A versatile light-switchable nanorod memory: Wurtzite ZnO on perovskite SrTiO3

Anup Bera Kumar, Haiyang Peng, James Lourembam, Youde Shen, Xiaowei Sun, Tao Wu

Research output: Contribution to journalArticlepeer-review

152 Scopus citations


Integrating materials with distinct lattice symmetries and dimensions is an effective design strategy toward realizing novel devices with unprecedented functionalities, but many challenges remain in synthesis and device design. Here, a heterojunction memory made of wurtzite ZnO nanorods grown on perovskite Nb-doped SrTiO3 (NSTO) is reported, the electronic properties of which can be drastically reconfigured by applying a voltage and light. Despite of the distinct lattice structures of ZnO and NSTO, a consistent nature of single crystallinity is achieved in the heterojunctions via the low-temperature solution-based hydrothermal growth. In addition to a high and persistent photoconductivity, the ZnO/NSTO heterojunction diode can be turned into a versatile light-switchable resistive switching memory with highly tunable ON and OFF states. The reversible modification of the effective interfacial energy barrier in the concurrent electronic and ionic processes most likely gives rise to the high susceptibility of the ZnO/NSTO heterojunction to external electric and optical stimuli. Furthermore, this facile synthesis route is promising to be generalized to other novel functional nanodevices integrating materials with diverse structures and properties. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Original languageEnglish (US)
Pages (from-to)4977-4984
Number of pages8
JournalAdvanced Functional Materials
Issue number39
StatePublished - Apr 25 2013

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This work is partially supported by the National Research Foundation of Singapore through the Competitive Research Programme (CRP Award No. NRF-CRP-4-2008-04), the Science and Engineering Research Council, Agency for Science, Technology and Research (A*STAR) of Singapore (project No. 092 151 0088), and the National Natural Science Foundation of China (NSFC) (project Nos. 61006037 and 61076015).

ASJC Scopus subject areas

  • Biomaterials
  • Electrochemistry
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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