Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV24)
Publication date: 6th February 2024
2D hybrid organic-inorganic lead halide perovskites often decompose upon heating without forming a stable molten state of the material. But if the melting temperature can be reduced significantly compared to the decomposition temperature, then a stable melt of 2D hybrid perovskites can be formed. Thus, The melt can be recrystallized back to perovskite structure by simply cooling, paving the way to form their films without using any solvent. Here we design 2D hybrid organic-inorganic lead halide perovskites that melts at a moderate temperature ~ 100 oC, significantly smaller than their decomposition temperature > 210 oC. The reduction in the melting temperature is done by tailoring the hydrogen bonding interaction between the organic and inorganic sublattice of 2D hybrid perovskites. The connection of hydrogen bonding interaction with melting temperature for specific 2D hybrid perovskites will be discussed in detail in the presentation. The reversible melting and recrystallization processes have been tested for over 50 cycles in ambient conditions. A series of similar 2D perovskites with low melting temperatures have been prepared. After developing the chemistry, we make melt-processed films of 2D hybrid perovskites and their photodetector devices, with a reasonably fast response time of 50 ms. Interestingly, the melt-processed 2D perovskite film can be transformed to 3D methylammonium lead iodide (MAPbI3) films by employing a simple cation-exchange process. Expectedly, the photodetector performance improves significantly for 3D MAPbI3.
DST-FIST
UGC (Funding Agency for PhD)
SERB India
Dr. Angshuman Nag (Supervisor)
All Faculty Members, All Non-Teaching Staff (IISER Pune)
Lab mates, Friends, and Family
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International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
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