Publication date: 2nd November 2020
Both lead and lead-free halide perovskites have emerged as revolutionary optoelectronic materials for a wide variety of applications1,2. While lead-based systems have made tremendous progress in photovoltaics, the lead-free counterparts are promising game-changers in photocatalytic energy generation reactions. With a focus on nanostructures, the first part of the lecture will discuss the nanocrystal-assisted passivation of pin-holes in CH3NH3PbI3 photoactive layer of solar cells to achieve photoconversion efficiency up to 20% along with long term ambient stability3-5. The second part will focus on CsPbX3 (X = Br/I) nanosheets, their increased charge separation and facile carrier mobility that enable excellent performances in photodetectors and field-effect transistors. The lecture will conclude with a discussion on the application of Cs3Bi2I9 nanocrystals in photocatalytic reactions.
References
(1) Chaudhary, D. K., Ghosh, A., Ali, Y. M., Bhattacharyya, S. Charge Transport between Coaxial Polymer Nanorods and Grafted All Inorganic Perovskite Nanocrystals for Hybrid Organic Solar Cells with Enhanced Photoconversion Efficiency. J. Phys. Chem. C 2020, 124, 246-255.
(2) Roy, S.; Mandal, A.; Raj R., A.; Bhattacharyya, S.; Pal, B. Thermal Nonlinear Refraction in Cesium Lead Halide Perovskite Nanostructure Colloids. J. Phys. Chem. C 2020, 124, 28, 15558–15564.
(3) Ghosh, D.; Chaudhary, D.; Ali, M.; Chauhan, K.; Prodhan, S.; Bhattacharya, S.; Ghosh, B.; Datta, P.; Ray, S.; Bhattacharyya, S. All-Inorganic Quantum Dot Assisted Enhanced Charge Extraction across the Interfaces of Bulk Organo-Halide Perovskites for Efficient and Stable Pin-Hole Free Perovskite Solar Cells. Chem. Sci. 2019, 10, 9530-9541.
(4) Ghosh, A.; Chaudhary, D. K.; Mandal, A.; Prodhan, S.; Chauhan, K. K.; Vihari, S.; Gupta, G.; Datta, P. K.; Bhattacharyya, S. Core/shell Nanocrystal Tailored Carrier Dynamics in Hysteresis-less Perovskite Solar Cell with ~20% Efficiency and Long Operational Stability. J. Phys. Chem. Lett. 2020, 11, 591-600.
(5) Ghosh, D.; Ali, M.; Chaudhary, D.; Bhattacharyya, S. Dependence of Halide Composition on The Stability of Highly Efficient All-Inorganic Cesium Lead Halide Perovskite Quantum Dot Solar Cells. Sol. Energy Mater. Sol. Cells 2018, 185, 28-35.
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