ORCID Profile
0000-0002-0023-4793
Current Organisation
Hong Kong University of Science and Technology
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Publisher: American Chemical Society (ACS)
Date: 03-09-2021
Publisher: Springer Science and Business Media LLC
Date: 29-11-2022
Publisher: Springer Science and Business Media LLC
Date: 23-10-2020
Publisher: Wiley
Date: 18-01-2022
Abstract: From the past years, the most commonly reported state‐of‐the‐art binary bulk heterojunction organic solar cells (OSCs) are mostly based on mixtures of polymer donors and fullerene‐free acceptors (polymer:NFA). However, along with it are a number of contradictory propositions, including (but not limited to) strategies to reduce energy loss and improve photocurrent generation through energy level alignments. Due to the resulting high similarity of molecular fragments from polymer:NFA heterojunctions, the effects of vertical molecular stratification are not yet well studied. Herein, the time‐of‐flight secondary ion mass spectrometry (ToF‐SIMS) molecular depth profiling reveals a vertical stratification in PM6:IT‐4Cl and illustrates how it can significantly influence the photovoltaic properties. The said inhomogeneity is also bound to introduce microstructure variations within device active layers. Consequently, it is systematically demonstrated how thin‐film microstructures can influence optoelectronic properties, wherein important metrics (e.g., energy losses and molecular energy offsets) are highly dependent. Thus, the understanding from this work provides foundations for more precise development of strategies to further advance OSC technology in future studies.
Location: Korea, Republic of
Location: Philippines
No related grants have been discovered for Top Archie Dela Peña.