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dc.contributor.authorKang, Chun Hong
dc.contributor.authorDursun, Ibrahim
dc.contributor.authorLiu, Guangyu
dc.contributor.authorSinatra, Lutfan
dc.contributor.authorSun, Xiaobin
dc.contributor.authorKong, Meiwei
dc.contributor.authorPan, Jun
dc.contributor.authorMaity, Partha
dc.contributor.authorOoi, Ee-Ning
dc.contributor.authorNg, Tien Khee
dc.contributor.authorMohammed, Omar F.
dc.contributor.authorBakr, Osman
dc.contributor.authorOoi, Boon S.
dc.date.accessioned2019-10-17T05:44:50Z
dc.date.available2019-10-17T05:44:50Z
dc.date.issued2019-10-16
dc.identifier.citationKang, C. H., Dursun, I., Liu, G., Sinatra, L., Sun, X., Kong, M., … Ooi, B. S. (2019). High-speed colour-converting photodetector with all-inorganic CsPbBr3 perovskite nanocrystals for ultraviolet light communication. Light: Science & Applications, 8(1). doi:10.1038/s41377-019-0204-4
dc.identifier.doi10.1038/s41377-019-0204-4
dc.identifier.urihttp://hdl.handle.net/10754/658646
dc.description.abstractOptical wireless communication (OWC) using the ultra-broad spectrum of the visible-to-ultraviolet (UV) wavelength region remains a vital field of research for mitigating the saturated bandwidth of radio-frequency (RF) communication. However, the lack of an efficient UV photodetection methodology hinders the development of UV-based communication. The key technological impediment is related to the low UV-photon absorption in existing silicon photodetectors, which offer low-cost and mature platforms. To address this technology gap, we report a hybrid Si-based photodetection scheme by incorporating CsPbBr3 perovskite nanocrystals (NCs) with a high photoluminescence quantum yield (PLQY) and a fast photoluminescence (PL) decay time as a UV-to-visible colour-converting layer for high-speed solar-blind UV communication. The facile formation of drop-cast CsPbBr3 perovskite NCs leads to a high PLQY of up to ~73% and strong absorption in the UV region. With the addition of the NC layer, a nearly threefold improvement in the responsivity and an increase of ~25% in the external quantum efficiency (EQE) of the solar-blind region compared to a commercial silicon-based photodetector were observed. Moreover, time-resolved photoluminescence measurements demonstrated a decay time of 4.5 ns under a 372-nm UV excitation source, thus elucidating the potential of this layer as a fast colour-converting layer. A high data rate of up to 34 Mbps in solar-blind communication was achieved using the hybrid CsPbBr3–silicon photodetection scheme in conjunction with a 278-nm UVC light-emitting diode (LED). These findings demonstrate the feasibility of an integrated high-speed photoreceiver design of a composition-tuneable perovskite-based phosphor and a low-cost silicon-based photodetector for UV communication.
dc.description.sponsorshipThis work is supported by funding from King Abdullah University of Science and Technology (KAUST), BAS/1/1614-01-01, KCR/1/2081-01-01 and GEN/1/6607-01-01, and the KAUST-KFUPM Special Initiative, REP/1/2878-01-01. The authors gratefully acknowledge the financial support from the King Abdulaziz City for Science and Technology (KACST), Grant no. KACST TIC R2-FP-008.
dc.publisherSpringer Science and Business Media LLC
dc.relation.urlhttp://www.nature.com/articles/s41377-019-0204-4
dc.rightsArchived with thanks to Light: Science & Applications
dc.titleHigh-speed colour-converting photodetector with all-inorganic CsPbBr3 perovskite nanocrystals for ultraviolet light communication
dc.typeArticle
dc.contributor.departmentChemical Science Program
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentElectrical Engineering Program
dc.contributor.departmentFunctional Nanomaterials Lab (FuNL)
dc.contributor.departmentKAUST Catalysis Center (KCC)
dc.contributor.departmentKAUST Solar Center (KSC)
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhotonics Laboratory
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentUltrafast Laser Spectroscopy and Four-dimensional Electron Imaging Research Group
dc.identifier.journalLight: Science & Applications
dc.eprint.versionPublisher's Version/PDF
kaust.personKang, Chun Hong
kaust.personDursun, Ibrahim
kaust.personLiu, Guangyu
kaust.personSinatra, Lutfan
kaust.personSun, Xiaobin
kaust.personKong, Meiwei
kaust.personMaity, Partha
kaust.personOoi, Ee-Ning
kaust.personNg, Tien Khee
kaust.personMohammed, Omar F.
kaust.personBakr, Osman M.
kaust.personOoi, Boon S.
kaust.grant.numberBAS/1/1614-01-01
kaust.grant.numberGEN/1/6607-01-01
kaust.grant.numberKCR/1/2081-01-01
kaust.grant.numberREP/1/2878-01-01
refterms.dateFOA2019-10-17T05:47:47Z
kaust.acknowledged.supportUnitKAUST-KFUPM Special Initiative
dc.date.published-online2019-10-16
dc.date.published-print2019-12


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