Enhanced Light Absorption by Facile Patterning of Nano-Grating on Mesoporous TiO2 Photoelectrode for Cesium Lead Halide Perovskite Solar Cells

Kim, Kang-Pil; Kim, Wook Hyun; Kwon, Soo Min; Kim, Jun Yong; Do, Yun Seon; Woo, Sung-Ho

doi:10.3390/nano11051233

Cited by 6 publications

(3 citation statements)

References 41 publications

(49 reference statements)

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“…The scattering mechanisms of nano-texture structures are discussed for PSC in 41 , 42 . Soft lithography and nanoimprint lithography methods can be applied to fabricate nano-texture structures 46 – 48 .…”

Section: Resultsmentioning

confidence: 99%

Investigation of optical and electrical properties of novel 4T all perovskite tandem solar cell

Moradbeigi

Razaghi

2022

Sci Rep

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In this paper, a combined three-dimensional (3D) optical-electrical simulation of non-pb and flexible four-terminal (4T) all perovskite tandem solar cell (APTSC) is presented. In this structure, polyethylene terephthalate (PET) is used as substrates, while the top sub cell has a $$MAGeI_{3}$$ M A G e I 3 absorber layer and the bottom sub cell has a $$MASnI_{3}$$ M A S n I 3 absorber layer. This structure is used as a reference in this paper and the optical and electrical properties of it are investigated using the finite element method (FEM). It is shown that this structure has a total power conversion efficiency (PCE) of $$24.65\%$$ 24.65 % . Then, the elimination of the buffer layer and the addition of antireflection layer (ARL) strategies, as well as the use of periodic nano-texture patterns, are used to increase the reference structure’s total PCE. A free-buffer layer tandem device is presented to minimize the parasitic absorption. While the total PCE is improved by $$1.14\%$$ 1.14 % in this case, one of the fabrication steps is also eliminated. A plasma-polymer-fluorocarbon (PPFC) coating layer is suggested as ARL on the substrates of both sub cells to reduce reflection loss. With optimized these layers thickness, total PCE is increased by $$12.76\%$$ 12.76 % . Because the PPFC layer is hydrophobic, the top surface of two sub cells in this structure has self-cleaning characteristic. As a result, this device offers long-term moisture resistance. Finally, the best structure in terms of the maximum total PCE is presented by increasing optical path-length utilizing nano-photonic and nano-plasmonic structures. The final structure is offered as a 4T tandem solar cell (TSC) that is environmentally friendly, extremely flexible, and has self-cleaning capability, with a total PCE of $$30.14\%$$ 30.14 % , which is greater than the total PCE of the reference structure by $$22.27\%$$ 22.27 % .

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Section: Resultsmentioning

confidence: 99%

Investigation of optical and electrical properties of novel 4T all perovskite tandem solar cell

Moradbeigi

Razaghi

2022

Sci Rep

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“…In addition, if the angle of the reflected/diffracted light is greater than the critical angle, it causes a total internal reflection due to a decrease in the value of the refractive index of the TiO 2 layer to air (refractive index of TiO 2 (≈2.1), FTO (≈1.9), Glass (≈1.5), Air (=1.0)). The light is then reflected towards the mp-TiO 2 , and thus the transmittance to the perovskite layers increases [52]. Considering the perovskite materials, whose absorbance wavelength varies from 300 nm to 800 nm, the increment in transmittance of the nanopatterned mp-TiO 2 thin-film layer affects the J sc , V oc , ff, and the ECE of perovskite solar cells.…”

Section: Transmittance Data Of Perovskite Solar Cells With a Nanopatterned Mesoporous Tio2 (Mp-tio2) Thin-film Layermentioning

confidence: 99%

Optimizing the Aspect Ratio of Nanopatterned Mesoporous TiO2 Thin-Film Layer to Improve Energy Conversion Efficiency of Perovskite Solar Cells

