FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W3205110545> ?p ?o ?g. }

• W3205110545 abstract "Author(s): Lai, Minliang | Advisor(s): Yang, Peidong | Abstract: Lead-halide perovskites are a family of semiconductor materials with excellent optoelectronic properties ideally suited for next-generation photovoltaic and light-emitting applications. Particularly, inorganic perovskites CsPbX3 are drawing increasing research interests owing to their enhanced stability toward moisture, oxygen, and heat, compared to the organic-inorganic hybrid perovskites (e.g. methylammonium lead iodide). However, the fundamental understandings of intrinsic physical properties in inorganic perovskites are still elusive.Comparing to traditional semiconductors, the halide perovskites have highly reconfigurable crystal structure with relatively easy structural rearrangements and facile ion migration. In chapter 1, the brief introduction of halide perovskites and their unique soft ionic lattice is discussed. There are rich structural phase transitions in the inorganic perovskites owing to their soft and dynamical ionic lattice. The fundamental understanding of intrinsic phase transition behavior is still elusive as the previous study mostly focus on the inhomogenous polycrystalline thin film. Semiconductor nanowires are considered as a good perform for studying their intrinsic physical properties and potential building blocks for various applications in electronics, optoelectronics and energy harvesting. In chapter 2, I developed a novel synthetic method to grow CsPbI3 nanowires, which serve an excellent platform to the intrinsic phase transition. CsPbI3 nanowires undergo a structural phase transition from a non-perovskite to a perovskite phase with thermal heating with significant differences in optical and electric properties. The transformed perovskite phase exhibits meta-stability in inert atmosphere. In chapter 3, we discuss that moisture could introduce halide vacancy in the crystal lattice and lowers the kinetic barrier from perovskite phase to non-perovskite phase, resulting in a reverse phase transition. Via stable, controllable and reversible phase transition, we further realize robust thermochromic solar cells for smart photovoltaic window applications. Another feature of the soft ionic lattice is facile ion migration. Anion exchange chemistry was demonstrated in CsPbX3 nanostructures with high photoluminescence efficiency throughout the exchange reaction. Nanostructured perovskite heterojunctions are considered as promising building components to extension in high-density modern optoelectronic applications. In chapter 4, we demonstrate CsPbX3 nanowire halide heterojunctions via developing a novel localized anion exchange. These well-defined heterostructures show high spatially resolved down to about 500 nm with RGB multi-color emission, which represent key building blocks for high-resolution displays. Similarly, CsSnBr3-CsPbBr3 cation heterojunction nanowires can be further realized via localized cation exchange. Beyond potential device applications, Nanostructured perovskite heterojunctions enable rich fundamental study, such as the solid-state ion interdiffusion dynamics. In chapter 5, the intrinsic solid-solid anion exchange dynamics can be spatially resolved in these perovskite hetero-junction nanowires through confocal imaging techniques. The intrinsic anion diffusivity in single-crystalline system can be obtained quantitatively. Halide diffusivities were found to be between 10−13 and ∼10−12 cm2/second at about 100 °C, which are several orders of magnitudes lower than those reported in polycrystalline thin films. Vacancy formation free energies computed from molecular simulation are small due to the easily deformable perovskite lattice, accounting for the high equilibrium vacancy concentration.In a short summary, during my Ph.D research, I have done pioneering work on inorganic perovskite CsPbX3 (X = Cl, Br, I) nanowires synthesis and the systematical study of phase transition dynamics and anion exchange using these single-crystal nanowires platform. My work not only enriches the fundamental understandings in this new class of semiconductor materials but also offer guidelines for engineering the perovskite materials with novel functional devices." @default.
• W3205110545 created "2021-10-25" @default.
• W3205110545 creator A5057303247 @default.
• W3205110545 date "2019-01-01" @default.
• W3205110545 modified "2023-09-27" @default.
• W3205110545 title "Phase transition and ion transport in lead halide perovskite nanostructures" @default.
• W3205110545 hasPublicationYear "2019" @default.
• W3205110545 type Work @default.
• W3205110545 sameAs 3205110545 @default.
• W3205110545 citedByCount "0" @default.
