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Article: Flexible and Self‐Powered Photodetector Arrays Based on All‐Inorganic CsPbBr3 Quantum Dots

TitleFlexible and Self‐Powered Photodetector Arrays Based on All‐Inorganic CsPbBr3 Quantum Dots
Authors
Keywordsflexible devices
perovskites
photodetector arrays
self‐powered devices
Issue Date2020
PublisherWiley - VCH Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.wiley-vch.de/publish/en/journals/alphabeticIndex/2089
Citation
Advanced Materials, 2020, v. 32 n. 22, p. article no. 2000004 How to Cite?
AbstractFlexible devices are garnering substantial interest owing to their potential for wearable and portable applications. Here, flexible and self‐powered photodetector arrays based on all‐inorganic perovskite quantum dots (QDs) are reported. CsBr/KBr‐mediated CsPbBr3 QDs possess improved surface morphology and crystallinity with reduced defect densities, in comparison with the pristine ones. Systematic material characterizations reveal enhanced carrier transport, photoluminescence efficiency, and carrier lifetime of the CsBr/KBr‐mediated CsPbBr3 QDs. Flexible photodetector arrays fabricated with an optimum CsBr/KBr treatment demonstrate a high open‐circuit voltage of 1.3 V, responsivity of 10.1 A W−1, specific detectivity of 9.35 × 1013 Jones, and on/off ratio up to ≈104. Particularly, such performance is achieved under the self‐powered operation mode. Furthermore, outstanding flexibility and electrical stability with negligible degradation after 1600 bending cycles (up to 60°) are demonstrated. More importantly, the flexible detector arrays exhibit uniform photoresponse distribution, which is of much significance for practical imaging systems, and thus promotes the practical deployment of perovskite products.
Persistent Identifierhttp://hdl.handle.net/10722/290123
ISSN
2020 Impact Factor: 30.849
2020 SCImago Journal Rankings: 10.707
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorShen, K-
dc.contributor.authorXu, H-
dc.contributor.authorLi, X-
dc.contributor.authorGuo, J-
dc.contributor.authorSathasivam, S-
dc.contributor.authorWang, M-
dc.contributor.authorRen, A-
dc.contributor.authorChoy, K-
dc.contributor.authorParkin, IP-
dc.contributor.authorGuo, Z-
dc.contributor.authorWu, J-
dc.date.accessioned2020-10-22T08:22:25Z-
dc.date.available2020-10-22T08:22:25Z-
dc.date.issued2020-
dc.identifier.citationAdvanced Materials, 2020, v. 32 n. 22, p. article no. 2000004-
dc.identifier.issn0935-9648-
dc.identifier.urihttp://hdl.handle.net/10722/290123-
dc.description.abstractFlexible devices are garnering substantial interest owing to their potential for wearable and portable applications. Here, flexible and self‐powered photodetector arrays based on all‐inorganic perovskite quantum dots (QDs) are reported. CsBr/KBr‐mediated CsPbBr3 QDs possess improved surface morphology and crystallinity with reduced defect densities, in comparison with the pristine ones. Systematic material characterizations reveal enhanced carrier transport, photoluminescence efficiency, and carrier lifetime of the CsBr/KBr‐mediated CsPbBr3 QDs. Flexible photodetector arrays fabricated with an optimum CsBr/KBr treatment demonstrate a high open‐circuit voltage of 1.3 V, responsivity of 10.1 A W−1, specific detectivity of 9.35 × 1013 Jones, and on/off ratio up to ≈104. Particularly, such performance is achieved under the self‐powered operation mode. Furthermore, outstanding flexibility and electrical stability with negligible degradation after 1600 bending cycles (up to 60°) are demonstrated. More importantly, the flexible detector arrays exhibit uniform photoresponse distribution, which is of much significance for practical imaging systems, and thus promotes the practical deployment of perovskite products.-
dc.languageeng-
dc.publisherWiley - VCH Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.wiley-vch.de/publish/en/journals/alphabeticIndex/2089-
dc.relation.ispartofAdvanced Materials-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjectflexible devices-
dc.subjectperovskites-
dc.subjectphotodetector arrays-
dc.subjectself‐powered devices-
dc.titleFlexible and Self‐Powered Photodetector Arrays Based on All‐Inorganic CsPbBr3 Quantum Dots-
dc.typeArticle-
dc.identifier.emailGuo, Z: zxguo@hku.hk-
dc.identifier.authorityGuo, Z=rp02451-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1002/adma.202000004-
dc.identifier.pmid32319160-
dc.identifier.scopuseid_2-s2.0-85083701343-
dc.identifier.hkuros317050-
dc.identifier.volume32-
dc.identifier.issue22-
dc.identifier.spagearticle no. 2000004-
dc.identifier.epagearticle no. 2000004-
dc.identifier.isiWOS:000527280900001-
dc.publisher.placeGermany-
dc.identifier.issnl0935-9648-

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