Chemistry seminar：Light Harvesting and Conversion from Emerging Perovskite Quantum Dots

Details

• Time: 03:00 p.m.-05:00 p.m.
• Date: Mar. 31, 2023
• Venue:SC140 (onsite)  and https://core.xjtlu.edu.cn/mod/bigbluebuttonbn/view.php?id=283114        (BBB link)
• Speaker: Prof. Jianyu Yuan
• Topic:Light Harvesting and Conversion from Emerging Perovskite Quantum Dots

Abstract

Nanometer-sized colloidal metal halide perovskite semiconductors have emerged and brought unique opportunities for photovoltaic application due to the high defect tolerance of perovskite and many features that emerge at the nanoscale. Perovskite quantum dots (QDs) or more broadly, nanocrystals (NCs), show high photoluminescence (PL) quantum yields, spectrally tunable bandgap, flexible compositional control, and crystalline strain benefits. Metal halide perovskite nanocrystals are readily synthesized with exceptional optoelectronic quality opening a route for next generation light emitters, as well as exploring LHP physics at the nanoscale. CsPbX₃ (X=Cl-, Br-, I-, or mixed halide) QDs exhibit PL tunable from ultraviolet to near-infrared wavelengths by adjusting the halide composition and/or QD size

Since the first report in 2016, CsPbI₃ QDs also became a point of interest in PV research. Currently CsPbI₃ holds the record efficiency for QD solar cells (16.6%) proving better than any previous QD material composition. This talk will highlight the unique potential of perovskite QD (PQD) solar cells, from synthesis to devices. We will discuss current state of the art and lay out many open opportunities in perovskite QD solar cells, and the related present and future pursuits in QD preparation and device architecture.

Speake

Dr Jianyu Yuan is currently a Full Professor at the Institute of Functional Nano & Soft Materials (FUNSOM) at Soochow University. He obtained joint Ph.D. degree in materials science from FUNSOM and the University of California, Santa Barbara. He is a visiting professor in some world’s leading photovoltaic research labs like National Renewable Energy Laboratory (NREL), The University of New South Wales.

Now his research is centered on the molecular design and synthesis of innovative, functional organic and inorganic hybrid nanomaterials for applications in photovoltaics, as well as relevant optoelectronics applications. Prof. Yuan has been awarded over 10 research projects from NSFC, MOST and local government. Prof. Yuan’s research has resulted in 20 Chinese patents and more than 140 peer-reviewed publications in prestigious chemistry and materials science journals like Nature Commun., Adv. Mater. Angew. Chem. Int. Ed. etc., which received more than 6500 citations with an H-index of 48.