Projekt per år
Sammanfattning
Reducing non-radiative recombination is key to achieve high fill factors (FFs) in organic solar cells. While it is generally accepted that recombination proceeds via charge transfer (CT) states at the donor:acceptor interface, the underlying principles that dictate the decay kinetics of these CT states are not yet well understood. Here, a study on the effect of energetic disorder is presented. Based on a data set of 10 representative donor:acceptor blends, clear correlations between disorder, the recombination coefficient of free charge carriers, and the non-radiative voltage loss are found. It is suggested that a narrower distribution of CT energies leads to a longer CT decay time and thus reduces non-radiative losses. This leads to a simultaneous improvement of the FF and open circuit voltage and highlights the importance of having materials with low energetic disorder on the way to the commercialisation of organic photovoltaics.
Originalspråk | Engelska |
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Artikelnummer | 2203576 |
Tidskrift | Advanced Energy Materials |
Volym | 13 |
Nummer | 8 |
DOI | |
Status | Publicerad - 24 feb. 2023 |
MoE-publikationstyp | A1 Tidskriftsartikel-refererad |
Fingeravtryck
Fördjupa i forskningsämnen för ”Relationship between Energetic Disorder and Reduced Recombination of Free Carriers in Organic Solar Cells”. Tillsammans bildar de ett unikt fingeravtryck.Projekt
- 1 Slutfört
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ReMorphOPV: Recombination in Organic Photovoltaics: Impact of Morphology and Long-Range Non-Equilibrium Transport
Wilken, S. (Ansvarig forskare) & Österbacka, R. (CoI)
15/01/19 → 21/02/21
Projekt: EU