Extended Data Fig. 7: Photo-, thermal, and outdoor stability of the PM6:PCE13:PY-IT-based ternary devices. | Nature Photonics

Extended Data Fig. 7: Photo-, thermal, and outdoor stability of the PM6:PCE13:PY-IT-based ternary devices.

From: Elucidating the photodegradation pathways of polymer donors for organic solar cells with seven months of outdoor operational stability

Extended Data Fig. 7: Photo-, thermal, and outdoor stability of the PM6:PCE13:PY-IT-based ternary devices.The alternative text for this image may have been generated using AI.

(a) PCE13 with fragile S-containing side-chains (LBO values in Supplementary Fig. 50). (b) Photostability of the PM6:PCE13:PY-IT-based ternary devices. Initial PCEs for the devices: PM6:PY-IT (15.4%); PCE13:PY-IT (11.3%); PM6:PCE13:PY-IT (0.95:0.05:1, 15.9%); PM6:PCE13:PY-IT (0.9:0.1:1, 15.7%). The photostability test was conducted under open-circuit conditions at 27 °C, using AM 1.5 G 100 mW cm−2 illumination in an N2 atmosphere. Notably, different from the direct energetic trap states caused by the tiny oxidized fullerenes in blends24, the introduction of small amount of guest polymer donor with unstable side-chains had a negligible impact on the photo- and outdoor stability of ternary OSCs. When transitioning to the comparable binary systems, it becomes evident that PM6-based devices is more photostable than the PCE13-based devices. (c) Thermal stability of the PM6:PCE13:PY-IT-based ternary devices. Initial photovoltaic parameters are listed in Supplementary Table 9. The error bars represent the s.d. of independent measurements (n = 6), and the centres represent the average values. (d) outdoor stability of the PM6:PCE13:PY-IT-based ternary devices. Initial PCEs for the encapsulated devices: PM6:PY-IT (15.1/14.4/15.0%); PCE13:PY-IT (7.7/7.6/7.4%); PM6: PCE13:PY-IT (0.95:0.05:1, 12.8/13.7/13.5%); PM6:PCE13:PY-IT (0.9:0.1:1, 13.4/14.2/14.0%).

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