Two-Dimensional Organic-Inorganic Hybrid Perovskites as Photoactive Semiconductors
Abstract
Abstract:The proposed project, entitled Two-Dimensional Organic-Inorganic Hybrid Perovskites as Photoactive Semiconductors, seeks to understand and control the optical and electronic properties of 2D organic-inorganic hybrid perovskites. Results of the project are expected to demonstrate scalable synthesis of device-level 2D hybrid crystals, provide quantitative assessments of their potential asphotoactive semiconductors, and guide the design of perovskite-based optoelectronics with the featured structural flexibility and property tunability.Hybrid perovskites, with combined advantages of their inorganic or organic predecessors, recently emerged as low-cost, high-performance alternatives to conventional optoelectronic materials. 2D hybrid perovskites, a special class with layered lattice structures, exhibit a variety of unusual physical behaviors owing to the simultaneous electronic and dielectric confinement.Importantly, these physical properties can be deliberately tuned with the unprecedented structural flexibility enabled by the reduced crystal dimensionality and the hybrid organic-inorganic composition. Previous work on 2D hybrid perovskites was primarily carried out using microcrystalline thin films. While showing promising prospects, the randomly oriented and disrupted crystallitessubstantially obscured unique phenomena expected in the low-dimensional lattices. In this project, epitaxial monocrystalline thin films will be used as a platform for investigating fundamental photophysics and charge transport processes intrinsic to the 2D crystals. Not only substantial enhancement is expected in the pristine materials, factors that limited the material performance inprevious studies can also be identified with the versatile control of the morphology, the defects, and the composition. The mechanisms uncovered will set basis for discovering new optoelectronic functionalities facilitated by the naturally assembled multi-quantum well structures in 2D hybrid perovskites.In addition to the advancement in fundamental materials research, outcomes of the project can also be transformative with technological impact. Optoelectronics have been widely applied in many military-related technologies including remote sensing, imaging and displaying, off-grid power generation, and wireless telecommunications. 2D hybrid perovskites can lead to revolutionary advancements to these technologies by offering high-efficient, high-sensitivitybuilding blocks with atomic layer thicknesses. The unusual photoactive functionalities originating from the quantum-confined anisotropic crystal lattices will present a new paradigm for the bright future of organic-inorganic hybrid optoelectronics. The low dimensionality will make the 2Dperovskites excellent candidates for flexible electronics with low power consumption, which can lead to a step-change along the efforts of equipping individuals in the field with light-weight wearable electronics for on-site information monitoring, sharing and processing.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 10, 2018
- Source ID
- N000141812408
Entities
People
- Hanwei Gao
Organizations
- Florida State University
- Office of Naval Research
- United States Navy