Journal
JOURNAL OF INFORMATION DISPLAY
Volume 20, Issue 4, Pages 209-216Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/15980316.2019.1655493
Keywords
Cs2SnCl6; lead-free perovskite; doping; photoluminescence; phase transition
Categories
Funding
- Taipei Medical University [TMU107-AE1-B09, USTP-NTUT-TMU-10804]
- National Taipei University of Technology [USTP-NTUT-TMU-108-03]
- Ministry of Science and Technology of Taiwan
- MOST [107-2113-M-027-004]
Ask authors/readers for more resources
Perovskite quantum dots (QDs), such as all-inorganic CsPbX3 (X=Cl, Br, and I), are novel fluorescent semiconductor nanocrystals (NCs) that have attracted tremendous attention due to their excellent optical properties and great applications (e.g. display backlights, light-emitting diodes, and photodetectors). The instability and toxicity of lead-based perovskite QDs, however, are intrinsic defects that obstruct their application and commercialization. Poison is released from the lead of the unstable CsPbX3 NCs, which are generally ascribed to the labile surface, ionic character, and metastable structure. In this work, lead-free Cs2SnCl6 perovskite NCs are successfully synthesized via hot injection. Particularly, by controlling the different precursor ratios, phase transition (CsCl to Cs2SnCl6) was clearly observed from X-ray diffraction (XRD) measurements. The Cs2SnCl6 NCs exhibited a highly efficient deep-blue emission at 425nm, with a 55nm Stokes shift and an 84nm full width at half maximum (FWHM). After doping Mn ions, the preferred formation of CsSnCl3:Mn2+ with double-wavelength emission was demonstrated based on the XRD and photoluminescence spectra. The study showed that doping synthesis should be widely used in lead-free perovskite NCs as an important strategy for next-generation solid-state lighting.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available