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Jang, Sung-Yeon
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Improved Passivation of PbS Quantum Dots for Solar Cells Using Triethylamine Hydroiodide

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dc.contributor.author Park, Dasom ko
dc.contributor.author Azmi, Randi ko
dc.contributor.author Cho, Youngho ko
dc.contributor.author Kim, Hyung Min ko
dc.contributor.author Jang, Sung-Yeon ko
dc.contributor.author Yim, Sanggyu ko
dc.date.available 2019-07-22T00:35:28Z -
dc.date.created 2019-07-01 ko
dc.date.issued 2019-06 ko
dc.identifier.citation ACS SUSTAINABLE CHEMISTRY & ENGINEERING, v.7, no.12, pp.10784 - 10791 ko
dc.identifier.issn 2168-0485 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/27026 -
dc.description.abstract Surface passivation of colloidal quantum dot (CQD) is one of the most crucial factors used to determine the power conversion efficiency (PCE) of CQD based solar cell (CQDSC) devices. In this work, we developed novel alkylammonium iodide based ligands, which can achieve more effective passivation of iodide for PbS based CQD than the conventionally used tetra-n-butylammonium iodide (TBAI). Sufficient ion dissociation property and higher acidity of triethylamine hydroiodide (tri-EAHI) led to the enhanced oleate ligand removal and iodide passivation compared to TBAI. Owing to the improved iodide passivation by tri-EAHI, the sub-bandgap trap density was successfully reduced, which offered lower doping density and higher electron mobility than TBAI. As a result, the depletion region in CQD active layers was widened, while the charge recombination in CQDSC was significantly reduced. The CQDSCs with the tri-EAHI achieved significantly higher PCE (9.84%) than that obtained using conventional TBAI (9.20%). ko
dc.language 영어 ko
dc.publisher American Chemical Society ko
dc.title Improved Passivation of PbS Quantum Dots for Solar Cells Using Triethylamine Hydroiodide ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85066975567 ko
dc.identifier.wosid 000472240900067 ko
dc.type.rims ART ko
dc.identifier.doi 10.1021/acssuschemeng.9b01542 ko
dc.identifier.url https://pubs.acs.org/doi/10.1021/acssuschemeng.9b01542 ko
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