Yang

Chuquer

Han

et al. 2021

IJMS

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The energy conversion efficiency (ECE) (η), current density (Jsc), open-circuit voltage (Voc), and fill factor (ff) of perovskite solar cells were studied by using the transmittance of a nanopatterned mesoporous TiO2 (mp-TiO2) thin-film layer. To improve the ECE of perovskite solar cells, a mp-TiO2 thin-film layer was prepared to be used as an electron transport layer (ETL) via the nanoimprinting method for nanopatterning, which was controlled by the aspect ratio. The nanopatterned mp-TiO2 thin-film layer had a uniform and well-designed structure, and the diameter of nanopatterning was 280 nm. The aspect ratio was controlled at the depths of 75, 97, 127, and 167 nm, and the perovskite solar cell was fabricated with different depths. The ECE of the perovskite solar cells with the nanopatterned mp-TiO2 thin-film layer was 14.50%, 15.30%, 15.83%, or 14.24%, which is higher than that of a non-nanopatterned mp-TiO2 thin-film layer (14.07%). The enhancement of ECE was attributed to the transmittance of the nanopatterned mp-TiO2 thin-film layer that is due to the improvement of the electron generation. As a result, better electron generation affected the electron density, and Jsc increased the Voc, and ff of perovskite solar cells.

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“…Since Honda and Fujishima reported photoelectrolysis photoelectrodes without an external power source in 1972 [ 1 ], TiO 2 has been drawing substantial attention, and many studies have been conducted to apply TiO 2 to various industrial fields, such as sensors [ 2 , 3 , 4 , 5 ], drug delivery systems [ 6 , 7 , 8 ], photocatalysts [ 9 , 10 , 11 , 12 ], and photoelectrodes [ 13 , 14 , 15 ]. TiO 2 has many attractive properties; among them, non-toxicity, strong durability, and excellent chemical stability are regarded as suitable photocatalyst properties for water purification.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Photocatalytic Properties of Electrospun Fe-Doped TiO2 Nanofibers Using Polyvinyl Pyrrolidone Precursors

Kim

Yoon

et al. 2021

Polymers

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For the removal of pollutants, a modified TiO2 photocatalyst is attracting attention. Fe-doped TiO2 nanofibers were prepared through a combination of electrospinning and calcination. Morphological characterization of the sample was conducted using field-emission scanning electron and transmission electron microscopy. The crystal structure of each sample was analyzed using high-resolution transmission electron microscopy, selected area electron diffraction, and Fast Fourier Transform imaging. The average diameter of the Fe-doped TiO2 nanofibers was measured to be 161.5 nm and that of the pure TiO2 nanofibers was 181.5 nm. The crystal phase when heat treated at 350 °C was anatase for TiO2 nanofibers and rutile for Fe-doped TiO2 nanofibers. The crystal phase of the TiO2 matrix was easily transitioned to rutile by Fe-doping. The photocatalytic performance of each sample was compared via the photodegradation of methylene blue and acid orange 7 under ultraviolet and visible light irradiation. In the Fe-doped TiO2 nanofibers, photodegradation rates of 38.3% and 27.9% were measured under UV irradiation and visible light, respectively. Although other catalysts were not activated, the photodegradation rate in the Fe-doped TiO2 nanofibers was 9.6% using acid orange 7 and visible light. For improved photocatalytic activity, it is necessary to study the concentration control of the Fe dopant.

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Enhanced Light Absorption by Facile Patterning of Nano-Grating on Mesoporous TiO2 Photoelectrode for Cesium Lead Halide Perovskite Solar Cells

Cited by 6 publications

References 41 publications

Investigation of optical and electrical properties of novel 4T all perovskite tandem solar cell

Investigation of optical and electrical properties of novel 4T all perovskite tandem solar cell

Optimizing the Aspect Ratio of Nanopatterned Mesoporous TiO2 Thin-Film Layer to Improve Energy Conversion Efficiency of Perovskite Solar Cells

Fabrication and Photocatalytic Properties of Electrospun Fe-Doped TiO2 Nanofibers Using Polyvinyl Pyrrolidone Precursors

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