RT Journal Article
T1 Identification of Degradation Mechanisms in Slot-Die-Coated Nonfullerene ITO-Free Organic Solar Cells Using Different Illumination Spectra
A1 Arredondo Conchillo, Belén
A1 Pozo, Gonzalo del
A1 Hernandez Balaguera, Enrique
A1 Martín Martín, Diego
A1 Lopez Gonzalez, María del Carmen
A1 Romero, Beatriz
A1 López Fraguas, Eduardo
A1 Vergaz Benito, Ricardo
A1 Quintana, Xabier
A1 Lamminaho, Jani
A1 Destouesse, Elodie
A1 Ahmadpour, Mehrad
A1 Turkovic, Vida
A1 Madsen, Morten
AB In this work, we have studied degradation mechanisms of nonfullerene-based organic solar cells with PET/Ag/ZnO/PBDTB-T:ITIC/PEDOT:PSS/CPP PEDOT:PSS device structure. We compare pristine and degraded samples that were subjected to outdoor degradation following the standard ISOS-O2 protocol. The ideality factors for different incident wavelengths obtained from open-circuit voltage vs irradiation level and current density–voltage (J–V) measurements at different temperatures indicate that for aged samples recombination is governed by the Shockley–Read–Hall mechanism occurring in a region near the anode. Samples were also characterized using impedance spectroscopy (IS) and fitted to an electrical model. Impedance parameters were used to obtain mobility, indicating a clear degradation of the active layer blend for aged samples. The change in the chemical capacitance also reveals a worsening in carrier extraction. Finally, two-dimensional (2D) numerical simulations and fits to experimental J–V curves confirm the existence of a layer near the anode contact with poorer mobility and a decrease in the anode work function (WF) for the degraded samples.
PB American Chemical Society
SN 2574-0962
YR 2020
FD 2020-06-10
LK https://hdl.handle.net/10016/34882
UL https://hdl.handle.net/10016/34882
LA eng
NO This work was supported by Comunidad de Madrid under the SINFOTON2-CM Research Program (S2018/NMT-4326-SINFOTON2-CM) and the Spanish Ministry of Economy, the Agencia Estatal de Investigación, and European Union's FEDER under the TEC2016−77242-C1/C2/C3 AEI/FEDER, UE Projects. The work of E.L.-F. was supported by the Ministerio de Educación y Formación Profesional for his Doctoral Grant through the FPU Research Fellowship under Grant FPU17/00612. M.M., J.L., E.D., and V.T. acknowledge that part of this work was developed within the RollFlexproject, part-financed by Interreg Deutschland-Danmark with means from the European Regional Development Fund and the Southern Denmark Growth Forum. M.M. and V.T.acknowledge the support from the Villum Foundation for Project CompliantPV (Grant No. 13365). Finally, all authors acknowledge the support from the EU Framework ProgramHorizon 2020 for MNPS COST ACTION MP1307 StableNextSol.
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RD 1 sept. 2024