Reversible, Fast, and Wide-Range Oxygen Sensor Based on Nanostructured Organometal Halide Perovskite

Stoeckel, M. -A., Gobbi, M., Bonacchi, S., Liscio, F., Ferlauto, L., Orgiu, E., & Samorì, P. (2017). Reversible, Fast, and Wide-Range Oxygen Sensor Based on Nanostructured Organometal Halide Perovskite. Advanced Materials, 29(38), 1702469. doi:10.1002/adma.201702469
Accès restreint (24-01-2018) Peer reviewed
Version acceptée pour publication (post-print auteur)
Paternité - Pas d'utilisation commerciale [CC] [BY] [NC]
Auteurs Marc-Antoine Stoeckel
Marco Gobbi
Sara Bonacchi
Fabiola Liscio
Laura Ferlauto
Emanuele Orgiu
Paolo Samorì
Unité de recherche du site

University of Strasbourg; CNRS, ISIS UMR 7006; 8 allée Gaspard Monge F-67000 Strasbourg France
Istituto per la Microelettronica e Microsistemi (IMM); Consiglio Nazionale delle Ricerche (CNR); Via Gobetti 101 I-40129 Bologna
Langue

en
Volume

29
Numéro

38
Page de début

1702469
Date de première publication

2017-07-25
ISSN

09359648
Titre de la source

Advanced Materials
Résumé

Nanostructured materials characterized by high surface–volume ratio hold the promise to constitute the active materials for next-generation sensors. Solution-processed hybrid organohalide perovskites, which have been extensively used in the last few
Show moreNanostructured materials characterized by high surface–volume ratio hold the promise to constitute the active materials for next-generation sensors. Solution-processed hybrid organohalide perovskites, which have been extensively used in the last few years for optoelectronic applications, are characterized by a self-assembled nanostructured morphology, which makes them an ideal candidate for gas sensing. Hitherto, detailed studies of the dependence of their electrical characteristics on the environmental atmosphere have not been performed, and even the effect of a ubiquitous gas such as O2 has been widely overlooked. Here, the electrical response of organohalide perovskites to oxygen is studied. Surprisingly, a colossal increase (3000-fold) in the resistance of perovskite-based lateral devices is found when measured in a full oxygen atmosphere, which is ascribed to a trap healing mechanism originating from an O2-mediated iodine vacancies filling. A variation as small as 70 ppm in the oxygen concentration can be detected. The effect is fast (<400 ms) and fully reversible, making organohalide perovskites ideal active materials for oxygen sensing. The effect of oxygen on the electrical characteristics of organohalide perovskites must be taken into deep consideration for the design and optimization of any other perovskite-based (opto-) electronic device working in ambient conditions.
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DOI 10.1002/adma.201702469
Titre abrégé de la source

Adv. Mater.
Type de publication

ACL
Domaine

Chimie/Matériaux
Audience

International