Self-Suspended Nanomesh Scaffold for Ultrafast Flexible Photodetectors Based on Organic Semiconducting Crystals

ZHANG, Lei, PASTHUKOVA, Nadiia, YAO, Yifan, ZHONG, Xiaolan, PAVLICA, Egon, BRATINA, Gvido, ORGIU, Emanuele et SAMORÌ, Paolo, 2018. Self-Suspended Nanomesh Scaffold for Ultrafast Flexible Photodetectors Based on Organic Semiconducting Crystals. Advanced Materials [en ligne]. 12 juillet 2018. Vol. 30, n° 28pp. 1801181. [Consultésans date]. DOI 10.1002/adma.201801181. Consulté de : https://doi.org/10.1002/adma.201801181Self‐standing nanostructures are of fundamental interest in materials science and nanoscience and are widely used in (opto‐)electronic and photonic devices as well as in micro‐electromechanical systems. To date, large‐area and self‐standing nanoelectrode arrays assembled on flexible substrates have not been reported. Here the fabrication of a hollow nanomesh scaffold on glass and plastic substrates with a large surface area over 1 mm2 and ultralow leakage current density (≈1–10 pA mm−2 @ 2 V) across the empty scaffold is demonstrated. Thanks to the continuous sub‐micrometer space formed in between the nanomesh and the bottom electrode, highly crystalline and dendritic domains of 6,13‐bis(triisopropylsilylethinyl)pentacene growing within the hollow cavity can be observed. The high degree of order at the supramolecular level leads to efficient charge and exciton transport; the photovoltaic detector supported on flexible polyethylene terephthalate substrates exhibits an ultrafast photoresponse time as short as 8 ns and a signal‐to‐noise ratio approaching 10^5. Such a hollow scaffold holds great potential as a novel device architecture toward flexible (opto‐)electronic applications based on self‐assembled micro/nanocrystals.1. .
Accès restreint (21-11-2018) Peer reviewed
Version acceptée pour publication (post-print auteur)
Paternité - Pas d'utilisation commerciale [CC] [BY] [NC]
Auteurs Lei Zhang
Nadiia Pasthukova
Yifan Yao
Xiaolan Zhong
Egon Pavlica
Gvido Bratina
Emanuele Orgiu
Paolo Samorì
Unité de recherche du site

Institut de Science et d'Ingénierie Supramoléculaires - ISIS - UMR7006
URL éditeur https://doi.org/10.1002/adma.201801181
Langue

en
Volume

30
Numéro

28
Page de début

1801181
Date de première publication

2018-05-21
Date de parution

2018-07-12
ISSN

09359648
Titre de la source (revue, livre…)

Advanced Materials
Résumé

Self‐standing nanostructures are of fundamental interest in materials science and nanoscience and are widely used in (opto‐)electronic and photonic devices as well as in micro‐electromechanical systems. To date, large‐area and self‐standing
Show moreSelf‐standing nanostructures are of fundamental interest in materials science and nanoscience and are widely used in (opto‐)electronic and photonic devices as well as in micro‐electromechanical systems. To date, large‐area and self‐standing nanoelectrode arrays assembled on flexible substrates have not been reported. Here the fabrication of a hollow nanomesh scaffold on glass and plastic substrates with a large surface area over 1 mm2 and ultralow leakage current density (≈1–10 pA mm−2 @ 2 V) across the empty scaffold is demonstrated. Thanks to the continuous sub‐micrometer space formed in between the nanomesh and the bottom electrode, highly crystalline and dendritic domains of 6,13‐bis(triisopropylsilylethinyl)pentacene growing within the hollow cavity can be observed. The high degree of order at the supramolecular level leads to efficient charge and exciton transport; the photovoltaic detector supported on flexible polyethylene terephthalate substrates exhibits an ultrafast photoresponse time as short as 8 ns and a signal‐to‐noise ratio approaching 10^5. Such a hollow scaffold holds great potential as a novel device architecture toward flexible (opto‐)electronic applications based on self‐assembled micro/nanocrystals.
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DOI 10.1002/adma.201801181
Éditeur

Wiley
Titre abrégé de la source

Adv. Mater.
Type de publication

ACL
Projet(s) de recherche ANR

Labex projects CSC (ANR-10-LABX-0026 CSC) and NIE (ANR-11-LABX-0058 NIE) within the Investissement d’Avenir program ANR-10-IDEX-0002-02
Projet(s) de recherche européen(s)

EC through the ERC Proof-of-Concept project FlexNanoOLED (GA-766936) and the Marie Curie ITN project iSwitch (GA No. 642196)
Domaine

Chimie/Matériaux
Mots-clés

nanofabrication
optoelectronic devices
organic crystalline heterojunctions
π -conjugated materials
PMID 29782659
Unité de recherche extérieure au site

Laboratory of Organic Matter Physics University of Nova Gorica
Fonction

crp
aut
Identifiant ORCID 0000-0001-6256-8281
Audience

International