This title appears in the Scientific Report :
2018
Please use the identifier:
http://dx.doi.org/10.1016/j.solmat.2018.08.022 in citations.
Voltage-matched thin film solar cells in 3-terminal configuration
Voltage-matched thin film solar cells in 3-terminal configuration
Multijunction solar cells, proven technological route for achievements of highest PV conversion efficiencierequire accurate tuning of the sub-cell absorption to ensure that every cell in the stack delivers the same currentdensity. Even though currents of the sub-cells can be precisely matched for a...
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Personal Name(s): | Clemente de Lima, R. |
---|---|
Merdzhanova, T. / Turan, B. / Kirchhoff, Joachim / Hüpkes, J. / Zahren, C. / Astakhov, O. (Corresponding author) | |
Contributing Institute: |
Photovoltaik; IEK-5 |
Published in: | Solar energy materials & solar cells, 188 (2018) S. 202 - 209 |
Imprint: |
Amsterdam [u.a.]
NH, Elsevier
2018
|
DOI: |
10.1016/j.solmat.2018.08.022 |
Document Type: |
Journal Article |
Research Program: |
Solar cells of the next generation |
Publikationsportal JuSER |
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100 | 1 | |a Clemente de Lima, R. |0 P:(DE-Juel1)169670 |b 0 | |
245 | |a Voltage-matched thin film solar cells in 3-terminal configuration | ||
260 | |a Amsterdam [u.a.] |c 2018 |b NH, Elsevier | ||
520 | |a Multijunction solar cells, proven technological route for achievements of highest PV conversion efficiencierequire accurate tuning of the sub-cell absorption to ensure that every cell in the stack delivers the same currentdensity. Even though currents of the sub-cells can be precisely matched for a fixed illumination spectrum,current mismatch cannot be avoided in real terrestrial applications due to variations of the irradiance spectrum.The issue becomes critical when a solar cell has to cover wider range of applications such as a mixture of directsun / shadow / artificial lightthe case for various distributed PV-powered electronics. Furthermore the current–matching constrains choice of materials and designs of sub-cells for a tandem device. A straightforward basicconfiguration with decoupling the sub-cell's currents is a 3-terminal configuration with one additional contactsheared by the top and bottom cell. This concept requires voltage-matching between the top and bottom cellwhen these cells are integrated in modules. A realistic concept for the voltage-matched 3-terminal cell reportedrecently includes a wide gap top cell combined with a tandem bottom cell made of 2 sub-cells with lowerbandgaps. The concept is a hybrid between 2 and 3-terminal configurations with voltage matching and relaxedcurrent matching constrains. Established thin film silicon solar cell technology provides interesting option torealize the hybrid 3-terminal cell with amorphous Si top cell(VOC0.9 V) and two microcrystalline Si cells(VOC0.5 V). In this work we present proof of concept of the voltage matched 3-terminal tandem cell prepared with˜highly transparent and conductive IOH intermediate contact. The efficiency of 10.4% has been achieved madeup of independently operating 7.9% efficient top cell and 2.5% efficient bottom tandem cell. The paper summarizesthe development and discusses optical losses identified in the 3-T devices. | ||
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700 | 1 | |a Astakhov, O. |0 P:(DE-Juel1)130212 |b 6 |e Corresponding author | |
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