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Title: 22.5% efficient silicon heterojunction solar cell with molybdenum oxide hole collector

Abstract

Substituting the doped amorphous silicon films at the front of silicon heterojunction solar cells with wide-bandgap transition metal oxides can mitigate parasitic light absorption losses. This was recently proven by replacing p-type amorphous silicon with molybdenum oxide films. In this article, we evidence that annealing above 130 °C—often needed for the curing of printed metal contacts—detrimentally impacts hole collection of such devices. Furthermore, we circumvent this issue by using electrodeposited copper front metallization and demonstrate a silicon heterojunction solar cell with molybdenum oxide hole collector, featuring a fill factor value higher than 80% and certified energy conversion efficiency of 22.5%.

Authors:
 [1];  [1];  [1];  [2];  [1];  [2];  [2];  [1];  [1];  [1];  [3]
  1. Ecole Polytechnique Federale de Lausanne (EPFL), Neuchatel (Switzerland)
  2. CSEM PV-Center, Neuchatel (Switzerland)
  3. Ecole Polytechnique Federale de Lausanne (EPFL), Neuchatel (Switzerland); CSEM PV-Center, Neuchatel (Switzerland)
Publication Date:
Research Org.:
École Polytechnique Fédérale de Lausanne (Switzerland)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1229741
Grant/Contract Number:  
EE0006335
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 107; Journal Issue: 8; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Geissbühler, Jonas, Werner, Jérémie, Nicolas, Silvia Martin de, Barraud, Loris, Hessler-Wyser, Aïcha, Despeisse, Matthieu, Nicolay, Sylvain, Tomasi, Andrea, Niesen, Bjoern, De Wolf, Stefaan, and Ballif, Christophe. 22.5% efficient silicon heterojunction solar cell with molybdenum oxide hole collector. United States: N. p., 2015. Web. doi:10.1063/1.4928747.
Geissbühler, Jonas, Werner, Jérémie, Nicolas, Silvia Martin de, Barraud, Loris, Hessler-Wyser, Aïcha, Despeisse, Matthieu, Nicolay, Sylvain, Tomasi, Andrea, Niesen, Bjoern, De Wolf, Stefaan, & Ballif, Christophe. 22.5% efficient silicon heterojunction solar cell with molybdenum oxide hole collector. United States. doi:10.1063/1.4928747.
Geissbühler, Jonas, Werner, Jérémie, Nicolas, Silvia Martin de, Barraud, Loris, Hessler-Wyser, Aïcha, Despeisse, Matthieu, Nicolay, Sylvain, Tomasi, Andrea, Niesen, Bjoern, De Wolf, Stefaan, and Ballif, Christophe. Mon . "22.5% efficient silicon heterojunction solar cell with molybdenum oxide hole collector". United States. doi:10.1063/1.4928747. https://www.osti.gov/servlets/purl/1229741.
@article{osti_1229741,
title = {22.5% efficient silicon heterojunction solar cell with molybdenum oxide hole collector},
author = {Geissbühler, Jonas and Werner, Jérémie and Nicolas, Silvia Martin de and Barraud, Loris and Hessler-Wyser, Aïcha and Despeisse, Matthieu and Nicolay, Sylvain and Tomasi, Andrea and Niesen, Bjoern and De Wolf, Stefaan and Ballif, Christophe},
abstractNote = {Substituting the doped amorphous silicon films at the front of silicon heterojunction solar cells with wide-bandgap transition metal oxides can mitigate parasitic light absorption losses. This was recently proven by replacing p-type amorphous silicon with molybdenum oxide films. In this article, we evidence that annealing above 130 °C—often needed for the curing of printed metal contacts—detrimentally impacts hole collection of such devices. Furthermore, we circumvent this issue by using electrodeposited copper front metallization and demonstrate a silicon heterojunction solar cell with molybdenum oxide hole collector, featuring a fill factor value higher than 80% and certified energy conversion efficiency of 22.5%.},
doi = {10.1063/1.4928747},
journal = {Applied Physics Letters},
number = 8,
volume = 107,
place = {United States},
year = {2015},
month = {8}
}

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