SKM 2023 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 32: Organic Electronics and Photovoltaics II (joint session CPP/HL)
HL 32.5: Talk
Wednesday, March 29, 2023, 16:00–16:15, GÖR 226
Analysis of industrial viability for single-component organic solar cells — •Yakun He1,2, Ning Li1, Thomas Heumüller1, Jonas Wortmann1, and Christoph Brabec1 — 1Friedrich-Alexander-Universität Erlangen-Nürnberg, Martensstrasse 7, 91058 Erlangen, Germany — 2KAUST Solar Center, King Abdullah University of Science and Technology, Thuwal 23955, Saudi Arabia
Despite approaching 20% efficiency, organic solar cells still lag behind for industrial application. The industrial figure of merit (i-FOM) of OSCs is analyzed, including PCE, photostability, and synthetic complexity (SC) index. Single-component organic solar cells (SCOSCs) employing materials with donor and acceptor moieties chemically bonded within one molecule or polymer exhibit intrinsically high morphological stability. SCOSCs exhibit overall much higher i-FOM values than the corresponding bulk heterojunction OSCs, and the highest value reaches 0.3, which is even higher than the famous PM6:Y6, even though the PCE (8%) is only half of PM6:Y6. Synthetic complexity of SCOSCs is slightly higher than that of the corresponding BHJ OSCs due to extra synthetic step for connecting donor and acceptor moieties. This feature however overcomes the large-scale phase separation and stability issue. SCOSCs based on dyad 1 exhibit surprisingly high photostability under concentrated light (7.5 suns and 30 suns), corresponding to almost unchanged device stability up to 10,000 hours under 1-sun illumination. For realizing industrial application, SCOSCs have to achieve higher efficiencies, while BHJ should be developed with less complicated synthesis.