Proceedings of MATSUS Fall 2024 Conference (MATSUSFall24)
DOI: https://doi.org/10.29363/nanoge.matsusfall.2024.289
Publication date: 28th August 2024
Metal halide perovskites have exhibited great potential in next-generation display applications owing to their high colour purity and high photoluminescence quantum yields. They are known to be highly defect-tolerant compared with conventional semiconductors. However, multiple evidence shows that the effect of defects has significant impacts on the performance of light-emitting diodes. Additionally, we can not ignore the impact of carrier injection on the perovskite light-emitting diode performance. Based on the fundamental principles of perovskite passivation, we introduced multifunctional phosphine-containing molecules, including diphenylphosphinamide and phosphonic acid, as the additive to passivate surface defects, modulate the phase distribution, and smooth the energy transfer of the quasi-2D perovskite, giving rise to higher optoelectronic properties of perovskites and better performance. Meanwhile, we designed the tris(4-trifluoromethylphenyl)phosphine oxide to modulate the energy level and hole mobility of originally commercial poly(9-vinylcarbazole) layer, resulting efficient blue perovskite light-emitting diodes. demonstrate that phosphine-containing molecules not only serve as passivation agents for perovskites but also modify the properties of the charge transport layer. We believe that phosphine-containing molecules hold significant potential for enhancing the performance of perovskite LEDs.
This work was supported by the National Research Foundation of Korea (NRF-2022H1D3A3A01077343, NRF-2022R1A2C4002248, and 2021M3H4A1A02049006). This research was supported by the core research institute (CRI) program, the basic science research program through the national research foundation of Korea (NRF) under program number (2022R1A6A1A03051158). The authors acknowledge the EPSRC (EP/V06164X/1) for funding. This work was supported by the Samsung Research Funding & Incubation Center of Samsung Electronics under Project Number SRFC-TC2103-04. AD would like to express his gratitude to the Penrose scholarship for very generously funding his studentship.
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