Effect of light trapping in an amorphous silicon solar cell

Iftiquar, S.M.; Jung, Juyeon; Park, Hyeongsik; Cho, Jaehyun; Shin, Chonghoon; Park, Jinjoo; Jung, Junhee; Bong, Sungjae; Kim, Sunbo; Yi, Junsin

doi:10.1016/j.tsf.2015.02.037

Cited by 15 publications

(11 citation statements)

References 16 publications

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“…2 shows the diode simulation results (as continuous lines) in comparison to the J-V data points obtained from AFORS HET simulation. The details of the simulation parameters and cell characteristics can be found in [13]. A good match of the diode simulated J-V curves can be observed for all the cells, especially for the cell with active layer thickness (d ) of 100 nm.…”

Section: Resultsmentioning

confidence: 75%

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Low Reverse Saturation Current Density of Amorphous Silicon Solar Cell Due to Reduced Thickness of Active Layer

Iftiquar¹,

Yi²

2016

Journal of Electrical Engineering and Technology

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-One of the most important characteristic curves of a solar cell is its current density-voltage (J-V) curve under AM1.5G insolation. Solar cell can be considered as a semiconductor diode, so a diode equivalent model was used to estimate its parameters from the J-V curve by numerical simulation. Active layer plays an important role in operation of a solar cell. We investigated the effect thicknesses and defect densities (N d ) of the active layer on the J-V curve. When the active layer thickness was varied (for N d = 8×10 17 cm -3 ) from 800 nm to 100 nm, the reverse saturation current density (J o ) changed from 3.56×10 -5 A/cm 2 to 9.62×10 -11 A/cm 2 and its ideality factor (n) changed from 5.28 to 2.02. For a reduced defect density (N d = 4×10 15 cm -3 ), the n remained within 1.45≤n≤1.92 for the same thickness range. A small increase in shunt resistance and almost no change in series resistance were observed in these cells. The low reverse saturation current density (J o = 9.62×10 -11 A/cm 2 ) and diode ideality factor (n = 2.02 or 1.45) were observed for amorphous silicon based solar cell with 100 nm thick active layer.

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Section: Resultsmentioning

confidence: 75%

“…In order to have a better understanding on these parameters, we use AFORS HET simulation results of the J-V curves, as reported in [13]. Fig.…”

Section: Resultsmentioning

confidence: 99%

Low Reverse Saturation Current Density of Amorphous Silicon Solar Cell Due to Reduced Thickness of Active Layer

Iftiquar¹,

Yi²

2016

Journal of Electrical Engineering and Technology

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“…Our model support the ideas reported in Refs. . The SEM images in Figures b and d suggest an idea about proportional increase in the dimensions of the pyramid‐like etched pits.…”

Section: Discussionmentioning

confidence: 82%

“…Considering the well known fact that the reflectance of rough surface is clearly lower than that of the flat one various approaches were used for the modification of the surface morphology. It was proved by the experiments that the light trapping can be obtained in the specific formations on the solid surfaces, namely wet chemical etched pits and pillars, amorphous Si layer . Intensive studies of the substrate texturing resulted in so called black silicon surface that can be produced by various methods reviewed in Ref.…”

Section: Introductionmentioning

confidence: 99%

Minimization of Optical Reflectance by Copper Assisted Etching of Crystalline Silicon Surface

Treideris

Rėza

Kamarauskas

et al. 2018

Physica Status Solidi (a)

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Reduction of the optical reflectance to an absolute minimum by the metalassisted chemical etching (MACE) is investigated for the p-type crystalline silicon (100) plane wafers. The amount of the Cu additive and the composition of the etching solution identified by the proportion HF/(HF þ H 2 O 2 ) are the main variable parameters controlling the one step MACE. Pyramid like structures are produced on the surfaces. An influence of the variables on the surface topography and the related optical reflectance spectra is studied by measuring the spectra in the interval of the wavelengths from 400 to 1400 nm. Presence of a minimum that limits a reduction of the optical reflectance by the maskless micro-texturing of a smooth surface of a silicon wafer is experimentally demonstrated. The crucial stage in the etching is identified by the relative depth of the etched dips that results in the lowest reflectance. Under strictly controlled conditions the minimum reflectance is obtained using etchant with 0.08 M Cu-added. The lower and higher amounts of added Cu lead to an increase in the reflectance. The etching is explained by the localized microscopic galvanic cell model including the formation of the Cu-nanoparticles during the MACE and the changes in the reflectance are related to an enlargement of the etched pyramids.

