Zahid Mehmood - Academia.edu (original) (raw)
Hi, I'm Zahid Mehmood M.Phill Scholar in Physics in the institution of Islamia University of Bahawalpur Rahim Yar Khan Campus.
Supervisors: Dr. Muhammad Junaid
Phone: +923023939540
less
Uploads
Papers by Zahid Mehmood
pubs.acs.org, 2021
Lead-free perovskites are a class of promising optoelectronic materials that emerged recently as ... more Lead-free perovskites are a class of promising optoelectronic materials that emerged recently as a nontoxic and stable alternative to lead halide perovskites. Herein, we report the growth and properties of a Cs4FeBiBr10 single crystal, an example of a new-type A4BB′X10 lead-free metal halide perovskite. High-quality single crystals were grown by a solution temperature-lowering method, and a needle shaped crystal with dimensions up to 4 mm × 1 mm × 1 mm was obtained. The black colored product crystallized in orthorhombic symmetry with Pnma space group as analyzed by single crystal XRD. The existence of Bi octahedra and Fe tetrahedra in the crystal lattice indicates the unique feature of the A4BB′X10 perovskite. The Cs4FeBiBr10 single crystals absorb light across the UV–visible region with an optical band gap of 1.62 eV. Temperature-dependent photoluminescence measurements indicate that the Cs4FeBiBr10 single crystals show photoluminescence emission over a wide range of the spectrum covering UV, green, and red regions. The discovery of the new-type A4BB′X10 family enriches the categories of lead-free perovskites and provides more choices of optically active materials for optoelectronic applications.
Bookmarks Related papers MentionsView impact
pubs.acs.org, 2021
Lead-free perovskites are a class of promising optoelectronic materials that emerged recently as ... more Lead-free perovskites are a class of promising optoelectronic materials that emerged recently as a nontoxic and stable alternative to lead halide perovskites. Herein, we report the growth and properties of a Cs4FeBiBr10 single crystal, an example of a new-type A4BB′X10 lead-free metal halide perovskite. High-quality single crystals were grown by a solution temperature-lowering method, and a needle shaped crystal with dimensions up to 4 mm × 1 mm × 1 mm was obtained. The black colored product crystallized in orthorhombic symmetry with Pnma space group as analyzed by single crystal XRD. The existence of Bi octahedra and Fe tetrahedra in the crystal lattice indicates the unique feature of the A4BB′X10 perovskite. The Cs4FeBiBr10 single crystals absorb light across the UV–visible region with an optical band gap of 1.62 eV. Temperature-dependent photoluminescence measurements indicate that the Cs4FeBiBr10 single crystals show photoluminescence emission over a wide range of the spectrum covering UV, green, and red regions. The discovery of the new-type A4BB′X10 family enriches the categories of lead-free perovskites and provides more choices of optically active materials for optoelectronic applications.
Bookmarks Related papers MentionsView impact