Full metadata record
DC Field | Value | Language |
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dc.contributor.author | Kim, Jigeon | ko |
dc.contributor.author | Koo, Bonkee | ko |
dc.contributor.author | Kim, Wook. Hyun. | ko |
dc.contributor.author | Choi, Jongmin | ko |
dc.contributor.author | Choi, Changsoon | ko |
dc.contributor.author | Lim, Sung Jun | ko |
dc.contributor.author | Lee, Jong-Soo | ko |
dc.contributor.author | Kim, Dae-Hwan | ko |
dc.contributor.author | Ko, Min Jae | ko |
dc.contributor.author | Kim, Younghoon | ko |
dc.date.accessioned | 2019-12-16T01:02:45Z | - |
dc.date.available | 2019-12-16T01:02:45Z | - |
dc.date.created | 2019-10-10 | - |
dc.date.issued | 2019-12 | - |
dc.identifier.citation | Nano Energy, v.66 | - |
dc.identifier.issn | 2211-2855 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.11750/10986 | - |
dc.description.abstract | Fully inorganic CsPbI3 perovskite quantum dots (CsPbI3-PQDs) are known as the best-performing photovoltaic absorber in colloidal quantum dot solar cells. This is achieved by improving the cubic-phase-stabilization and electronic-coupling in CsPbI3-PQD solids. In conventional approaches, the hydrolysis of methyl acetate (MeOAc) resulting in acetic acid and methanol as intermediate substances plays a key role in replacing long-chain hydrocarbons with short-chain ligands, which improves charge transport in the CsPbI3-PQD solids. However, CsPbI3-PQDs suffer from lattice distortion and instability under acidic conditions including protons and polar media, leading to CsPbI3-PQD fusion and poor photovoltaic performance. Herein, we report that electronic coupling and photovoltaic performance of CsPbI3-PQD solids are improved by efficient removal of long-chain oleate ligands using a solution of sodium acetate (NaOAc) in MeOAc, which results in the direct generation of OAc ions without forming protons and methanol. NaOAc-based ligand exchange of CsPbI3-PQDs enables preservation of their nanocrystal size without fusion and minimization of surface trap states originating from metal hydroxide formation on their surfaces. Consequently, the best solar cell comprising NaOAc-treated CsPbI3-PQDs shows an improved device performance with a power conversion efficiency (PCE) of 13.3%, as compared with a lead nitrate-treated control device (12.4% PCE). © 2019 | - |
dc.language | English | - |
dc.publisher | Elsevier Ltd | - |
dc.title | Alkali acetate-assisted enhanced electronic coupling in CsPbI3 perovskite quantum dot solids for improved photovoltaics | - |
dc.type | Article | - |
dc.identifier.doi | 10.1016/j.nanoen.2019.104130 | - |
dc.identifier.wosid | 000503062400050 | - |
dc.identifier.scopusid | 2-s2.0-85072693517 | - |
dc.type.local | Article(Overseas) | - |
dc.type.rims | ART | - |
dc.description.journalClass | 1 | - |
dc.contributor.nonIdAuthor | Kim, Jigeon | - |
dc.contributor.nonIdAuthor | Koo, Bonkee | - |
dc.contributor.nonIdAuthor | Ko, Min Jae | - |
dc.identifier.citationVolume | 66 | - |
dc.identifier.citationTitle | Nano Energy | - |
dc.type.journalArticle | Article | - |
dc.description.isOpenAccess | N | - |
dc.subject.keywordAuthor | Colloidal quantum dots | - |
dc.subject.keywordAuthor | CsPbI3 perovskites | - |
dc.subject.keywordAuthor | Sodium acetate | - |
dc.subject.keywordAuthor | Solar cells | - |
dc.subject.keywordAuthor | Solids-state ligand exchange | - |
dc.subject.keywordPlus | Conventional approach | - |
dc.subject.keywordPlus | Ligand exchanges | - |
dc.subject.keywordPlus | Long chain hydrocarbons | - |
dc.subject.keywordPlus | Photovoltaic absorbers | - |
dc.subject.keywordPlus | Photovoltaic performance | - |
dc.subject.keywordPlus | Power conversion efficiencies | - |
dc.subject.keywordPlus | Sodium acetate | - |
dc.subject.keywordPlus | Lead compounds | - |
dc.subject.keywordPlus | Semiconductor quantum dots | - |
dc.subject.keywordPlus | Sodium compounds | - |
dc.subject.keywordPlus | Solar cells | - |
dc.subject.keywordPlus | Solar power generation | - |
dc.subject.keywordPlus | Sols | - |
dc.subject.keywordPlus | Colloidal quantum dots | - |
dc.subject.keywordPlus | Ligands | - |
dc.subject.keywordPlus | Methanol | - |
dc.subject.keywordPlus | Nanocrystals | - |
dc.subject.keywordPlus | Perovskite | - |
dc.subject.keywordPlus | Perovskite solar cells | - |
dc.contributor.affiliatedAuthor | Kim, Wook. Hyun. | - |
dc.contributor.affiliatedAuthor | Choi, Jongmin | - |
dc.contributor.affiliatedAuthor | Choi, Changsoon | - |
dc.contributor.affiliatedAuthor | Lim, Sung Jun | - |
dc.contributor.affiliatedAuthor | Lee, Jong-Soo | - |
dc.contributor.affiliatedAuthor | Kim, Dae-Hwan | - |
dc.contributor.affiliatedAuthor | Kim, Younghoon | - |
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