RT Journal Article
T1 Comparing the microstructure and photovoltaic performance of 3 perylene imide acceptors with similar energy levels but different packing tendencies
A1 Adel, Rana
A1 Gala Sánchez, Elena
A1 Alonso Navarro, Matías J.
A1 Gutiérrez Fernández, Edgar
A1 Martín, Jaime
A1 Stella, Marco
A1 Martínez Ferrero, Eugenia
A1 de la Peña, Alejandro
A1 Harbuzaru, Alexandra
A1 Ramos, M. Mar
A1 Ponce Ortiz, Rocío
A1 Segura Castedo, José Luis
A1 Campoy Quiles, Mariano
AB While it is widely recognized that microstructure plays an important role in the performance of organic photovoltaics (OPV), systematic studies are often challenging, as varying the molecular packing through typical chemical means (such as sidechain tuning) often affects the molecular energy levels, thus preventing a clear correlation. In this work we present the synthesis of three perylene imide (PI) based electron acceptors with almost identical energy levels, but distinct packing tendencies. We confirm our initial hypothesis by measuring solution and solid-state absorption, cyclic voltammetry as well as characterizing the films by grazing incident wide angle X-ray scattering (GIWAXS). In a second step, we repeat the characterization of the three materials in blends with two polymer donors, namely PCDTBT or PBDBT, whose energy levels are well aligned with those of the PI acceptors, and which, additionally, exhibit different degrees of structural order. We show how the initial strong difference between acceptors is partially blurred in blends, but still critical. Finally, we correlate our structural data with OPV devices made with the corresponding six blends. Our data suggest that a good donor acceptor marriage should ensure good energy alignment but also exhibit complementary crystallization tendencies of the two components.
PB Royal Society of Chemistry
YR 2021
FD 2021-01-07
LK https://hdl.handle.net/20.500.14352/124163
UL https://hdl.handle.net/20.500.14352/124163
LA eng
NO Adel, Rana, et al. «Comparing the Microstructure and Photovoltaic Performance of 3 Perylene Imide Acceptors with Similar Energy Levels but Different Packing Tendencies». Journal of Materials Chemistry C, vol. 10, n.o 5, 2022, pp. 1698-710. DOI.org (Crossref), https://doi.org/10.1039/D1TC05037K.
NO Ministerio de Ciencia, Innovación y Universidades (España)
DS Docta Complutense
RD 22 mar 2026