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Boosting The Current Density In Inverted Schottky PbS Quantum Dot Solar Cells With Conjugated Electrolyte

Van-Tuan Mai, Van-Tuan Mai, Ngoc-Huyen Duong, X. Mai, X. Mai
Published 2019 · Materials Science

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Abstract Herein, we correlate the chemical structure of the electrolyte with the performance of inverted Schottky quantum dot (QD) solar cells (SCs) having a structure of FTO/electrolyte/p-type PbS QDs/MoOx/Au-Ag. QDSCs of polyethyleneimine (PEI) or poly[(9,9-bis(3′-(N,N-dimethylamino)propyl)-2,7-fluorene)-alt-1,4-phenylene] (PFN) were fabricated for comparison. The open-circuit voltage (VOC) of QDSCs scaled with the workfunction of electrolyte – modified fluorine-doped tin oxide (FTO). Conjugated PFN electrolyte resulted in lower VOC but it boosted the current density (JSC) of QDSCs by lowering the interfacial potential barrier at FTO-PbS QDs contact.
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