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PVP浓度对喷墨打印CsPbBr3结晶形貌、发光与稳定性影响规律

张剑, 申慧, 杨迎, 张熏涛, 田甜, 徐家跃   

  1. 上海应用技术大学 材料科学与工程学院,上海 201418
  • 收稿日期:2025-11-20 修回日期:2025-12-27
  • 通讯作者: 申 慧, 教授. E-mail: hshen@sit.edu.cn; 徐家跃, 教授. Email: xujiayue@sit.edu.cn
  • 作者简介:张 剑(1999-), 男, 硕士研究生. E-mail: 17638416686@163.com
  • 基金资助:
    国家自然科学基金(52572010, U2130124, 51972213)

Influence of PVP Concentration on the Crystalline Morphology, Luminescence and Stability of Inkjet-printed CsPbBr3 Patterns

ZHANG Jian, SHEN Hui, YANG Ying, ZHANG Xuntao, TIAN Tian, XU Jiayue   

  1. School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418
  • Received:2025-11-20 Revised:2025-12-27
  • Contact: SHEN Hui, professor. E-mail: hshen@sit.edu.cn; XU Jiayue, professor. Email: xujiayue@sit.edu.cn
  • About author:ZHANG Jian (1999-), male, Master candidate. E-mail: 17638416686@163.com
  • Supported by:
    National Natural Science Foundation of China (52572010, U2130124, 51972213)

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摘要： 以CsPbBr3为代表的金属卤化物钙钛矿具有高光致发光量子效率、窄带发射及宽色域等优异特性,在光电探测、太阳能电池和光电显示等领域具有广阔应用前景。高质量图案化制备对于高分辨率、集成化光电器件至关重要。本研究旨在探究聚乙烯吡咯烷酮(Polyvinylpyrrolidone, PVP)浓度对喷墨打印CsPbBr3纳米阵列的结晶形貌、发光性能及环境稳定性影响规律。采用喷墨打印方法,在不同浓度(0, 50, 100, 150 mg/mL)PVP修饰的聚对苯二甲酸乙二醇酯(Polyethylene Terephthalate, PET)衬底上,制备了一系列CsPbBr3纳米阵列。结果表明,当PVP浓度为50 mg/mL时,CsPbBr3平均粒径为92 nm,发光强度最高,荧光寿命达到91.5 ns。主要是由于PVP分子中的羰基(Carbonyl, C=O)与钙钛矿中的Pb2+之间的配位作用,有效钝化表面缺陷,抑制非辐射复合。在30 ℃、65%~75%相对湿度条件下保存30 d,当PVP浓度为0, 50, 100, 150 mg/mL时,柔性CsPbBr3阵列的发光强度分别达到初始强度的18.96%, 73.44%, 66.57%和54.91%。PVP对CsPbBr3晶粒的空间限域与包覆作用,有效增强了环境稳定性。本工作为优化柔性CsPbBr3图案化制备、推动其在光电器件中的集成应用提供了理论依据与实验指导。

关键词: CsPbBr3, 聚乙烯吡咯烷酮, 喷墨打印, 聚对苯二甲酸乙二醇酯

Abstract: Metal halide perovskites, represented by CsPbBr3, possess outstanding properties such as high photoluminescence quantum yield, narrow emission linewidth and wide color gamut, making them promising applications in the areas of photodetection, solar cells and display, etc. High-quality patterning is crucial for high-resolution and integrated optoelectronic devices. In order to explore the influence of polyvinylpyrrolidone (PVP) concentration on the morphological, optical, and environmental stabilities of inkjet-printed CsPbBr3 nano-arrays. A series of CsPbBr3 patterns were inkjet printed on the flexible Polyethylene Terephthalate (PET) substrates which was modified by PVP layer with varied concentrations (0, 50, 100, 150 mg/mL). When the PVP concentration was controlled at 50 mg/mL, the printed CsPbBr3 patterns exhibited uniform crystalline morphology with the smallest average grain size of 92 nm, achieving the highest photoluminescence intensity and prolonged fluorescence lifetime of 91.5 ns. It is attributed to effective defect passivation effect via coordination interactions between carbonyl groups (C=O) of PVP chains and Pb2+ ions of perovskite, suppressing the non-radiative recombination pathways. Stability evaluations were conducted under conditions of 30 ℃, 65%-75% relative humidity for 30 d, with PVP concentrations of 0, 50, 100, and 150 mg/mL, the flexible luminescent patterns retained 18.96%, 73.44%, 66.57%, and 54.91% of their initial emission intensity, respectively. The significant enhancement in the environmental stabilities was mainly originated from the space confinement and encapsulation effect of PVP matrix on the CsPbBr3 particles. This work provides deeper insight into the optimization of flexible perovskite patterning, thereby advancing prospects for potential application in high-performance and integrated optoelectronic devices.

Key words: CsPbBr3, polyvinylpyrrolidone, inkjet printing, polyethylene terephthalate

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