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

Hyeongsik Park; Sk Md Iftiquar; Myunghun Shin; Hyeongseok Kim; Junhee Jung; Sunbo Kim; Anh Huy Tuan Le; Youngkuk Kim; Duy Phong Pham; Jae-Seong Jeong; Junsin Yi

doi:10.1117/1.JPE.7.025502

21 April 2017 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

Hyeongsik Park, Sk Md Iftiquar, Myunghun Shin, Hyeongseok Kim, Junhee Jung, Sunbo Kim, Anh Huy Tuan Le, Youngkuk Kim, Duy Phong Pham, Jae-Seong Jeong, Junsin Yi

Author Affiliations +

Journal of Photonics for Energy, Vol. 7, Issue 2, 025502 (April 2017). https://doi.org/10.1117/1.JPE.7.025502

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/cm2. Finally, we obtained photovoltaic conversion efficiency of an optimized solar cell as 10.75% (with the corresponding Jsc as 17.03 mA/cm2).

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Hyeongsik Park, Sk Md Iftiquar, Myunghun Shin, Hyeongseok Kim, Junhee Jung, Sunbo Kim, Anh Huy Tuan Le, Youngkuk Kim, Duy Phong Pham, Jae-Seong Jeong, and Junsin Yi "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," Journal of Photonics for Energy 7(2), 025502 (21 April 2017). https://doi.org/10.1117/1.JPE.7.025502

Received: 16 November 2016; Accepted: 10 April 2017; Published: 21 April 2017

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