Quantifying the Absorption Onset in the Quantum Efficiency of Emerging Photovoltaic Devices
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Otros documentos de la autoría: Almora Rodríguez, Osbel; Cabrera, Carlos I.; Garcia Cerrillo, Jose; Kirchartz, Thomas; Rau, Uwe; Brabec, Christoph J.
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Título
Quantifying the Absorption Onset in the Quantum Efficiency of Emerging Photovoltaic DevicesAutoría
Fecha de publicación
2021-04-28Editor
WileyISSN
1614-6832; 1614-6840Cita bibliográfica
Almora, O., Cabrera, C. I., Garcia-Cerrillo, J., Kirchartz, T., Rau, U., Brabec, C. J., Quantifying the Absorption Onset in the Quantum Efficiency of Emerging Photovoltaic Devices. Adv. Energy Mater. 2021, 11, 2100022. https://doi.org/10.1002/aenm.202100022Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
https://onlinelibrary.wiley.com/doi/full/10.1002/aenm.202100022Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
The external quantum efficiency (EQE), also known as incident-photon-to-collected-electron spectra are typically used to access the energy dependent photocurrent losses for photovoltaic devices. The integral over the ... [+]
The external quantum efficiency (EQE), also known as incident-photon-to-collected-electron spectra are typically used to access the energy dependent photocurrent losses for photovoltaic devices. The integral over the EQE spectrum results in the theoretical short-circuit current under a given incident illumination spectrum. Additionally, one can also estimate the photovoltaic bandgap energy (Eg) from the inflection point in the absorption threshold region. The latter has recently been implemented in the “Emerging PV reports,” where the highest power conversion efficiencies are listed for different application categories, as a function of Eg. Furthermore, the device performance is put into perspective thereby relating it to the corresponding theoretical limit in the Shockley–Queisser (SQ) model. Here, the evaluation of the EQE spectrum through the sigmoid function is discussed and proven to effectively report the Eg value and the sigmoid wavelength range λs, which quantifies the steepness of the absorption onset. It is also shown how EQE spectra with large λs indicate significant photovoltage losses and present the corresponding implications on the photocurrent SQ model. Similarly, the difference between the photovoltaic and optical bandgap is analyzed in terms of λs. [-]
Publicado en
Advanced Energy Materials, 2021, vol. 11, no 16Entidad financiadora
European Commission | Deutscher Akademischer Austauschdienst | Solar Factory of the Future | SolTech Initiative by the Bavarian State Government | Deutsche Forschungsgemeinschaft
Código del proyecto o subvención
FKZ 20.2-3410.5-4-5 | SFB 953, 182849149
Proyecto de investigación
info:eu-repo/grantAgreement/EC/H2020/871336-PEROXISDerechos de acceso
info:eu-repo/semantics/openAccess
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