Synthetic and Post-Synthetic Strategies to Improve Photoluminescence Quantum Yields in Perovskite Quantum Dots
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Title
Synthetic and Post-Synthetic Strategies to Improve Photoluminescence Quantum Yields in Perovskite Quantum DotsAuthor (s)
Date
2021-08-10Publisher
MDPIBibliographic citation
Lee, C.; Lee, S.J.; Shin, Y.; Woo, Y.; Han, S.-H.; Gualdrón-Reyes, A.F.; Mora-Seró, I.; Yoon, S.J. Synthetic and Post-Synthetic Strategies to Improve Photoluminescence Quantum Yields in Perovskite Quantum Dots. Catalysts 2021, 11, 957. https:// doi.org/10.3390/catal11080957Type
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Abstract
Making high-quality raw materials is the key to open the versatile potential of next generation materials. All-inorganic CsPbX3 (X: Cl−, Br−, and/or I−) perovskite quantum dots (PQDs) have been applied in various ... [+]
Making high-quality raw materials is the key to open the versatile potential of next generation materials. All-inorganic CsPbX3 (X: Cl−, Br−, and/or I−) perovskite quantum dots (PQDs) have been applied in various optoelectronic devices, such as photocatalysis, hydrogen evolution, solar cells, and light-emitting diodes, due to their outstanding photophysical properties, such as high photoluminescence quantum yield (PLQY), absorption cross-section, efficient charge separation, and so on. Specifically, for further improvement of the PLQY of the PQDs, it is essential to diminish the non-radiative charge recombination processes. In this work, we approached two ways to control the non-radiative charge recombination processes through synthetic and post-synthetic processes. Firstly, we proposed how refinement of the conventional recrystallization process for PbI2 contributes to higher PLQY of the PQDs. Secondly, after halide exchange from CsPbI3 PQDs to CsPbBr3, through an in situ spectroelectrochemical setup, we monitored the positive correlation between bromide deposition of on the surface of the perovskite and photoluminescence improvement of the CsPbBr3 perovskite film through electrodeposition. These two strategies could provide a way to enhance the photophysical properties of the perovskites for application to various perovskite-based optoelectronic devices. [-]
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Catalysts 2021, 11(8), 957Funder Name
Korean government (MSIT). National Research Foundation of Korea (NRF) | Ministry of Science, ICT (Korea). National Research Foundation of Korea 32(NRF) | Ministry of Science and Innovation of Spain | Generalitat Valenciana
Project code
2019R1F1A1062395 | 2021R1F1A1063382 | 2019H1D8A1105630 | PID2019- 107314RB-I00 | Prometeo/2018/098
Project title or grant
X-mind Corps program | Project STABLE | Prometeo Grant Q-Devices
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- INAM_Articles [521]
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