@inproceedings{6f08e2557160422a89be8b2989218712,
title = "Angular Dependence of Textured Bifacial Silicon Heterojunction Solar Cells for High Latitudes",
abstract = "Bifacial photovoltaics at high latitudes can achieve up to 25-45% bifacial gain due to high-albedo snow cover and high proportion of diffuse light. We studied the angular performance of bifacial silicon heterojunction solar cells with various textures to understand high-latitude effects on optical losses. For cone and pyramid-patterned designs, external quantum efficiency decreases at high angles, primarily due to increased reflectivity, although longer path length through front-surface films also increases UV losses for all surface types. At 80° incidence and 25°C, a <7% reduction in short-circuit current due to change in external quantum efficiency is observed for random pyramid textured surfaces. Simulation is compared to measured external quantum efficiency for a silicon heterojunction cell, and similar trends are observed with increasing angle of incidence. A relative reduction of <1% in short-circuit current is also observed when moving from an air mass of 1.5 to 5 at high angles of incidence. These results will inform future solar heterojunction designs for this application and be applied to refine annual energy yield calculations.",
keywords = "air mass, amorphous silicon, angle of incidence, bifacial photovoltaics, heterojunction cell, indium-tin-oxide, photovoltaic cells, ray tracing, silicon solar cell, texture",
author = "Lewis, {Mandy R.} and Tonita, {Erin M.} and Valdivia, {Christopher E.} and Obhi, {Ras Jeevan K.} and Joswin Leslie and Bertoni, {Mariana I.} and Karin Hinzer",
note = "Funding Information: The authors would like to thank William Weigand and Zhengshan Yu for their assistance with sample fabrication at Arizona State University{\textquoteright}s Solar Power Lab. We acknowledge the support of the Natural Sciences and Engineering Research Council of Canada (NSERC), [NSERC CREATE 497981 and NSERC STPGP 521894]. Funding Information: Experimental work was partially supported by the Engineering Research Center Program of the National Science Foundation and the Office of Energy Efficiency and Renewable Energy of the Department of Energy under NSF Cooperative Agreement No. EEC-1041895. Any opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect those of the National Science Foundation or Department of Energy. Publisher Copyright: {\textcopyright} 2019 IEEE.; 46th IEEE Photovoltaic Specialists Conference, PVSC 2019 ; Conference date: 16-06-2019 Through 21-06-2019",
year = "2019",
month = jun,
doi = "10.1109/PVSC40753.2019.8980857",
language = "English (US)",
series = "Conference Record of the IEEE Photovoltaic Specialists Conference",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "1919--1923",
booktitle = "2019 IEEE 46th Photovoltaic Specialists Conference, PVSC 2019",
}