Journal
JOURNAL OF LUMINESCENCE
Volume 239, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jlumin.2021.118396
Keywords
3D-ZnO nanosheets; Semiconductor; Photoluminescence; Chemical bath deposition; CsPbBr3; Cs4PbBr6
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Funding
- Scientific and Technological Research Council of Turkey (TUBITAK) [315M348]
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This study presents a seeding-layer free synthesis method for nanostructured three-dimensional zinc oxide thin films and their sensitization with inorganic perovskite halide semiconductors to enhance emission abilities. The transformation of CsPbBr3 nanocrystals into a composite structure resulted in a significant increase in luminescence. Improved electron transfer was observed for ZnO thin films deposited with Cs4PbBr6-CsPbBr3.
This study reports a seeding-layer free synthesis of nanostructured three-dimensional zinc oxide (3D-ZnO) thin films via a simple and cost-effective chemical bath deposition method (CBD) followed by their sensitization with inorganic perovskite halide semiconductors for luminescence-based applications. The emission abilities of pristine ZnO nanostructures have been enhanced with the incorporation of CsPbBr3 in the cubic crystal phase, which is proven to be a highly stable member of the inorganic halide perovskite family. Additionally, the transformation of CsPbBr3 nanocrystals into Cs4PbBr6-CsPbBr3 composite structure has been attained by altering the (i) CsBr content and (ii) crystallization temperature during the perovskite synthesis step, resulting in a remarkable luminescence increase for the overall structure by -17 folds. A detailed evaluation of defect contents and carrier lifetimes of pristine and perovskite deposited ZnO thin films have been conducted via time-resolved photoluminescence spectroscopy showing an improved electron transfer especially for Cs4PbBr6-CsPbBr3 deposited ZnO thin films.
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