Fluorine doped tin oxide as an alternative of indium tin oxide for bottom electrode of semi-transparent organic photovoltaic devices

Way, Amirah; Luke, Joel; Evans, Anna; Li, Zhe; Kim, Jinhyun; Durrant, James R.; Lee, Harrison Ka Hin; Tsoi, Wing Chung

doi:10.1063/1.5104333

Cited by 76 publications

(40 citation statements)

References 22 publications

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“…A transparent electrode is necessary for the solar cells as it permits the arriving light to attain the photoactive layer. The transparent conductive oxides (TCO) like FTO is used well suited for this purpose due to its transparent and conductive nature [7]. Poly(3,4 ethylenedioxythiophene): polystyrene sulfonate (PEDOT: PSS) organic material has been used to as HTL owing to high transparency and conductivity (10 −4 to 10 −3 s/ cm), high mechanical flexibility [8] and fabrication at low temperature [4,5].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of MAPbI3 thin film and its application in C-Si/perovskite tandem solar cell

Jassim

Bakr

Mustafa³

2020

J Mater Sci: Mater Electron

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Silicon, polymer and dye sensitized have been increasing rapidly in thin film of solar cells. Recently, perovskite is proposed as alternative material in the fabrication of solar cells. In this study, methyl ammonium lead triiodide (MAPbI 3 , CH 3 NH 3 PbI 3) perovskite thin film was prepared by two-step process of spin coating. The preparation process of thin film is summarized by reaction between the methyl ammonium iodide (CH 3 NH 3 I) and lead iodide (PbI 2). The absorbent layer of the prepared perovskite solar cell is based on the MAPbI 3 (CH 3 NH 3 PbI 3) thin film. The conversion efficiency of p-n silicon solar cells can be improved by preparing tandem solar cells. The X-ray diffraction result of the MAPbI 3 perovskite film manifested that it is polycrystalline with tetragonal system having a crystallite size of about 40 nm. The absorption spectrum of perovskite film was recorded by Ultra Violet-Visible spectrophotometer. The energy band gap of the MAPbI 3 film calculated by Tauc's formula was ~ 1.51 eV. The field emission scanning electron microscope image of the MAPbI 3 film surface elucidated a cubic-like crystal structure and other irregular structures also. The atomic force microscope image and the distribution chart of the grains of the film displayed that the grain size was ~ 58.7 nm. The results demonstrated that the conversion efficiency for silicon, perovskite and tandem (silicon/perovskite) solar cells are 3%, 4.83% and 7.42%, respectively.

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Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of MAPbI3 thin film and its application in C-Si/perovskite tandem solar cell

Jassim

Bakr

Mustafa³

2020

J Mater Sci: Mater Electron

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“…[ 15–17 ] From the TCOs available, we selected indium doped tin oxide (ITO) coated glass because of its smooth surface and widespread use in optoelectronic devices. [ 18 ] A thin film of SU8 photoresist was spin casted on the ITO substrates followed by a soft nanoimprinting step with a prepatterned stamp. In brief, a polydimethylsiloxane (PDMS) mold was pressed against the SU8 layer heated at 90 °C, above its glass transition temperature.…”

Section: Resultsmentioning

confidence: 99%

Electrodeposited Negative Index Metamaterials with Visible and Near Infrared Response

