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Unconventional solution-phase epitaxial growth of organic-inorganic hybrid perovskite nanocrystals on metal sulfide nanosheets

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  • ReceivedApr 4, 2018
  • AcceptedApr 8, 2018
  • PublishedMay 11, 2018

Abstract


Funded by

the National Natural Science Foundation of China(51322202)

and the Young 1000 Talents Global Recruitment Program of China. Xing G acknowledges the financial support from Macau Science and Technology Development Fund(FDCT-116/2016/A3,FDCT-091/2017/A2)

Research Grant(SRG2016-00087-FST)

the Natural Science Foundation of China(91733302,61605073,2015CB932200)

and the Young 1000 Talents Global Recruitment Program of China.


Acknowledgment

This research was supported by the National Natural Science Foundation of China (51322202), and the Young 1000 Talents Global Recruitment Program of China. Xing G acknowledges the financial support from Macau Science and Technology Development Fund (FDCT-116/2016/A3 and FDCT-091/2017/A2), Research Grant (SRG2016-00087-FST) from the University of Macau, the Natural Science Foundation of China (91733302, 61605073 and 2015CB932200), and the Young 1000 Talents Global Recruitment Program of China.


Interest statement

The authors declare no conflict of interest.


Contributions statement

Huang X, Xing G, and Huang W conceived the idea. Zhang Z, Sun F designed the experiments and synthesized the hybrid nanomaterial. Dai J and Sun Q exfoliated MoS2 nanosheets. Zhu Z, Gao K and Shi X performed TEM, XRD and AFM measurements. Wei Q conducted PL and TRPL measurements. Li H, Yan Y and Yu H designed the paper-based photodetectors. All authors contributed to the general discussion.


Author information

Zhipeng Zhang received his bachelor degree in 2015 at Nanjing Tech University. He is now a master student in the Institute of Advanced Materials (IAM) of Nanjing Tech University. His current research interest is the synthesis and applications of perovskite nanocrystals.


Guichuan Xing obtained his BSc in 2003 at Fudan University and PhD in 2011 at National University of Singapore. He joined IAM of Nanjing Tech University as a professor in 2014. His current research interest is nonlinear optical properties and ultrafast carrier dynamics in novel optoelectronic materials and devices.


Xiao Huang received her bachelor's degree from the School of Materials Science and Engineering at Nanyang Technological University in Singapore in 2006 and completed her PhD in 2011 under the supervision of Prof. Hua Zhang and Prof. Freddy Boey. She is currently a professor at the Institute of Advanced Materials (IAM), Nanjing Tech University. Her research interest includes the synthesis and applications of two-dimensional nanomaterial-based hybrids.


Wei Huang received his BSc, MSc, and PhD degrees in Chemistry from Peking University in 1983, 1988, and 1992, respectively. He is a member of the Chinese Academy of Sciences, and a foreign member of the Russian Academy of Sciences. In 2001, he became a chair professor at Fudan University, where he founded the Institute of Advanced Materials. In June 2006, he was appointed the Deputy President of Nanjing University of Posts and Telecommunications, where he founded the Key Laboratory for Organic Electronics and Information Displays. In July 2012, he was appointed the President of Nanjing Tech University and moved to Northwestern Polytechnical University in 2017, where he is currently the Provost of Northwestern Polytechnical University. His research interest includes organic optoelectronics, nanomaterials, flexible electronics, and bioelectronics.


Supplement

Supplementary information

Experimental details and supporting data are available in the online version of the paper.


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  • Figure 1

    (a) Schematic illustration of the formation process of MAPbBr3/MoS2 heterostructures. (b) STEM image of a typical MAPbBr3/MoS2 heterostructure. Photographs of a solution containing as-synthesized MAPbBr3/MoS2 heterostructures (c) under room light and (d) under excitation of a 365 nm laser. (e) Photographs of MoS2 nanosheets in toluene, DMF and toluene/DMF, respectively. (f) Plots of critical concentrations at which (blue) MoS2 nanosheets began to aggregate and (red) MAPbBr3 began to precipitate in a mixed DMF/toluene solution at different DMF concentrations (0–6 v%). (g) XRD patterns of as-prepared MAPbBr3/MoS2 heterostructures, MAPbBr3 NCs and MoS2 nanosheets.

  • Figure 2

    (a) HRTEM image of an area with overlapped lattices of MAPbBr3 and MoS2, and (b) the corresponding FFT-diffraction pattern. (c) MoS2 [001]-zone and (d) MAPbBr3 [001]-zone lattice patterns generated by performing inverse-FFT of the spots forming the blue hexagon and the yellow square in (b), respectively. Insets: the respectively selected spots. (e) Schematic model indicating the MAPbBr3 [100]||MoS2 [100] and MAPbBr3 (001)||MoS2 (001) epitaxial relationship. (f) HRTEM image of another area with overlapped lattices of MAPbBr3 and MoS2, and (g) the corresponding FFT-diffraction pattern. (h) MoS2 [001]-zone and (i) MAPbBr3 [001]-zone lattice patterns generated by performing inverse-FFT of the spots forming the blue hexagon and the yellow square in (g), respectively. Insets: the respectively selected spots. (j) Schematic model indicating the MAPbBr3 [110]||MoS2 [210] and MAPbBr3 (001)||MoS2 (001) epitaxial relationship.

  • Figure 3

    (a) UV-vis absorption and (b) PL spectra of the MAPbBr NCs, MoS2 nanosheets and MAPbBr3/MoS2 heterostructures. (c) Schematic illustration of the energy band alignment at the MAPbBr3/MoS2 heterointerface. (d) TRPL spectra for MAPbBr3 NCs and MAPbBr3/MoS2 heterostructures.

  • Figure 4

    (a) Schematic illustration of the fabrication process of a paper-based photodetector. (b) I–V curves at different light intensity, (c) temporal photocurrent response and (d) a zoom-in view of the temporal photocurrent response of the photodetector based on MAPbBr3/MoS2 heterostructures. (e) I–V curves, (f) temporal photocurrent response and (g) a zoom-in view of the temporal photocurrent response of the photodetector based on MoS2 nanosheets. (h) I–V curves, (i) temporal photocurrent response and (j) a zoom-in view of the temporal photocurrent response of the photodetector based on MAPbBr3/MoS2 heterostructures after they were partially transformed from 1T to 2H phase by irradiation with a 780 nm laser. The light source used for all measurements was a 405 nm laser.

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