RT Journal Article
T1 Minimizing geminate recombination losses in small-molecule-based organic solar cells
A1 Sandoval Torrientes, Rafael
A1 Gavrik, Alexey
A1 Isakova, Anna
A1 Abudulimu, Abasi
A1 Calbo, Joaquín
A1 Aragó, Juan
A1 Santos, José
A1 Orti, Enrique
A1 Martín, Nazario
A1 Dyakonov, Vladimir
A1 Lüer, Larry
AB Small-molecule-based organic solar cells (OSCs) are a recurrent alternative to polymer-based OSCs. Due to the higher purity and definition of small molecules compared to polymers, the morphological requirements can be more relaxed. Here, we present a series of novel rhodanine-based small-molecule electron donors and blend them with the standard acceptor PC70BM. By performing a target analysis on femtosecond spectroscopy data, we quantify the rates of geminate charge recombination. We are able to reproduce these rates by applying the Marcus–Levich–Jortner equation, using results from quantum chemical calculations. This shows that in a series of differently substituted compounds, one can correctly predict trends in geminate recombination rates by relying only on quantities that are easy to measure (cyclic voltammetry, optical spectra) or that can be calculated by relatively inexpensive methods such as (TD)DFT. Our method should thus accelerate the search for high-performance small-molecule photovoltaic blends.
PB Royal Soc. Chemistry
SN 2050-7526
YR 2019
FD 2019
LK https://hdl.handle.net/20.500.14352/13871
UL https://hdl.handle.net/20.500.14352/13871
LA eng
NO Unión Europea. FP7
NO Ministerio de Economía y Competitividad (MINECO)/FEDER
NO Comunidad de Madrid
NO Generalitat Valenciana
NO Centro de Excelencia Severo Ochoa
NO Centro de Excelencia María de Maeztu
DS Docta Complutense
RD 6 abr 2025