The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here:

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Portrait of Tönu Pullerits; Photo: Kennet Ruona

Tönu Pullerits


Portrait of Tönu Pullerits; Photo: Kennet Ruona

Sandwiched confinement of quantum dots in graphene matrix for efficient electron transfer and photocurrent production.


  • Nan Zhu
  • Kaibo Zheng
  • Khadga Jung Karki
  • Mohamed Qenawy
  • Qiushi Zhu
  • Stefan Carlson
  • Dörthe Haase
  • Karel Zidek
  • Jens Ulstrup
  • Sophie Canton
  • Tönu Pullerits
  • Qijin Chi

Summary, in English

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.


  • Chemical Physics
  • MAX IV Laboratory
  • NanoLund: Center for Nanoscience

Publishing year





Scientific Reports



Document type

Journal article


Nature Publishing Group


  • Physical Chemistry




  • ISSN: 2045-2322