10.1002/anie.201712608
Angewandte Chemie International Edition
COMMUNICATION
a significant photocurrent (Figure 5c). It is important to note the
photocurrent enhancement is observed in the same sweep voltage
range as for the FLBP device alone for which no photocurrent was
observed. Further, the composite device was tested in the time
dependent chopping mode to see the response and recovery of the
device in multiple cycles (Figure 5d). As could be seen the device
responds quickly under light illumination and recovers soon in the dark.
These data imply that significant density of photogenerated carriers
generated in the CsPbBr3 QDs is indeed transferred to FLBP and the
latter transports them to the electrodes leading to the observed photo-
induced conductivity.
Keywords: Few layer black phosphorus
• self-assembled
CsPbBr3 quantum dots • photoluminescence quenching • Type I
band alignment
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For details, please see the experimental section in supporting
information.
Preparation of self-assembled CsPbBr3 quantum dots (QDs) on FLBP:
Self-assembly CsPbBr3 QDs on FLBP was realized following solvent exchange
in toluene. Colloidal CsPbBr3 QDs solution with 0.7 x 10-8 M concentration was
initially added with variable concentrations of FLBP (0.1, 0.3 and 0.4 mg)
followed by the bath sonication at room temperature.
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Acknowledgements
The authors will like to acknowledge funding support from DST (Govt.
of India) under the Nanomission Thematic Unit program as well as the
CERI program. PP would like to thank UGC for funding under D. S.
Kothari post-doctoral fellowship program vide ref. no. 201617- PH/15–
16/0097.
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