Light Trapping for High Efficiency Heterojunction Crystalline Si Solar Cells: Preprint

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Light trapping plays an important role to achieve high short circuit current density (Jsc) and high efficiency for amorphous/crystalline Si heterojunction solar cells. Si heterojunction uses hydrogenated amorphous Si for emitter and back contact. This structure of solar cell posses highest open circuit voltage of 0.747 V at one sun for c-Si based solar cells. It also suggests that over 25% record-high efficiency is possible with further improvement of Jsc. Light trapping has two important tasks. The first one is to reduce the surface reflectance of light to zero for the solar spectrum that Si has a response. The second ... continued below

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9 p.

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Wang, Q.; Xu, Y.; Iwaniczko, E. & Page, M. April 1, 2011.

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Light trapping plays an important role to achieve high short circuit current density (Jsc) and high efficiency for amorphous/crystalline Si heterojunction solar cells. Si heterojunction uses hydrogenated amorphous Si for emitter and back contact. This structure of solar cell posses highest open circuit voltage of 0.747 V at one sun for c-Si based solar cells. It also suggests that over 25% record-high efficiency is possible with further improvement of Jsc. Light trapping has two important tasks. The first one is to reduce the surface reflectance of light to zero for the solar spectrum that Si has a response. The second one is to increase the effective absorption length to capture all the photon. For Si heterojunction solar cell, surface texturing, anti-reflectance indium tin oxides (ITO) layer at the front and back are the key area to improve the light trapping.

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9 p.

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  • Presented at the China Semiconductor Technology International Conference 2011, March 13-14, 2011, Shanghai, China

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  • Report No.: NREL/CP-5200-51248
  • Grant Number: AC36-08GO28308
  • Office of Scientific & Technical Information Report Number: 1013909
  • Archival Resource Key: ark:/67531/metadc829213

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  • April 1, 2011

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  • May 19, 2016, 3:16 p.m.

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  • April 6, 2017, 3:31 p.m.

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Wang, Q.; Xu, Y.; Iwaniczko, E. & Page, M. Light Trapping for High Efficiency Heterojunction Crystalline Si Solar Cells: Preprint, article, April 1, 2011; Golden, Colorado. (digital.library.unt.edu/ark:/67531/metadc829213/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.