Multi-faceted Low-dimensional Halide Perovskites by Professor Sayan Bhattacharyya

24 Oct 2025 10.00 AM - 11.00 AM MSE Meeting Room (N4.1-01-28) Alumni, Current Students

NTU MSE Seminar Hosted by Prof Nripan Mathews

Abstract

Low-dimensional halide perovskites featuring 'molecular-level' dimensional reduction exhibit enhanced resistance to moisture and heat compared to their three-dimensional counterparts for a plethora of applications ranging from photovoltaics, optoelectronics, photocatalysis, spintronics, actuators, chemical storage and sensing.1-7 In these systems, the hydrophobic alkyl ammonium spacers separate the inorganic octahedral layers, giving rise to tunable structure-property correlations, depending on the organic and inorganic counterparts. These systems can be stabilized in the form of single crystals or nanostructures via the hot-injection technique. This lecture will show a superspace investigation of the stacking faults in a Ruddlesden-Popper nanoplatelet superlattice, reversible gas storage and light-triggered rhythmic ballet of the nanoplatelets. 

References 
1. Hazra, V.; Mandal, A.; Bhattacharyya, S. Chem. Sci. 2024, 15, 7374-7393.
2. Gupta, S.; Sarisozen, S.; Khuntia, S. K.; Lang, F.; Mahadevan, P.; Bhattacharyya, S. Adv. Funct. Mater. 2025, e14126.
3. Mandal, A.; Gupta, S.; Dutta, S.; Pati, S. K.; Bhattacharyya, S. Chem. Sci. 2023, 14, 9770-9779.
4. Mandal A.; Khuntia, S. K.; Mondal, D.; Mahadevan, P.; Bhattacharyya, S. J. Am. Chem. Soc. 2023, 145, 24990-25002.
5. Mondal, A.; Ubaid, Md.; Gupta, S.; Pal, K.; Bhattacharyya, S. Angew. Chem. Int. Ed. 2025, 64, e202412779.
6. Hazra, V.; Mondal, S.; Pattanayak, P.; Bhattacharyya, S. Small 2024, 20, 2304920.
7. Hazra, V.; Saha, S.; Pati, S. K.; Bhattacharyya, S. Adv. Mater. 2025, 37, 2414170.

Biography


Professor Sayan Bhattacharyya
Department of Chemical Sciences
Indian Institute of Science Education and Research (IISER) Kolkata

Prof. Sayan Bhattacharyya is working at the Department of Chemical Sciences, IISER Kolkata, India. He received his Ph.D. degree from the Indian Institute of Technology (IIT), Kanpur, India, in 2006. After two postdoctoral stints at Bar-Ilan University, Israel (2006–2008), and Drexel University, U.S. (2008–2010), he joined IISER Kolkata as an Assistant Professor in April, 2010. He is currently a full Professor and was also the founder Chair of the Centre for Advanced Functional Materials at IISER Kolkata. He is a Solid-State Chemist interested in nanoscience, catalysis for energy conversion and storage, and hybrid perovskite photovoltaics and optoelectronics. Prof. Bhattacharyya is the recipient of the SERB-STAR Award, CRS Silver Star Award and CRSI Bronze Medal. At present he is the Editorial Advisory Board Member of Journal of Materials Chemistry A, Small Methods and ACS Applied Energy Materials, as well as an Editorial Board Member of Scientific Reports and Indian Journal of Chemistry.

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