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2025年巴黎高科 - CSC合作公派读博项目 - 课题No.50
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2025年巴黎高科 - CSC合作公派读博项目 - 课题No.50 2025 巴黎高科 - CSC公派博士项目 （12月8日截止） 网申通道：https://paristech.kosmopolead.com/phd 申请攻略：https://paristech.fr/fr/paristech-csc-phd-program-how-apply 课题50详情: TITLE: MICROSCOPIC OPTICAL MANIPULATION OF THE PHASE TRANSITIONS IN ORGANO-METAL HALIDE PEROVSKITES Topic number : 2024_050 Field : Physics, Optics - Chemistry, Physical chemistry and Chemical Engineering - Material science, Mechanics and Fluids Subfield: Materials Science ParisTech School: ESPCI Paris - PSL Research team : Micro & Nano Characterization (MNC) Group Research team website: https://www.espci.psl.eu/recherche/labos/lpem/mnc/index.html Research lab: LPEM - Laboratoire Physique et d'études des matériaux Lab location: Paris Lab website: https://www.lpem.espci.fr/spip.php?rubrique4 Contact point for this topic: CHEN Zhuoying, zhuoying.chen@espci.fr Advisor 1: Zhuoying CHEN - zhuoying.chen@espci.fr Advisor 2: Lionel AIGOUY - lionel.aigouy@espci.fr Advisor 3: Advisor 4: Short description of possible research topics for a PhD: Phase-change materials emerge recently as a fascinating topic. Materials that undergo structural phase transitions exhibit significantly different optical, electronic, and thermal properties, which arise from the unique atomic configurations associated with each crystal structure. This topic is challenging because many semiconductors cannot be switched between different phases reversibly without being deteriorated. To this regard, organo-metal halide perovskites, in particular, the family of all-inorganic CsPbI3-xBrx, exhibit interesting near room-temperature perovskite-to- non-perovskite phase transitions, leading to thermochromic behavior occurring at a transition temperature tunable by halide compositions. While the thermally-induced phase transitions in this family of perovskites have been demonstrated, (ref. 1) it remains unexplored whether one can induce such phase transitions optically, for example, by photothermal means. In addition, manipulating the phase transition down to the nano/micro-scale has not been demonstrated in this family of perovskite materials. This PhD project proposes to investigate, from fundamental views, the possibility of local optical manipulations of the phase transitions and the resultant optically-induced thermochromic behavior of a series of organo-metal halide perovskites thin films. We will focus on the study of light-matter interaction, aiming to boost the capacity of the photothermal effect to achieve optically-induced phase transitions with and without plasmonic nanostructures (examples c.f. our previous work ref. (2-5)). It can be anticipated that through this study we will gain fundamental understanding of how the phase transitions in this family of materials occur at the nano/micro-scale and the optical and photothermal means to control them. References: (1) J. Lin et al., Nature Materials, 17, 261-267 (2018). DOI: 10.1038/s-41563-017-0006-0. (2) Z. Fang et al., Adv. Electronic Mater., 2400249 (2024). DOI: 10.1002/aelm.202400249. (3) C. Xin et al., Materials Today Energy, 22, 100859 (2021). DOI: 10.1016/j.mtener.2021.100859 (4) H. Xiang et al., Energy Technology, 10, 2200757 (2022). DOI: 10.1002/ente.202200757 (5) H. Xiang et al., Small, 14(16), 1704013 (2018). DOI: 10.1002/smll.201704013 Required background of the student: Solid academic background and a Master Degree on chemistry, material science, or applied physics. Good speaking & writing skills in English. Passionate in scientific experiments. A list of (5 max.) representative publications of the group: (Related to the research topic) 1. Z. Fang et al., Adv. Electronic Mater., 2400249 (2024). DOI: 10.1002/aelm.202400249. 2. C. Xin et al., Materials Today Energy, 22, 100859 (2021). DOI: 10.1016/j.mtener.2021.100859 3. H. Xiang et al., Small, 14(16), 1704013 (2018). DOI: 10.1002/smll.201704013 |
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