Nonradiative energy transfer between doped and undoped flat semiconductor nanocrystals of colloidal quasi-2D nanoplatelets

Aydan Yeltik, Murat Olutas, Manoj Sharma, Kivanc Gungor, Hilmi Volkan Demir

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7 Citations (Scopus)


Atomically flat colloidal semiconductors such as nanoplatelets (NPLs) promise great potential for different optoelectronic applications. Here, we systematically investigate the excitonic energy transfer from colloidal Cu-doped CdSe to undoped core/shell CdSe/CdS nanoplatelets via steady-state and time-resolved photoluminescence spectroscopy techniques. We show the strong quenching in photoluminescence emission of the doped NPL donors together with significant modifications in the time-resolved kinetics by changing the concentration of the undoped NPL acceptors in close proximity. This newly presented all-colloidal and all-quasi-2D doped-undoped NPL-NPL hybrid system shows near-unity roomerature energy transfer efficiency (99%) in solid films. We strongly believe that such highly efficient energy transfer in doped-undoped hybrid films will create more interest in the scientific community to further explore different donor/acceptor combinations with these newly reported doped NPLs for next-generation energy harvesting applications.

Original languageEnglish
Pages (from-to)1470-1476
Number of pages7
JournalJournal of Physical Chemistry C
Issue number2
Publication statusPublished - 17 Jan 2019
Externally publishedYes

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