Research on Crystallization Kinetics Regulation of Blue Quasi-2D Perovskites and Their Application in Electroluminescent Devices

doi:10.16553/j.cnki.issn1000-985x.2025.0075

Abstract

Abstract: Blue perovskite electroluminescent devices offer outstanding color purity and cost-effective fabrication， making them highly promising for applications in full-color displays and white light illumination. Quasi-two-dimensional （quasi-2D） perovskites， owing to their outstanding optical properties and structural tunability， have showed broad application prospects. However， the regulation of their crystallization kinetics is critical for optimizing film quality and luminescent performance. This review summarizes the optical and photophysical characteristics of blue quasi-2D perovskites， with a particular focus on strategies for controlling their crystallization behavior through component management， additive engineering， post-treatment technology， and interfacial modification. Studies demonstrate that precise control crystallization kinetics of quasi-2D perovskites can significantly enhance uniformity and photoluminescence quantum yield of the films， while also improving the external quantum efficiency and operational stability of the devices. Finally， the paper analyzes the current challenges and limitations in this field， and provides a perspective on future development directions toward high-efficiency， high-brightness， and long-lifetime blue perovskite electroluminescent devices， offering theoretical insights and technical guidance for future research.

Key words: quasi-2D perovskite; blue electroluminescent device; component management; additive engineering; post-treatment technology; interfacial modification; optoelectronic property

CLC Number:

TB34

YU Mubing, GAO Gang, ZHAO Yongbiao, ZHU Jiaqi. Research on Crystallization Kinetics Regulation of Blue Quasi-2D Perovskites and Their Application in Electroluminescent Devices[J]. Journal of Synthetic Crystals, 2025, 54(7): 1132-1145.

Figures/Tables 8

Fig.1 （a） Schematic diagram of blue quasi-2D perovskite crystal structure，（b） schematic diagram of energy transfer pathways in quasi-2D perovskite quantum well［23］，（c） energy band structure schematic diagram of common carrier transport layer and light-emitting layer［30］

Fig.2 （a） Schematic diagram representing the strategy adopted to form intermediate n phases for blue emission［32］， TA spectra of pristine （b） and GA10 perovskite film （c）［33］，（d） UV-Vis absorption and steady-state PL spectra of PEA2（Rb x Cs1-x ）2Pb3Br10［34］，（e） electronic density of states （DOS） of CsPbBr3， Cs0.75EA0.25PbBr3， and Cs0.5EA0.5PbBr3［35］

Fig.3 （a） PL spectra of perovskite PEA2Cs1.5Pb2.5Br8.5 with 0%~60% IPABr additive［36］，（b） TA spectra of PEA2Cs1.5Pb2.5Br8.5 with 0% and 40% IPABr［36］，（c） the integrated intensity-q relations of GIWAXS patterns for the CsPbClBr2 nanocrystal films with different ratios between DPPABr and PEABr［37］，（d） schematic diagram of low-dimensional components engineering of P-PDABr2［38］， UV-Vis spectra （e） and PL spectra （f） of different ligand treated quasi-2D perovskite film［39］

Fig.4 GIWAXS images of control （a） and 8%-PPNCl （b） blue quasi-2D perovskite film［40］，（c） schematic diagram of defect passivation and low-dimensional phase regulation of DFBP in the pristine and target perovskites［41］，（d） PDOS curves of the pristine perovskite， perovskite containing a chloride vacancy and renovated by C＝O group［42］，（e） PDOS curves of the pristine perovskite， perovskite containing a lead-chloride defect and renovated by hydroxy group［42］，（f） schematic and DFT calculated destabilization energy of PbBr2 coordinated with GABA and PEA binding to the surface［43］

Fig.5 （a） UV-Vis absorption and PL spectra of quasi-2D perovskite films without and with 20% NaBr［44］， TA spectra UV-Vis of quasi-2D perovskite films without （b） and with 20% NaBr （c）［44］，（d） schematic illustrated the rearrangement of phase distribution by adding Na+ in quasi-2D perovskites［44］， UV-Vis absorption spectra （e） and TRPL curves （f） of quasi-2D perovskite films spin-coated on pristine and alkali-treated PEDOT∶PSS films［45］，（g） PLQY of LiX incorporated blue， green， and red perovskite films［46］

Fig.6 In-situ GIWAXS images for the control （a） and DMSO steam-treated （b） quasi-2D phases of perovskite film［47］，（c） schematic illustration of the suppressed energy transfer losses for the rearranged phase distribution［47］，（d） schematic diagrams of the vertical domain distribution in the control and target film［48］， the absorption and normalized PL spectra of the control （e） and thermal gradient treated （f） quasi-2D perovskite film［48］

Fig.7 （a） Schematic diagram of rearrangement of the phase distribution of quasi-2D perovskites after CsCl diffusion［50］， TA kinetics probed at selected wavelengths in quasi-2D perovskites without （b） and with （c） CsCl incorporation［50］， GIWAXS diffraction patterns of perovskite films on pristine （d） and TEOS-modified （e） PVK layers at different annealing times［51］

Fig.8 GIWAXS images of perovskite films grown on the control （a） and PS-modified （b） PEDOT∶PSS layers［52］，（c） steady-state PL spectra and （d） PLQYs of control and PS-modified perovskite films［52］，（e） schematic illustration of the formation of n-phase due to different absorption energy between the PBA+/Cs+ and ［PbBr6］4-［53］，（f） DFT calculation results of the absorption energy between the PBA+/Cs+ and ［PbBr6］4-［53］， GIWAXS images of pristine perovskite （g） and GASCN modified （h） perovskite film［53］， UV-Vis absorption and TA spectra with different time scales of pristine （i） and modified （j） perovskite films［54］

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