Full metadata record
DC Field | Value | Language |
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dc.contributor.author | Kim, Jigeon | - |
dc.contributor.author | Han, Sanghun | - |
dc.contributor.author | Lee, Gyudong | - |
dc.contributor.author | Choi, Jongmin | - |
dc.contributor.author | Ko, Min Jae | - |
dc.contributor.author | Kim, Younghoon | - |
dc.date.accessioned | 2022-10-31T08:00:03Z | - |
dc.date.available | 2022-10-31T08:00:03Z | - |
dc.date.created | 2022-07-11 | - |
dc.date.issued | 2022-11 | - |
dc.identifier.issn | 1385-8947 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.11750/16976 | - |
dc.description.abstract | Lead halide perovskite colloidal quantum dots (PQDs) are receiving great interest in emerging photovoltaics because of their excellent photovoltaic properties and the room-temperature processability without a thermal annealing step. Conductive thick PQD absorbers reported to date have been fabricated via multiple-step layer-by-layer deposition based on solid-state ligand exchange; however, this approach requiring a lot of processing time and cost is not suitable for the mass production. Thus, a single-step fabrication approach of conductive thick PQD absorbers should be devised. Herein, we demonstrate that conductive thick CsPbI3-PQD absorbers can be fabricated via a single-step process based on the surface ligand manipulation and employed in efficient PQD solar cells. We find that the conventional ethyl acetate-based post-treatment significantly removes long-chain ligands of the unexchanged PQDs (UN-PQDs) and cause film delamination of thick UN-PQD solids because of drastic volume shrinkage. Thus, we employ the methyl acetate-based post-treatment using phenethylammonium acetate (PEAOAc) to replace both long-chain oleate and oleylammonium within thick UN-PQD solids with short-chain PEA and OAc ligands without film delamination. To further reduce long-chain ligands within the resultant PQD solids, we also employ the PQDs prepared via a solution-phase ligand exchange (SPLE-PQDs) using the phenethylammonium iodide. Furthermore, we perform various spectroscopic measurements, including Fourier-transform infrared, nuclear magnetic resonance, and X-ray photoelectron spectroscopy, to quantitatively analyze the surface chemistry and ligands of PQDs. Consequently, CsPbI3-PQD solar cells, fabricated via a single-step process using SPLE-PQDs and PEAOAc post-treatment, show improved power conversion efficiency (13.7%) compared to that of the UN-PQD device (12.1%). © 2022 Elsevier B.V. | - |
dc.language | English | - |
dc.publisher | Elsevier BV | - |
dc.title | Single-step-fabricated perovskite quantum dot photovoltaic absorbers enabled by surface ligand manipulation | - |
dc.type | Article | - |
dc.identifier.doi | 10.1016/j.cej.2022.137672 | - |
dc.identifier.scopusid | 2-s2.0-85132743590 | - |
dc.identifier.bibliographicCitation | Chemical Engineering Journal, v.448 | - |
dc.description.isOpenAccess | FALSE | - |
dc.subject.keywordAuthor | Ligand design | - |
dc.subject.keywordAuthor | Perovskite quantum dots | - |
dc.subject.keywordAuthor | Single-step deposition process | - |
dc.subject.keywordAuthor | Solar cells | - |
dc.subject.keywordAuthor | Solution-phase ligand exchange | - |
dc.subject.keywordPlus | SOLAR-CELLS | - |
dc.subject.keywordPlus | PHASE | - |
dc.subject.keywordPlus | STABILITY | - |
dc.subject.keywordPlus | EXCHANGE | - |
dc.subject.keywordPlus | NANOCRYSTALS | - |
dc.subject.keywordPlus | EFFICIENCY | - |
dc.subject.keywordPlus | CRYSTALSFILMSPBSEINKS | - |
dc.citation.title | Chemical Engineering Journal | - |
dc.citation.volume | 448 | - |
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