• W3205110545 crossrefType "journal-article" @default.
• W3205110545 hasAuthorship W3205110545A5057303247 @default.
• W3205110545 hasConcept C108225325 @default.
• W3205110545 hasConcept C121332964 @default.
• W3205110545 hasConcept C137637335 @default.
• W3205110545 hasConcept C145148216 @default.
• W3205110545 hasConcept C149288129 @default.
• W3205110545 hasConcept C155011858 @default.
• W3205110545 hasConcept C159467904 @default.
• W3205110545 hasConcept C171250308 @default.
• W3205110545 hasConcept C171560689 @default.
• W3205110545 hasConcept C178790620 @default.
• W3205110545 hasConcept C179104552 @default.
• W3205110545 hasConcept C185592680 @default.
• W3205110545 hasConcept C191897082 @default.
• W3205110545 hasConcept C192562407 @default.
• W3205110545 hasConcept C2182769 @default.
• W3205110545 hasConcept C26873012 @default.
• W3205110545 hasConcept C49040817 @default.
• W3205110545 hasConcept C74214498 @default.
• W3205110545 hasConcept C8010536 @default.
• W3205110545 hasConceptScore W3205110545C108225325 @default.
• W3205110545 hasConceptScore W3205110545C121332964 @default.
• W3205110545 hasConceptScore W3205110545C137637335 @default.
• W3205110545 hasConceptScore W3205110545C145148216 @default.
• W3205110545 hasConceptScore W3205110545C149288129 @default.
• W3205110545 hasConceptScore W3205110545C155011858 @default.
• W3205110545 hasConceptScore W3205110545C159467904 @default.
• W3205110545 hasConceptScore W3205110545C171250308 @default.
• W3205110545 hasConceptScore W3205110545C171560689 @default.
• W3205110545 hasConceptScore W3205110545C178790620 @default.
• W3205110545 hasConceptScore W3205110545C179104552 @default.
• W3205110545 hasConceptScore W3205110545C185592680 @default.
• W3205110545 hasConceptScore W3205110545C191897082 @default.
• W3205110545 hasConceptScore W3205110545C192562407 @default.
• W3205110545 hasConceptScore W3205110545C2182769 @default.
• W3205110545 hasConceptScore W3205110545C26873012 @default.
• W3205110545 hasConceptScore W3205110545C49040817 @default.
• W3205110545 hasConceptScore W3205110545C74214498 @default.
• W3205110545 hasConceptScore W3205110545C8010536 @default.
• W3205110545 hasLocation W32051105451 @default.
• W3205110545 hasOpenAccess W3205110545 @default.
• W3205110545 hasPrimaryLocation W32051105451 @default.
• W3205110545 hasRelatedWork W2224609287 @default.
• W3205110545 hasRelatedWork W2591313248 @default.
• W3205110545 hasRelatedWork W2711335539 @default.
• W3205110545 hasRelatedWork W2735016949 @default.
• W3205110545 hasRelatedWork W2793998846 @default.
• W3205110545 hasRelatedWork W2799555066 @default.
• W3205110545 hasRelatedWork W2804609244 @default.
• W3205110545 hasRelatedWork W2950167219 @default.
• W3205110545 hasRelatedWork W2952264384 @default.
• W3205110545 hasRelatedWork W2972681899 @default.
• W3205110545 hasRelatedWork W2998239390 @default.
• W3205110545 hasRelatedWork W3007131283 @default.
• W3205110545 hasRelatedWork W3020144358 @default.
• W3205110545 hasRelatedWork W3024418976 @default.
• W3205110545 hasRelatedWork W3092966509 @default.
• W3205110545 hasRelatedWork W3126825005 @default.
• W3205110545 hasRelatedWork W3131491801 @default.
• W3205110545 hasRelatedWork W3157343792 @default.
• W3205110545 hasRelatedWork W3194118686 @default.
• W3205110545 hasRelatedWork W3213978448 @default.
• W3205110545 isParatext "false" @default.
• W3205110545 isRetracted "false" @default.
• W3205110545 magId "3205110545" @default.
• W3205110545 workType "article" @default.