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Search: WFRF:(Chi Qijin) > (2015)

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  • Zhu, Nan, et al. (author)
  • Sandwiched confinement of quantum dots in graphene matrix for efficient electron transfer and photocurrent production.
  • 2015
  • In: Scientific Reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 5
  • Journal article (peer-reviewed)abstract
    • Quantum dots (QDs) and graphene are both promising materials for the development of new-generation optoelectronic devices. Towards this end, synergic assembly of these two building blocks is a key step but remains a challenge. Here, we show a one-step strategy for organizing QDs in a graphene matrix via interfacial self-assembly, leading to the formation of sandwiched hybrid QD-graphene nanofilms. We have explored structural features, electron transfer kinetics and photocurrent generation capacity of such hybrid nanofilms using a wide variety of advanced techniques. Graphene nanosheets interlink QDs and significantly improve electronic coupling, resulting in fast electron transfer from photoexcited QDs to graphene with a rate constant of 1.3 × 10(9) s(-1). Efficient electron transfer dramatically enhances photocurrent generation in a liquid-junction QD-sensitized solar cell where the hybrid nanofilm acts as a photoanode. We thereby demonstrate a cost-effective method to construct large-area QD-graphene hybrid nanofilms with straightforward scale-up potential for optoelectronic applications.
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Type of publication
journal article (1)
Type of content
peer-reviewed (1)
Author/Editor
Zhu, Qiushi (1)
Zhu, Nan (1)
Žídek, Karel (1)
Chi, Qijin (1)
Zheng, Kaibo (1)
Carlson, Stefan (1)
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Pullerits, Tönu (1)
Canton, Sophie (1)
Haase, Dörthe (1)
Karki, Khadga Jung (1)
Qenawy, Mohamed (1)
Ulstrup, Jens (1)
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University
Lund University (1)
Language
English (1)
Research subject (UKÄ/SCB)
Natural sciences (1)
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