Author Correction: Traps and transport resistance are the next frontiers for stable non-fullerene acceptor solar cells

Wöpke, Christopher; Göhler, Clemens; Saladina, Maria; Du, Xuehui; Li, Nian; Greve, Christopher; Zhu, Chi; Yallum, Kaila M.; Hofstetter, Yvonne J.; Becker‐Koch, David; Li, Ning; Heumueller, Thomas; Milekhin, Ilya; Zahn, Dietrich R. T.; Brabec, Christoph J.; Banerji, Natalie; Vaynzof, Yana; Herzig, Eva M.; MacKenzie, Roderick C. I.; Deibel, Carsten

doi:10.1038/s41467-022-32073-x

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“…The V OC and P light follow the relationship of V OC ∝ nkT / q ln ( P light ), where k , T , and q are the Boltzmann constant, the absolute temperature, and the elementary charge, respectively . The lowest slope 1.08 kT / q of the CS 2 -processed device (Figure b) implies depressed monomolecular recombination by reduced trap density at interfaces in the device. , This is consistent with the highest V OC of 0.91 V, suggesting the lowest nonradiative recombination of the CS 2 -processed device due to less traps and more conductivity of the blend …”

Section: Resultssupporting

confidence: 54%

Efficient and Thermally Stable Organic Solar Cells via a Fully Halogen-Free Active Blend and Solvent

Zhao

Yin

et al. 2023

ACS Appl. Energy Mater.

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The state-of-the-art organic solar cells (OSCs) are basically based on halogenated active materials and solvents. However, halogens/halides could be detrimental to the stability of OSCs due to their corrosiveness to the interface and the electrode. On the other hand, the introduction of halogens, especially the use of halogen solvents, could cause hazards to the environment, further limiting the application of OSCs. Thus, it is meaningful to explore and develop efficient and stable OSCs based on halogen-free materials and solvents. It is demonstrated that fully halogen-free OSCs deliver efficient performance as well with an efficiency of 10.42%, based on the nonhalogenated active blend PBDB-T:ITIC and the nonhalogenated processing solvent CS2. More importantly, superior thermal stability is achieved for the halogen-free cells, with 95% of the initial efficiency retained in 1400 h under 85 °C in a N2 atmosphere, due to the stabilized blend morphology and impeded corrosion of the metal electrode. These results provide insights into the thermal degradation of OSCs and suggest possible rules/directions for the design of active materials and selection of solvents to achieve efficient and thermally stable OSCs.

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