) was used as a solvent for the blend layer and the cell architecture incorporated an ITO electrode. Miranda et al [ 9 ] and Liao et al [ 10 ] presented results on organic solar modules with the blend layer blade coated from o ‐xylene‐based solutions on ITO‐based cell stacks. The first used a fullerene‐based ink and achieved up to 15% efficiency on a flexible 7.2 cm 2 active area module at 1000 lux with a ww‐LED.…”

Section: Introductionmentioning

confidence: 99%

ITO‐Free Indoor OPV Modules from Nonhalogenated Solvents

et al. 2022

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Section: Introductionmentioning

confidence: 99%

ITO‐Free Indoor OPV Modules from Nonhalogenated Solvents

et al. 2022

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“…This is one advantage of using the c-Si solar cell as an IPV, as other PV types show a reduction in the electrical output with an increase in cell size. [21,22] In addition, the power density increased by 70% using the 3-D c-Si solar cell as a tetrahedron unit (63 µW cm −2 ) consisting of three c-Si solar cells connected in series from a flat cell (37 µW cm −2 ) under 1,496 lx; four scattering sheets were used as the light source, similar to the lighting that in a workshop or showroom.…”

Section: Introductionmentioning

confidence: 99%

“…As such, indoor photovoltaics (IPV) such as amorphous silicon (a-Si) solar cells, dyesensitized solar cells (DSSCs), perovskite solar cells (PSCs), and organic photovoltaics (OPVs) are often used indoors, as these types of PVs have the necessary absorption spectra and high energy conversion efficiency under weak lighting conditions. [10,[18][19][20][21][22] In contrast, the c-Si solar cell has low electrical power output due to its broad absorption spectrum and linearly decreasing power output under reduced light intensity. [23][24][25] However, as large-sized cells or modules, most of the abovementioned PV types have degradation problems, with the exception of the c-Si solar cell.…”

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confidence: 99%

Application of a c‐Si Solar Cell with a Three‐Dimensional Structure to Indoor Photovoltaics

Sim

Yun

Lee

et al. 2022

Adv Materials Technologies

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are considerably weaker sources of illumination compared to sunlight.Unfortunately, most PV devices are optimized for outdoor use, having the ability to generate electric power on the order of watts to gigawatts (e.g., power plants) with sunlight exposure. [14] The crystalline silicon (c-Si) solar cell has been widely used under sunlight, as it is economical, expandable, and capable of being mass-produced. [15][16][17] However, artificial light sources have low light intensity and a narrow spectrum, residing mostly in the visible light regime (400-700 nm). As such, indoor photovoltaics (IPV) such as amorphous silicon (a-Si) solar cells, dyesensitized solar cells (DSSCs), perovskite solar cells (PSCs), and organic photovoltaics (OPVs) are often used indoors, as these types of PVs have the necessary absorption spectra and high energy conversion efficiency under weak lighting conditions. [10,[18][19][20][21][22] In contrast, the c-Si solar cell has low electrical power output due to its broad absorption spectrum and linearly decreasing power output under reduced light intensity. [23][24][25] However, as large-sized cells or modules, most of the abovementioned PV types have degradation problems, with the exception of the c-Si solar cell. Despite degradation under ambient light, the c-Si solar cell has the advantages of high durability and expandability for IPV applications. [26][27][28] In this study, we attempted to overcome the low energy conversion characteristics of a c-Si solar cell under weak lighting conditions, using a three-dimensional (3-D) configuration to acquire more indirect light, as well as direct light for increased power generation from the PV device. Compared to sunlight, artificial light sources, such as indoor lighting, tend to be fairly weak as the light is more diffuse and scattered. If the artificial light sources are installed periodically, as in an office setting, for example, the indirect light portion is increased. Incident daylight enters through windows at various angles (angled incident light). The energy generated from direct light is related to the occupied area assuming that the power density of the cells is constant. However, the total surface area is the most important factor when using indirect light. Here, we introduce a 3-D c-Si solar cell configuration to increase the total surface area for light accumulation from various angles, with a similar footprint to its flat cell counterpart.To fabricate the 3-D solar cell, we replaced the window glass, the ethylene vinyl acetate (EVA) film, and the metal frame of a conventional module with polydimethylsiloxane (PDMS) and an epoxy back frame. In our previous study, we demonstrated As individual photovoltaic (PV) power sources for indoor conditions, various types of solar cells including organic, perovskite, and dye-sensitized devices, have been used because they provide better performance under weak lighting conditions; however, they are limited in terms of durability and applicability to larger-sized cells and modules. Crystalline sili...

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“…The development of renewable energy resources, especially photovoltaics, is attracting extensive attention as there has been a rapid increase in global energy consumption in recent years [1,2]. Organic photovoltaics (OPVs) represent an attractive class of photovoltaic materials that are better than traditional silicon-based and inorganic thin-film solar cells [3].…”

Section: Introductionmentioning

confidence: 99%

Surface Treatment of Flexible Barrier Film for Improved Stability of Organic Photovoltaic Mini Modules

Silva¹,

Miranda²,

Vilela³

et al. 2022

JEPT

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The lifetime and stability of organic photovoltaics (OPVs) are the key factors that influence the technology used to scale up and commercialize OPVs. High-performing and reliable devices are used to fabricate the devices of choice. Materials and methods that can be used to prevent the degradation of organic materials, enabling better OPV applications, are being increasingly researched in recent years. Herein, we present the surface modification process of a commercial, flexible barrier film based on polyethylene terephthalate (PET). A sol-gel deposition method was used to modify the surface. Two scalable coating techniques, spray- and bar-coating, were investigated as the processing methods. Treated films were optically, morphologically, and topologically characterized. The modification of the barrier film surface increased the surface hydrophobicity of the bar-coated and spray-coated treated films. This was validated by the contact angle measurements. OPV roll-to-roll (R2R) mini-modules with 4.2% power conversion efficiency were fabricated and encapsulated with the treated films. The lifetime and stability were assessed by conducting accelerated aging tests based on the ISOS-D-3 protocol. The spray-coating technique provided a more stable layer than the bar-coating technique, and the lifetime of the OPV modules encapsulated in spray-coated treated barrier films was increased. Surface modification has been demonstrated to be a promising approach for not only improving the barrier film properties (resulting in the improved lifetimes of the modules) but also reducing the extents of reflectance losses in the OPV modules post encapsulation.

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Efficient fully roll-to-roll coated encapsulated organic solar module for indoor applications

Cited by 22 publications

References 39 publications

ITO‐Free Indoor OPV Modules from Nonhalogenated Solvents

ITO‐Free Indoor OPV Modules from Nonhalogenated Solvents

Application of a c‐Si Solar Cell with a Three‐Dimensional Structure to Indoor Photovoltaics

Surface Treatment of Flexible Barrier Film for Improved Stability of Organic Photovoltaic Mini Modules

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