We report on the application of solution-based p-type electrical doping using 12-molybdophosphoric acid hydrate (PMA) to the fabrication of organic tandem solar cells. Such a doping approach leads to a spatially confined vertical doping profile down to a limited depth from the surface of polymer films, thus allowing the hole-collecting component of the charge recombination stack to be embedded in the photoactive layer of the bottom sub-cell. This simplifies the device architecture by removing the need for an extra dedicated hole-collecting layer. It is shown that this novel charge recombination stack comprising a PMA-doped bottom photoactive layer and a trilayer of Ag/AZO/PEIE is compatible with a solution-processed top photoactive layer. The fabricated inverted organic tandem solar cells exhibit an open-circuit voltage that is close to the sum of the open-circuit voltages of the individual sub-cells, and a fill factor that is close to the better fill factor of the two sub-cells.
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7 September 2023
Research Article|
September 05 2023
Inverted organic tandem solar cells with a charge recombination stack employing spatially confined p-type electrical doping
Yi-Chien Chang
;
Yi-Chien Chang
(Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Writing – original draft, Writing – review & editing)
1
Center for Organic Photonics and Electronics (COPE), School of Electrical and Computer Engineering, Georgia Institute of Technology
, Atlanta, Georgia 30332, USA
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Felipe A. Larrain
;
Felipe A. Larrain
(Conceptualization, Methodology, Writing – review & editing)
1
Center for Organic Photonics and Electronics (COPE), School of Electrical and Computer Engineering, Georgia Institute of Technology
, Atlanta, Georgia 30332, USA
2
Faculty of Engineering and Sciences, Universidad Adolfo Ibáñez
, Santiago 7941169, Chile
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Canek Fuentes-Hernandez
;
Canek Fuentes-Hernandez
(Conceptualization, Project administration, Supervision, Writing – review & editing)
1
Center for Organic Photonics and Electronics (COPE), School of Electrical and Computer Engineering, Georgia Institute of Technology
, Atlanta, Georgia 30332, USA
3
Department of Electrical and Computer Engineering, Northeastern University
, Boston, Massachusetts 02115, USA
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Youngrak Park;
Youngrak Park
(Investigation, Methodology, Writing – review & editing)
1
Center for Organic Photonics and Electronics (COPE), School of Electrical and Computer Engineering, Georgia Institute of Technology
, Atlanta, Georgia 30332, USA
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Bernard Kippelen
Bernard Kippelen
a)
(Conceptualization, Funding acquisition, Project administration, Resources, Supervision, Writing – review & editing)
1
Center for Organic Photonics and Electronics (COPE), School of Electrical and Computer Engineering, Georgia Institute of Technology
, Atlanta, Georgia 30332, USA
a)Author to whom correspondence should be addressed: [email protected]
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a)Author to whom correspondence should be addressed: [email protected]
J. Appl. Phys. 134, 095502 (2023)
Article history
Received:
July 05 2023
Accepted:
August 17 2023
Citation
Yi-Chien Chang, Felipe A. Larrain, Canek Fuentes-Hernandez, Youngrak Park, Bernard Kippelen; Inverted organic tandem solar cells with a charge recombination stack employing spatially confined p-type electrical doping. J. Appl. Phys. 7 September 2023; 134 (9): 095502. https://doi.org/10.1063/5.0166499
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