Honeycomb Structure on Multi-crystalline Silicon Al-BSF Solar Cell With 17.8% Efficiency

Volk, Anne-Kristin; Tucher, Nico; Seiffe, J.; Hauser, Hubert; Zimmer, Martin; Bläsi, Bénédikt; Hofmann, M.; Rentsch, J.

doi:10.1109/jphotov.2015.2402757

Cited by 29 publications

(9 citation statements)

References 18 publications

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“…The gain in optical performance led to an enhancement in the short-circuit current density j sc of up to 2.5 mA∕cm 2 (from 35.0 to 37.50 mA∕cm 2 ) of honeycomb-textured compared to isotextured solar cells on multicrystalline material. 17 This is evidence for a relative increase in optical efficiency of 7%. Furthermore, a gain in overall conversion efficiency of 0.5% absolute was achieved on large area 156 × 156 mm 2 solar cells using high-throughput pilot line equipment and an aluminum-back surface field (Al-BSF) cell architecture (efficiency of honeycombtextured cell 17.8%).…”

Section: Honeycomb Texturing Of Multicrystalline Siliconmentioning

confidence: 91%

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Development of nanoimprint processes for photovoltaic applications

Hauser

Tucher

Tokai

et al. 2015

J. Micro/Nanolith. MEMS MOEMS

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Abstract. Due to its high resolution and applicability for large area patterning, nanoimprint lithography (NIL) is a promising technology for photovoltaic (PV) applications. However, a successful industrial application of NIL processes is only possible if large-area processing on thin, brittle, and potentially rough substrates can be achieved in a high-throughput process. The development of NIL processes using the SmartNIL technology from EV Group with a focus on PV applications is described. The authors applied this tooling to realize a honeycomb texture (8 μm period) on the front side of multicrystalline silicon solar cells, leading to an improvement in optical efficiency of 7% relative and a total efficiency gain of 0.5% absolute compared to the industrial standard texture (isotexture). On the rear side of monocrystalline silicon solar cells, the authors realized diffraction gratings to make use of light trapping effects. An absorption enhancement of up to 35% absolute at a wavelength of 1100 nm is demonstrated. Furthermore, photolithography was combined with NIL processes to introduce features for metal contacts into honeycomb master structures, which were initially realized using interference lithography. As a final application, the authors investigated the realization of very fine contact fingers with prismatic shape in order to minimize reflection losses.

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Section: Honeycomb Texturing Of Multicrystalline Siliconmentioning

confidence: 91%

“…Details on the subsequent solar cell processing as well as the solar cell architecture are given in Ref. 17.…”

Section: Honeycomb Texturing Of Multicrystalline Siliconmentioning

confidence: 99%

Development of nanoimprint processes for photovoltaic applications

Hauser

Tucher

Tokai

et al. 2015

J. Micro/Nanolith. MEMS MOEMS

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“…The basic process chain for the realization of the honeycomb texture with the processes of interference lithography, NIL and plasma etching is described thoroughly in [5]. In the following, the process chain is described briefly and recent results published in [29] are summarized. We used three beam interference lithography to originate large area (25x25 cm²) master structures having a hexagonal symmetry and a pitch of 8 µm.…”

Section: Solar Cell Applicationsmentioning

confidence: 99%

“…These values are well below the ones for the isotexture, which is the benchmark on mc-Si, and even superior to pyramidal textures on monocrystalline silicon as they are described above. Mc-Si solar cells were fabricated using screen printing processes and an aluminium back-surface-field (Al-BSF) cell structure as described in [29]. The optical gain was also demonstrated on device level, where the better optical performance is transferred to a gain in short circuit current density (J sc ) of 1.…”

Section: Solar Cell Applicationsmentioning

confidence: 99%

Large area patterning using interference and nanoimprint lithography

et al. 2016

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Interference lithography (IL) is the best suited technology for the origination of large area master structures with high resolution. In prior works, we seamlessly pattern areas of up to 1.2 x 1.2 m2 with periodic features, i.e. a diffraction grating with a period in the micron range. For this process we use an argon ion laser emitting at 363.8 nm. Thus, feasible periods are in the range of 100 μm to 200 nm. Edge-defined techniques or also called (self-aligned) double patterning processes can be used to double the spatial frequency of such structures. This way, we aim to reduce achievable periods further down to 100 nm. In order to replicate master structures, we make use of nanoimprint lithography (NIL) processes. In this work, we present results using IL as mastering and NIL as replication technology in the fields of photovoltaics as well as display and lighting applications. In photovoltaics different concepts like the micron-scale patterning of the front side as well as the realization of rear side diffraction gratings are presented. The benefit for each is shown on final device level. In the context of display and lighting applications, we realized various structures ranging from designed, symmetric or asymmetric, diffusers, antireflective and/or antiglare structures, polarization optical elements (wire grid polarizers), light guidance and light outcoupling structures

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“…[4][5][6] Two major components in this respect are textured front surface and back reflector. [27][28][29][30][31][32][33] As the texturing of the glass or the TCO can enhance the light trapping, so it can be assumed that a highly textured front surface may result in a better light trapping. [9][10][11][12][13][14] The plasmonic effect of the Ag nanoparticle 15, 16 was also reported in this respect.…”

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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Honeycomb Structure on Multi-crystalline Silicon Al-BSF Solar Cell With 17.8% Efficiency

Cited by 29 publications

References 18 publications

Development of nanoimprint processes for photovoltaic applications

Development of nanoimprint processes for photovoltaic applications

Large area patterning using interference and nanoimprint lithography

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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