High-efficiency optical gain in Type-II semiconductor nanocrystals of alloyed colloidal quantum wells

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dc.authorid0000-0003-1616-2728en_US
dc.authorid0000-0002-8351-3690en_US
dc.authorid0000-0002-8192-3960
dc.authorid0000-0003-1977-6485
dc.authorid0000-0002-6250-6977
dc.contributor.authorGüzeltürk, Burak
dc.contributor.authorKeleştemur, Yusuf
dc.contributor.authorOlutaş, Murat
dc.contributor.authorLi, Quyang
dc.contributor.authorLian, Tianquan
dc.date.accessioned2021-06-23T19:45:08Z
dc.date.available2021-06-23T19:45:08Z
dc.date.issued2017
dc.departmentBAİBÜ, Fen Edebiyat Fakültesi, Fizik Bölümüen_US
dc.description.abstractColloidal nanocrystals having controlled size, tailored shape, and tuned composition have been explored for optical gain and lasing. Among these, nanocrystals having Type-II electronic structure have been introduced toward low-threshold gain. However, to date, their performance has remained severely limited due to diminishing oscillator strength and modest absorption cross-section. Overcoming these problems, here we realize highly efficient optical gain in Type-II nanocrystals by using alloyed colloidal quantum wells. With composition-tuned core/alloyed-crown CdSe/CdSexTe1-x quantum wells, we achieved amplified spontaneous emission thresholds as low as 26 mu J/cm(2), long optical gain lifetimes (tau(gain) approximate to 400 ps), and high modal gain coefficients (g(modal) approximate to 930 cm(-1)). We uncover that the optical gain in these Type-II quantum wells arises from the excitations localized to the alloyed-crown region that are electronically coupled to the charge-transfer state. These alloyed heteronanostructures exhibiting remarkable optical gain performance are expected to be highly appealing for future display and lighting technologies.en_US
dc.identifier.doi10.1021/acs.jpclett.7b02367
dc.identifier.endpage5324en_US
dc.identifier.issn1948-7185
dc.identifier.issue21en_US
dc.identifier.pmid29022715en_US
dc.identifier.scopus2-s2.0-85032841492en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage5317en_US
dc.identifier.urihttps://doi.org/10.1021/acs.jpclett.7b02367
dc.identifier.urihttps://hdl.handle.net/20.500.12491/9104
dc.identifier.volume8en_US
dc.identifier.wosWOS:000414623000014en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.institutionauthorOlutaş, Murat
dc.language.isoenen_US
dc.publisherAmer Chemical Socen_US
dc.relation.ispartofJournal Of Physical Chemistry Lettersen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectColloidal Nanocrystalsen_US
dc.subjectType-II
dc.subjectType-II Semiconductor Nanocrystals
dc.subjectAlloyed Colloidal Quantum Wells
dc.titleHigh-efficiency optical gain in Type-II semiconductor nanocrystals of alloyed colloidal quantum wellsen_US
dc.typeLetteren_US

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