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Title: Three-terminal III–V/Si tandem solar cells enabled by a transparent conductive adhesive

Abstract

Tandem or multijunction solar cells are able to convert sunlight to electricity with greater efficiency than single junction solar cells by splitting the solar spectrum across sub-cells with different bandgaps. With the efficiencies of many common single-junction solar cell materials leveling off near their theoretical efficiency limits, there is renewed interest in applying this approach. However, there is ongoing debate as to the best approach for interconnecting sub-cells in series, or whether it is preferable to operate them independently. Here in this paper, we provide the first experimental demonstration of a tandem cell architecture with three terminals: one on top of the tandem cell, and two beneath it, in interdigitated back contact configuration. The two cells are interconnected with a transparent conductive adhesive, which is compatible with rough surfaces and exhibits negligible series resistance. Combining GaInP and Si sub-cells in this manner allows us to achieve a GaInP/Si tandem cell with a two-terminal efficiency of 26.4 ± 1.0%. We then show that utilizing all three terminals results in an efficiency boost of 0.9 ± 0.2%, to an efficiency of 27.3 ± 1.0%, and discuss the operation of the cell and its two interacting circuits.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [1];  [1];  [1];  [1]; ORCiD logo [1];  [1];  [3]; ORCiD logo [1]; ORCiD logo [1]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States); Inst. for Solar Energy Research Hamelin, Emmerthal (Germany)
  3. Inst. for Solar Energy Research Hamelin, Emmerthal (Germany)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S); European Union (EU); German Research Foundation (DFG)
OSTI Identifier:
1579642
Alternate Identifier(s):
OSTI ID: 1575822
Report Number(s):
NREL/JA-5K00-71514
Journal ID: ISSN 2398-4902; SEFUA7
Grant/Contract Number:  
AC36-08GO28308; EE00030299; 324040; 608498; SCHU 3206/1-1
Resource Type:
Accepted Manuscript
Journal Name:
Sustainable Energy & Fuels
Additional Journal Information:
Journal Name: Sustainable Energy & Fuels; Journal ID: ISSN 2398-4902
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE; tandem cell; multijunction; conductive adhesive; GaInP; Si; interdigitated back contact; high efficiency

Citation Formats

Schnabel, Manuel, Schulte-Huxel, Henning, Rienacker, Michael, Warren, Emily L., Ndione, Paul F., Nemeth, Bill M., Klein, Talysa R., Van Hest, Maikel F. A. M., Geisz, John F., Peibst, Robby, Stradins, Pauls, and Tamboli, Adele C. Three-terminal III–V/Si tandem solar cells enabled by a transparent conductive adhesive. United States: N. p., 2020. Web. doi:10.1039/C9SE00893D.
Schnabel, Manuel, Schulte-Huxel, Henning, Rienacker, Michael, Warren, Emily L., Ndione, Paul F., Nemeth, Bill M., Klein, Talysa R., Van Hest, Maikel F. A. M., Geisz, John F., Peibst, Robby, Stradins, Pauls, & Tamboli, Adele C. Three-terminal III–V/Si tandem solar cells enabled by a transparent conductive adhesive. United States. doi:10.1039/C9SE00893D.
Schnabel, Manuel, Schulte-Huxel, Henning, Rienacker, Michael, Warren, Emily L., Ndione, Paul F., Nemeth, Bill M., Klein, Talysa R., Van Hest, Maikel F. A. M., Geisz, John F., Peibst, Robby, Stradins, Pauls, and Tamboli, Adele C. Wed . "Three-terminal III–V/Si tandem solar cells enabled by a transparent conductive adhesive". United States. doi:10.1039/C9SE00893D.
@article{osti_1579642,
title = {Three-terminal III–V/Si tandem solar cells enabled by a transparent conductive adhesive},
author = {Schnabel, Manuel and Schulte-Huxel, Henning and Rienacker, Michael and Warren, Emily L. and Ndione, Paul F. and Nemeth, Bill M. and Klein, Talysa R. and Van Hest, Maikel F. A. M. and Geisz, John F. and Peibst, Robby and Stradins, Pauls and Tamboli, Adele C.},
abstractNote = {Tandem or multijunction solar cells are able to convert sunlight to electricity with greater efficiency than single junction solar cells by splitting the solar spectrum across sub-cells with different bandgaps. With the efficiencies of many common single-junction solar cell materials leveling off near their theoretical efficiency limits, there is renewed interest in applying this approach. However, there is ongoing debate as to the best approach for interconnecting sub-cells in series, or whether it is preferable to operate them independently. Here in this paper, we provide the first experimental demonstration of a tandem cell architecture with three terminals: one on top of the tandem cell, and two beneath it, in interdigitated back contact configuration. The two cells are interconnected with a transparent conductive adhesive, which is compatible with rough surfaces and exhibits negligible series resistance. Combining GaInP and Si sub-cells in this manner allows us to achieve a GaInP/Si tandem cell with a two-terminal efficiency of 26.4 ± 1.0%. We then show that utilizing all three terminals results in an efficiency boost of 0.9 ± 0.2%, to an efficiency of 27.3 ± 1.0%, and discuss the operation of the cell and its two interacting circuits.},
doi = {10.1039/C9SE00893D},
journal = {Sustainable Energy & Fuels},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {1}
}

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