Enhanced coloration for hybrid niobium-based electrochromic devices
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | MJEJRI, Issam | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | GROCASSAN, Romain | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | ROUGIER, Aline | |
| dc.date.issued | 2018 | |
| dc.identifier.issn | 2574-0962 | |
| dc.description.abstractEn | Niobium pentoxide, Nb2O5, exists in many polymorphs with diverse properties and morphologies that are dependent on the synthesis route. In this work, we design a new approach to fabricate and stabilize the metastable polymorph hexagonal nano-niobium pentoxide using soft chemistry and in particular the polyol synthesis. The electrochromic properties of homogeneous niobium pentoxide thin films deposited by dip coating, from as-synthesized hexagonal powder, are studied in lithium trifluoromethanesulfonimide (LiTFSI) in 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide (EMITFSI) ionic liquid electrolyte versus Pt as counter electrode. The structure and morphology of the Nb2O5 thin films before and after cycling are characterized by ex-situ XRD and SEM while their optical and electrochemical properties are investigated by in-situ transmittance and cyclic voltammetry (CV), respectively. Thin films made from hexagonal Nb2O5 with a sphere architecture exhibit good cycling stability, high transmittance modulations (ΔT ≈ 33% at 550 nm), fast switching speeds (2–3 s for coloration and bleaching at 550 nm), and high coloration efficiency (CE ≈ 26 cm2 C–1) with a good quality factor G(λ) = 10.4 cm2 C–1 s–1. Finally, novel electrochromic devices based on hybrid thin films combining poly(ethylene-3,4-dioxythiophene):poly(styrenesulfonicacid) (PEDOT:PSS) and oxides are assembled showing enhanced coloration and simultaneous color change due to their double-sided configuration. | |
| dc.language.iso | en | |
| dc.publisher | ACS | |
| dc.subject.en | polyol synthesis | |
| dc.subject.en | hybrid device | |
| dc.subject.en | nanoparticles | |
| dc.subject.en | dip coating | |
| dc.subject.en | niobium oxide | |
| dc.subject.en | electrochromic performances | |
| dc.title.en | Enhanced coloration for hybrid niobium-based electrochromic devices | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1021/acsaem.8b00967 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | ACS Applied Energy Materials | |
| bordeaux.page | 4359-4366 | |
| bordeaux.volume | 1 | |
| bordeaux.issue | 8 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-01865041 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-01865041v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=ACS%20Applied%20Energy%20Materials&rft.date=2018&rft.volume=1&rft.issue=8&rft.spage=4359-4366&rft.epage=4359-4366&rft.eissn=2574-0962&rft.issn=2574-0962&rft.au=MJEJRI,%20Issam&GROCASSAN,%20Romain&ROUGIER,%20Aline&rft.genre=article |
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