SYNTHESIS AND CHARACTERIZATION OF TWO DIMENSIONAL HYBRID ORGANO-METAL HALIDE PEROVSKITE: ELECTRONIC AND OPTICAL PROPERTIES AND THEIR ACTIVITY IN OPTOELECTRONIC APPLICATIONS
Abstract
This proposal focuses on investigating two-dimension organic-inorganic perovskite as a stable alternative to 3D perovskite, preserving the attractive and promising characteristics of the latter. The additional long organic cation, which is added to the perovskite structure (in the 2D structure), is expected to provide hydrophobicity, which will enhance the resistivity of the perovskite to humidity. In view of this, 2D perovskites will be synthesized using various long organic cations that possess different structural and optical properties. Along with the morphological and chemical properties that are altered by the transition to layered crystals, other aspects such as band gap, exciton binding, and carrier mobilities are also tuned. In order to take advantage of the synthetic tailoring of this family of materials, these properties must be characterized as a function of the number of layers and regarding composition. In addition, the fundamental question regarding radiative recombination in PV devices based on the 2D perovskite will be studied. In order to tackle this research question the PV activity and LED response of the synthesized 2D and quasi-2D perovskites will be tested. The same device architecture will be used for the PV and LED measurements. Using this reciprocal device, it will be possible to have an understanding on the radiative efficiency limit of perovskite solar cell and how to improve it by maximizing its electroluminescence (EL) performance through device texturing in terms of the perovskite dimensionality, quality and architecture. Based on the solar cell and the EL efficiency at various perovskite’s dimensionality, the deviation in the open circuit voltage from the Shockley–Queisser limit will be calculated.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 11, 2021
- Source ID
- FA86552017042
Entities
People
- Lioz Etgar
Organizations
- Air Force Office of Scientific Research
- Hebrew University of Jerusalem
- United States Air Force