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“…Another advantage of the a-Si:H material is that its optoelectronic properties can be altered by suitably varying deposition conditions. [4][5][6] Two major components in this respect are textured front surface and back reflector. There are two possible ways to enhance light absorption-one is to prepare amorphous silicon material that can have higher optical absorption, while the other is to design the solar cell so that the unabsorbed light is kept trapped for further absorption.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of honeycomb textured glass substrate and nanotexturing of zinc oxide front electrode for its application in high efficiency thin film amorphous silicon solar cell

et al. 2017

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Fabrication of honeycomb textured glass substrate and nanotexturing of zinc oxide front electrode for its application in high efficiency thin film amorphous silicon solar cell," Abstract. A significant part of broad band sunlight remains unabsorbed in a simple structured amorphous silicon solar cell. This absorption can be enhanced by adopting a light-trapping scheme with the help of a textured front surface and back reflector. For this purpose, honeycomb-type texture was fabricated on a glass surface by chemical etching. A 3 μm × 3 μm honeycomb patterned optical-mask was used to create an image-pattern of an etch-mask on the glass surfaces. We used 0.5% hydrofluoric acid (HF) as an etchant solution with an optimized etching time ranging between 25 and 28 min. This single textured glass shows an enhancement in diffused transmission of light. In solar cell application, a 630-nm-thick Al-doped ZnO (AZO) layer was deposited over the textured glass surface. An additional random etching was carried out on the AZO with 1% HF acid solution for 10 s. This results to a double textured AZO superstrate on which solar cells were fabricated. The solar cells show higher short circuit current density to 17.2 mA∕cm 2 . Finally, we obtained photovoltaic conversion efficiency of an optimized solar cell as 10.75% (with the corresponding J sc as 17.03 mA∕cm 2 ). Downloaded From: http://photonicsforenergy.spiedigitallibrary.org/pdfaccess.ashx?url=/data/journals/photoe/936171/ on 04/23/2017 Terms of Use: http://spiedigitallibrary.org/s Park et al.: Fabrication of honeycomb textured glass substrate and nanotexturing. Downloaded From: http://photonicsforenergy.spiedigitallibrary.org/pdfaccess.ashx?url=/data/journals/photoe/936171/ on 04/23/2017 Terms of Use: http://spiedigitallibrary.org/s Park et al.: Fabrication of honeycomb textured glass substrate and nanotexturing. Downloaded From: http://photonicsforenergy.spiedigitallibrary.org/pdfaccess.ashx?url=/data/journals/photoe/936171/ on 04/23/2017 Terms of Use: http://spiedigitallibrary.org/s Park et al.: Fabrication of honeycomb textured glass substrate and nanotexturing. Downloaded From: http://photonicsforenergy.spiedigitallibrary.org/pdfaccess.ashx?url=/data/journals/photoe/936171/ on 04/23/2017 Terms of Use: http://spiedigitallibrary.org/s Park et al.: Fabrication of honeycomb textured glass substrate and nanotexturing. Downloaded From: http://photonicsforenergy.spiedigitallibrary.org/pdfaccess.ashx?url=/data/journals/photoe/936171/ on 04/23/2017 Terms of Use: http://spiedigitallibrary.org/s Park et al.: Fabrication of honeycomb textured glass substrate and nanotexturing. Downloaded From: http://photonicsforenergy.spiedigitallibrary.org/pdfaccess.ashx?url=/data/journals/photoe/936171/ on 04/23/2017 Terms of Use: http://spiedigitallibrary.org/s Park et al.: Fabrication of honeycomb textured glass substrate and nanotexturing. Downloaded From: http://photonicsforenergy.spiedigitallibrary.org/pdfaccess.ashx?url=/data/journals/photoe/936171/ on 04/23/2017 Terms of Use: http://spiedigital...

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Effect of light trapping in an amorphous silicon solar cell

Cited by 15 publications

References 16 publications

Low Reverse Saturation Current Density of Amorphous Silicon Solar Cell Due to Reduced Thickness of Active Layer

Low Reverse Saturation Current Density of Amorphous Silicon Solar Cell Due to Reduced Thickness of Active Layer

Minimization of Optical Reflectance by Copper Assisted Etching of Crystalline Silicon Surface

Fabrication of honeycomb textured glass substrate and nanotexturing of zinc oxide front electrode for its application in high efficiency thin film amorphous silicon solar cell

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