DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kang, Gil-Seong | ko |
dc.contributor.author | Lee, Sungho | ko |
dc.contributor.author | Yeo, Jun-Seok | ko |
dc.contributor.author | Choi, Eun-Su | ko |
dc.contributor.author | Lee, Doh C. | ko |
dc.contributor.author | Na, Seok-In | ko |
dc.contributor.author | Joh, Han-Ik | ko |
dc.date.accessioned | 2019-07-05T06:50:05Z | - |
dc.date.available | 2019-07-05T06:50:05Z | - |
dc.date.created | 2019-07-01 | - |
dc.date.created | 2019-07-01 | - |
dc.date.issued | 2019-09 | - |
dc.identifier.citation | CHEMICAL ENGINEERING JOURNAL, v.372, pp.624 - 630 | - |
dc.identifier.issn | 1385-8947 | - |
dc.identifier.uri | http://hdl.handle.net/10203/262996 | - |
dc.description.abstract | Graphene quantum dots (GQDs) are promising materials for optoelectronic devices because their band-gap, derived from quantum confinement and edge effects, can be easily tuned via their size or surface/edge states. In this paper, a novel approach to synthesize nitrogen-and oxygen-doped GQDs (NO-GQDs) is presented. Nitrogen and oxygen are mainly bound at the GQD edges, resulting in high crystallinity and good electrical properties. A simple solvothermal reaction using N-methyl-2-pyrrolidone (NMP), whose surface energy is similar to that of graphite as a raw material, can simultaneously exfoliate, cut, and finally transform the graphite into the GQDs with heteroatoms derived from the decomposed NMP solution. The synthesized NO-GQDs have a less defective and more selectively edge-functionalized structure compared to other reported GQDs. The electrical properties of NO-GQDs are investigated using them as the additive of hole-transporting materials (HTMs) in an optoelectronic device such as perovskite solar cells (PeSCs). Compared with PEDOT:PSS, a mixture of NO-GQDs and PEDOT:PSS shows a 36.2% increase in the power conversion efficiency (PCE) (maximum PCE: 11.47%) and good device stability. Therefore, it is believed that the improvement of photovoltaics is solely attributed from NO-GQDs which act as a positive role of faster hole transfer. We could confirm that the NO-GQDs facilitate hole-extraction from a photoactive layer and guarantee the more stable operation of PeSCs. | - |
dc.language | English | - |
dc.publisher | ELSEVIER SCIENCE SA | - |
dc.title | Graphene quantum dots with nitrogen and oxygen derived from simultaneous reaction of solvent as exfoliant and dopant | - |
dc.type | Article | - |
dc.identifier.wosid | 000471670400059 | - |
dc.identifier.scopusid | 2-s2.0-85064863269 | - |
dc.type.rims | ART | - |
dc.citation.volume | 372 | - |
dc.citation.beginningpage | 624 | - |
dc.citation.endingpage | 630 | - |
dc.citation.publicationname | CHEMICAL ENGINEERING JOURNAL | - |
dc.identifier.doi | 10.1016/j.cej.2019.04.192 | - |
dc.contributor.localauthor | Lee, Doh C. | - |
dc.contributor.nonIdAuthor | Lee, Sungho | - |
dc.contributor.nonIdAuthor | Yeo, Jun-Seok | - |
dc.contributor.nonIdAuthor | Choi, Eun-Su | - |
dc.contributor.nonIdAuthor | Na, Seok-In | - |
dc.contributor.nonIdAuthor | Joh, Han-Ik | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | Graphene | - |
dc.subject.keywordAuthor | Nitrogen and oxygen doped graphene quantum dots (NO-GQDs) | - |
dc.subject.keywordAuthor | Solvothermal reaction | - |
dc.subject.keywordAuthor | Graphite exfoliation | - |
dc.subject.keywordAuthor | Perovskite solar cells | - |
dc.subject.keywordAuthor | Hole-transporting materials (HTMs) | - |
dc.subject.keywordPlus | LARGE-SCALE PREPARATION | - |
dc.subject.keywordPlus | PEROVSKITE SOLAR-CELLS | - |
dc.subject.keywordPlus | TUNABLE PHOTOLUMINESCENCE | - |
dc.subject.keywordPlus | CARRIER SEPARATION | - |
dc.subject.keywordPlus | OXIDE | - |
dc.subject.keywordPlus | EFFICIENT | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | SIZE | - |
dc.subject.keywordPlus | GRAPHITE | - |
dc.subject.keywordPlus | WATER | - |
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