Chemically Engineered Titanium Oxide Interconnecting Layer for Multijunction Polymer Solar Cells.
Polymers (Basel)
; 16(5)2024 Feb 21.
Article
em En
| MEDLINE
| ID: mdl-38475280
ABSTRACT
We report chemically tunable n-type titanium oxides using ethanolamine as a nitrogen dopant source. As the amount of ethanolamine added to the titanium oxide precursor during synthesis increases, the Fermi level of the resulting titanium oxides (ethanolamine-incorporated titanium oxides) significantly changes from -4.9 eV to -4.3 eV, and their free charge carrier densities are enhanced by two orders of magnitudes, reaching up to 5 × 1018 cm-3. Unexpectedly, a basic ethanolamine reinforces not only the n-type properties of titanium oxides, but also their basicity, which facilitates acid-base ionic junctions in contact with acidic materials. The enhanced charge carrier density and basicity of the chemically tuned titanium oxides enable multi-junction solar cells to have interconnecting junctions consisting of basic n-type titanium oxides and acidic p-type PEDOTPSS to gain high open-circuit voltages of 1.44 V and 2.25 V from tandem and triple architectures, respectively.
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MEDLINE
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En
Ano de publicação:
2024
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Article