Gómez‐Castaño

Garcia‐Pomar

Pérez

et al. 2020

Advanced Optical Materials

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by the geometry rather than the constituent materials, which led to the field of metamaterials. Over the last decades, metamaterials research has grown exponentially due to the exceptional possibilities that they offer to manipulate light. Examples of extraordinary properties include artificial chirality, [1] super absorption, [2] extraordinary optical transmission, [3] optical magnetism, [4] or negative refraction. [5] From the several reported structures for achieving negative index metamaterials (NIMs) at optical frequencies, the multilayer fishnet design stands out as the most promising architecture in terms of tunability, figure of merit (FOM), and strong negative values. [6] Its design lies on metal-insulator-metal (MIM) stacks drilled with a 2D periodic array of holes. When the metallic layers are close enough, the propagating surface plasmon polaritons (SPPs) at the internal interfaces overlap, leading to the excitation of so-called gap surface plasmons (GSPs). [7] In this situation, out-of-phase currents are generated in the metallic strips, inducing a magnetic dipole in the insulator layer. This artificial magnetism along with the electric response arising from the metallic layers are the source of the negative refractive index (RI). [8] In the recent years, there has been an increasing interest in the commercial applications of metamaterials. However, the implementation of these architectures in an actual device is not an easy task. Recent advances in nanofabrication have enabled the high-throughput and up scalable production of NIMs using patterning methods such as self-assembly [9-11] or nanoimprint lithography (NIL), [12,13] where the proper arrangement gave rise to negative index at optical frequencies. In particular, the inspiring works by Gao et al. [13] demonstrated large area metamaterials operating at visible and telecommunication frequencies using a subtractive lift-off process combined with metal evaporation and reactive ion etching. Despite the scalability of the patterning techniques used in these works, most of them involve several steps, make use of top-down expensive methods such as electron beam evaporation or implies transferring steps that can damage the structures. In terms of the absolute values achieved, there is still room for improvement for large area NIMs. A record value of −0.73 at 710 nm being the lowest negative refractive index achieved in the visible range with an scalable technique so far. [13] It is also worth noting that obtaining NIMs with a negligible angular Negative index metamaterials have revolutionized the field of photonics because of their unconventional electromagnetic properties absent in naturally occurring materials. It remains a challenge however, to achieve strong negative refractive index at optical frequencies over large areas in a device compatible fashion. In this work, a scalable method for the straightforward production of fishnet-like negative index metamaterials combining soft nanoimprinting and electrodeposition is reported. In four simple steps...

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“…To facilitate the transition between the active layer and the anode, an intermediate layer is introduced. The high hole mobility of the Hole Transport Layer (HTL) allows to holes to move towards the anode instead of the cathode [18]- [20]. These three layers are transparent in order to allow the light to penetrate to the active layer.…”

Section: Methodsmentioning

confidence: 99%

Finite Element Numeric Simulation of Organic Solar Cells with Gold Thin Film

Sciuto¹,

Coco²,

Gotleyb³

et al. 2020

Int. J. Adv. Sci. Eng. Inf. Technol.

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In this paper, we have explored the potential of organic solar cells with gold layers, simulating different geometries and comparing them with the experimental data obtained from the devices produced at the “optoelectronic organic devices laboratory at Ben Gurion University of the Negev, Israel.” Thin-film heterojunction solar devices are analyzed using a basic chemical technology of GLASS/ITO/PEDOT,PSS/P3HT, PCBM, and another type of nanostructure where the gold layer is added. A standard device is realized on top of a transparent substrate such as glass or flexible polymer Polyethylene Terephthalate (PET). The first layer is the anode, which is made of conductive material and is also transparent. In our case, the very common material Indium-Tin-Oxide (ITO) is used. To facilitate the transition between the active layer and the anode, an intermediate layer is introduced. Hole Transport Layer (HTL) 's high hole mobility allows holes to move towards the anode instead of the cathode. On top of these layers the organic active layer is constituted by a blend of two organic materials configuring a multiple junction morphology (Bulk Heterojunction or BHJ). In our case, two commonly organic materials [6,6]-Phenyl C61 Butyric acid Methyl ester and Poly(3-Hexylthiophene-2,5-diyl) (PCBM:P3HT) are used. The cathode on top organic active layer is made of highly conductive opaque metal, mostly Aluminum (Al). The finite-element method has been used to compute the electromagnetic field distributions. The results show that the model with the gold layer increases the electrical performance of organic solar cells.

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Fluorine doped tin oxide as an alternative of indium tin oxide for bottom electrode of semi-transparent organic photovoltaic devices

Cited by 76 publications

References 22 publications

Synthesis and characterization of MAPbI3 thin film and its application in C-Si/perovskite tandem solar cell

Synthesis and characterization of MAPbI3 thin film and its application in C-Si/perovskite tandem solar cell

Electrodeposited Negative Index Metamaterials with Visible and Near Infrared Response

Finite Element Numeric Simulation of Organic Solar Cells with Gold Thin Film

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