Fig. 1: Universal photoluminescence quantum yield (PLQY) losses induced by C60, device structure and energy level diagram. | Nature Communications

Fig. 1: Universal photoluminescence quantum yield (PLQY) losses induced by C60, device structure and energy level diagram.

From: Overcoming C60-induced interfacial recombination in inverted perovskite solar cells by electron-transporting carborane

Fig. 1

a C60-induced recombination losses in various pin-type perovskite systems. Data reproduced with permission from Warby, J. et al. Understanding Performance Limiting Interfacial Recombination in pin Perovskite Solar Cells. Adv. Energy Mater. 2022, 12, 2103567. 10.1002/aenm.202103567 under a CC BY license https://creativecommons.org/licenses/by/4.0/.12 C60 lowers the PLQY to ≈1 × 10−4−1 × 10−3 of the neat layer, for various perovskite compositions represented by the different shading, such as methyl ammonium lead iodide (MAPbI3), double cation (FA0.8MA0.2PbI3) and triple-cation perovskites (Cs0.05FAxMAyPb(IxBry)3) which are denoted as “TC”, where the x:y ratio reflects the molar ration of FAPbI3 versus MAPbBr3, 2D/3D perovskites are denoted by the spacer cation butylammonium (BA) and the number of layers of octahedra between spacer cations, e.g., n = 4 is BA4. b Device structure and molecule structures of o-carborane (CB) as well as phenylamino decorated carborane (CB-NH2). c Energy levels based on cyclic voltammetry and literature values. d Space-charge limited current measurement of electron-only devices with the configuration of ITO/ZnO/ CB-NH2 (100 nm) or C60 (200 nm)/BCP/Ag. The inset shows the mobility variation under different bias voltages. Source data are provided as a Source Data file.

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