Electronic and microstructure properties of all-small-molecule organic solar cells

Pascal Kaienburg; Andreas Lauritzen; Irfan Habib; Olivia Gough; Subhrangsu Mukherjee; Harald Ade; Moritz Riede

doi:10.1117/12.2633625

3 October 2022 Electronic and microstructure properties of all-small-molecule organic solar cells

Pascal Kaienburg, Andreas Lauritzen, Irfan Habib, Olivia Gough, Subhrangsu Mukherjee, Harald Ade, Moritz Riede

Author Affiliations +

Proceedings Volume PC12209, Organic, Hybrid, and Perovskite Photovoltaics XXIII; PC122090P (2022) https://doi.org/10.1117/12.2633625
Event: SPIE Organic Photonics + Electronics, 2022, San Diego, California, United States

Abstract

All-Small-Molecule Organic Solar Cells (ASM-OSCs) have reached 17% efficiency. Unlike polymers, SM synthesis is reproducible with controlled quality, making ASM-OSC highly relevant for commercialization. We perform extensive optoelectronic and microstructure characterization on high-performing ASM-OSC deposited via solution and vacuum thermal evaporation. We quantify absorption, voltage losses, and charge transport – probed via ellipsometry, sensitive EQE, and CELIV, respectively. To rationalize differences in charge carrier mobility, we construct the phase diagram and study phase separation via scattering methods. Example systems include ZnPc:C60, DCV5T-Me:C60, BTR:PCBM, and BTR-Cl:Y6. We find, e.g., that ASM-OSCs can achieve lower voltage losses than corresponding polymer-based OSCs.

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Citation Download Citation

Pascal Kaienburg, Andreas Lauritzen, Irfan Habib, Olivia Gough, Subhrangsu Mukherjee, Harald Ade, and Moritz Riede "Electronic and microstructure properties of all-small-molecule organic solar cells", Proc. SPIE PC12209, Organic, Hybrid, and Perovskite Photovoltaics XXIII, PC122090P (3 October 2022); https://doi.org/10.1117/12.2633625

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KEYWORDS

Organic photovoltaics

Polymers

Solar cells

Molecules

External quantum efficiency

Optoelectronics

Scattering

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