Stabilizing red-emitting all-inorganic perovskite nanocrystals by a ligand-mediated room-temperature procedure. Issue 38 (15th September 2022)

• Record Type: Journal Article
• Authors: Li, Ling; Dong, Hao; Hu, Yongfei; Zeng, Tao; Chen, Yunxia; Mensah-Darkwa, Kwadwo; Acheampong, Emmanuel Tsiwah; Ali, Ghafar; Xie, Yi
• Is Part Of: CrystEngComm. Volume 24:Issue 38(2022)
• Page Start: 6777
• Page End: 6785
• Publication Date: 2022-09-15
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/d2ce00910b
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : Scalable room-temperature ligand-assisted reprecipitation (LARP) approach in the presence of MPA to synthesize red-emitting perovskite nanocrystals with tuneable optical properties and enhanced environmental stability. Abstract : Although lead halide perovskite (LHP) nanocrystals (NCs) are considered propitious materials due to their extraordinary optoelectronic properties, the scalability of synthesis and poor ambient stability hinder their commercial applications. Herein, we develop a facile and universal room-temperature (RT) protocol for the synthesis of red-emitting all-inorganic CsPbBr3− x I x perovskite NCs by the mediation of capping ligands. The emission wavelength can be tuned in the range of 598–651 nm by tailoring the PbBr2 : PbI2 precursor ratios and the amounts of ligands. Interestingly, the introduction of ligands such as 3-mercaptopropionic acid (MPA) and thioglycolic acid (TGA) heavily improves the stability of the as-synthesized NCs against water, heat stress and UV irradiation, which is due to surface passivation. This work offers a reliable and scalable reference for tuning red-emissive perovskite NCs with improved environmental stability, which will accelerate their commercial application process in optoelectronic fields.