Impact of Non-radiative Energy Transfer in Inorganic Perovskite on the Charge Transport with CdSe/ZnS Quantum Dots
Leepsa Mishra a, Ranjan Kumar Behera a, Aradhana Panigrahi a, Manas Kumar Sarangi a
a Indian Institute of Technology Patna, India, Patna, India
International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV22)
València, Spain, 2022 May 19th - 25th
Organizers: Pablo Docampo, Eva Unger and Elizabeth Gibson
, Leepsa Mishra, presentation 291
Publication date: 20th April 2022

Lead halide perovskite nanocrystals (PNCs) have garnered much attention from the scientific community due to their fluorescence quantum yield, tunable size, bandgap, versatile morphology,  thermal and photo-stability, etc. With the addition of QDs into the donor CsPbBr3 and CsPbCl3 PNCs as-synthesized by ligand-assisted precipitation method, there is a sequential drop in the fluorescence intensity as well as an average lifetime with a simultaneous increase in these values for QDs, which ensures the presence of FRET in such systems. The FRET efficiency is found to be higher in case of CsPbBr3 PNCs (85 %) as compared to CsPbCl3 (5 %). The two-probe measurements suggest a remarkable current enhancement for the blend structure of PNCs with QDs, compared to the pristine PNCs. We observe FRET-induced conduction mechanism along with negative differential resistance and negligible hysteresis for CsPbBr3 PNCs, which can pave a new path in studying the high performance-based photovoltaics and optoelectronics.

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