Development of Lead Halide Perovskites for Optoelectronic Applications
Abstract
Hybrid organic-inorganic and all-inorganic halide perovskites are currently widely studied as novel optoelectronic materials for applications in solar cells, light emitting diodes and phosphors (single color, white light sources), lasers, as well as X-ray and gamma-ray detection. Critical materials issues to be addressed for improved device performance include efficiencies, temperature sensitivity, long-term stability, and toxicity. In this project, materials development and spectroscopic studies are proposed to investigate all-inorganic lead halide perovskites of type APbX3 and A4PbX6 (with A=Cs, Rb, Tl, and X=Cl, Br, I). Compared to hybrid organic-inorganic systems, all-inorganic lead halide perovskites (e.g. CsPbX3 structures) offer advantages in reduced temperature sensitivity, long-term stability, and potential integration in optoelectronic circuits. The proposed research includes the development of high purity single crystals of lead halide perovskites from the melt using Bridgman technique. Comparative studies of bulk single crystals, thin-films, and micro/nano-sized particles will be performed in order to determine the intrinsic material properties of lead halide perovskites. Furthermore, the research will include doping studies using rare earth and transition metal ions to explore extended emission tunability and possible improvements in material stability. The proposed research includes material purification studies of commercial halide salts, synthesis of lead halide perovskites, single crystal growth, thin-film preparation using physical vapor deposition techniques, and micro/nano-material synthesis using solution based methods as well as solid-state mechano-chemical synthesis. The lead halide perovskite materials will be characterized for their structural, electrical, and optical properties. Special focus of the work performed at HU will be on steady-state and time-resolved laser-induced fluorescence spectroscopy to explore the emission properties of undoped perovskites as well as RE/TM doped materials. The most promising lead halide perovskites will be tested in collaboration with researchers at Brimrose Technology Corporation for light source applications (LEDs, phosphors, lasers) and radiation detection (scintillators, semiconductor detectors).
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Feb 19, 2019
- Source ID
- W911NF1810447
Entities
People
- Uwe Hömmerich
Organizations
- Army Contracting Command
- Hampton University
- Office of the Secretary of Defense