Zobrazeno 1 - 10
of 175
pro vyhledávání: '"Sandberg, P. J."'
Autor:
Sandberg, Oskar J, Armin, Ardalan
Organic photovoltaics (OPVs) are promising candidates for future sustainable technologies, including applications within the renewable energy sector, such as solar cells and indoor light recycling, and photodetection. However, the performance of OPVs
Externí odkaz:
http://arxiv.org/abs/2307.09698
Autor:
Kay, Austin M., Fitzsimons, Maura E., Burwell, Gregory, Meredith, Paul, Armin, Ardalan, Sandberg, Oskar J.
Due to their tailorable optical properties, organic semiconductors show considerable promise for use in indoor photovoltaics (IPVs), which present a sustainable route for powering ubiquitous "Internet-of-Things" devices in the coming decades. However
Externí odkaz:
http://arxiv.org/abs/2303.02004
Autor:
Kay, Austin M., Sandberg, Oskar J., Zarrabi, Nasim, Li, Wei, Zeiske, Stefan, Kaiser, Christina, Meredith, Paul, Armin, Ardalan
Organic semiconductors are disordered molecular solids and as a result, their internal charge dynamics and ultimately, the performance of the optoelectronic devices they constitute, are governed by energetic disorder. To ascertain how energetic disor
Externí odkaz:
http://arxiv.org/abs/2112.07702
Understanding the role that exciton diffusion plays in organic solar cells is a crucial to understanding the recent rise in power conversion effciencies brought about by non-fullerene acceptors (NFA). Established methods for measuring exciton diffusi
Externí odkaz:
http://arxiv.org/abs/2109.00839
Autor:
Sandberg, Oskar J, Armin, Ardalan
Publikováno v:
J. Phys. Chem. C 2021
The thermodynamic limit for the efficiency of solar cells is predominantly defined by the energy bandgap of the used semiconductor. In case of organic solar cells both energetics and kinetics of three different species play role: excitons, charge tra
Externí odkaz:
http://arxiv.org/abs/2104.11357
Autor:
Riley, Drew B., Sandberg, Oskar J., Wilson, Nora M., Li, Wei, Zeiske, Stefan, Zarrabi, Nasim, Meredith, Paul, Osterbacka, Ronald, Armin, Ardalan
Publikováno v:
Phys. Rev. Applied 15, 064035 (2021)
Non-radiative losses to the open-circuit voltage are a primary factor in limiting the power conversion efficiency of organic photovoltaic devices. The dominant non-radiative loss is intrinsic to the active layer and can be determined from the quasi-F
Externí odkaz:
http://arxiv.org/abs/2103.01267
Autor:
Kaiser, Christina, Sandberg, Oskar J., Zarrabi, Nasim, Li, Wei, Meredith, Paul, Armin, Ardalan
In crystalline semiconductors, absorption onset sharpness is characterized by temperature dependent Urbach energies. These energies quantify the static, structural disorder causing localized exponential-tail states, and dynamic disorder from electron
Externí odkaz:
http://arxiv.org/abs/2102.13038
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Publikováno v:
Sol. RRL 4 (2020) 1900505
Space charge effects can significantly degrade charge collection in organic photovoltaics (OPVs), especially in thick-film devices. The two main causes of space charge are doping and imbalanced transport. Although these are completely different pheno
Externí odkaz:
http://arxiv.org/abs/1911.00866
Autor:
Sandberg, Oskar J., Dahlström, Staffan, Nyman, Mathias, Wilken, Sebastian, Scheunemann, Dorothea, Österbacka, Ronald
Publikováno v:
Phys. Rev. Applied 12, 034008 (2019)
Unintentional doping of the active layer is a source for lowered device performance in organic solar cells. The effect of doping is to induce a space-charge region within the active layer, generally resulting in increased recombination losses. In thi
Externí odkaz:
http://arxiv.org/abs/1908.07815