The ion beam-induced luminescence on perovskite films with surface passivation based on ligand modulation

IF 1.5 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2026-04-01 Epub Date: 2026-02-10 DOI:10.1016/j.nimb.2026.166040

Yuetong Ma , Junyan Li , Xiao Ouyang , Guojing Wang , Menglin Qiu , Shasha Lv

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Abstract

The monodisperse cubic-phase CsPbBr₃ thin films were synthesized based on stabilizer-assisted colloidal method, with oleic acid and octylamine as dual ligands. The effect of octylamine concentration on the microstructure and luminescence properties was systematically investigated. Characterization techniques were employed to analyze the film morphology, crystallinity, and optical characteristics. It is found that octylamine concentration critically governs perovskite crystal growth kinetics and defect passivation efficiency. Increasing octylamine concentration has progressively enlarged grain size, reduced the bandgap, and caused emission red-shifting, which is consistent with the shift in the UV–Vis absorption edge. The films with low octylamine concentration got well-dispersed particles but the reduced crystallinity, and the medium concentration produced a bimodal crystal size distribution and dual PL emission peaks at 515 nm and 539 nm. While, the high octylamine concentration induced surface cracks and defects, resulting in a drastic decrease in luminescence intensity. Ion beam-induced luminescence (IBIL) further confirmed the ligand modulation effect on luminescence, showing a red-shifted peak at 570 nm corresponding to the PL results. The octylamine ligands enable effective tuning of CsPbBr₃ film microstructure and optical properties by regulating crystal nucleation/growth and surface passivation. It provides a critical insights for optimizing perovskite luminescent materials through ligand engineering.

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基于配体调制的表面钝化钙钛矿薄膜的离子束致发光

以油酸和辛胺为双配体，采用稳定剂辅助胶体法制备了单分散的三相CsPbBr3薄膜。系统地研究了辛胺浓度对其微观结构和发光性能的影响。利用表征技术分析了薄膜的形貌、结晶度和光学特性。发现辛胺浓度对钙钛矿晶体生长动力学和缺陷钝化效率有重要影响。随着辛胺浓度的增加，晶粒尺寸逐渐增大，带隙减小，引起发射红移，这与紫外-可见吸收边的位移一致。低辛胺浓度的薄膜颗粒分散良好，但结晶度降低，中等浓度的薄膜在515 nm和539 nm处形成双峰型晶体尺寸分布和双发光峰。而高辛胺浓度会引起表面裂纹和缺陷，导致发光强度急剧下降。离子束诱导发光（IBIL）进一步证实了配体对发光的调制作用，在570 nm处显示出与PL结果相对应的红移峰。辛胺配体可以通过调节晶体成核/生长和表面钝化来有效调节CsPbBr3薄膜的微观结构和光学性能。这为通过配体工程优化钙钛矿发光材料提供了重要的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms 物理-核科学技术

CiteScore

2.80

自引率

7.70%

发文量

231

审稿时长

1.9 months

期刊介绍： Section B of Nuclear Instruments and Methods in Physics Research covers all aspects of the interaction of energetic beams with atoms, molecules and aggregate forms of matter. This includes ion beam analysis and ion beam modification of materials as well as basic data of importance for these studies. Topics of general interest include: atomic collisions in solids, particle channelling, all aspects of collision cascades, the modification of materials by energetic beams, ion implantation, irradiation - induced changes in materials, the physics and chemistry of beam interactions and the analysis of materials by all forms of energetic radiation. Modification by ion, laser and electron beams for the study of electronic materials, metals, ceramics, insulators, polymers and other important and new materials systems are included. Related studies, such as the application of ion beam analysis to biological, archaeological and geological samples as well as applications to solve problems in planetary science are also welcome. Energetic beams of interest include atomic and molecular ions, neutrons, positrons and muons, plasmas directed at surfaces, electron and photon beams, including laser treated surfaces and studies of solids by photon radiation from rotating anodes, synchrotrons, etc. In addition, the interaction between various forms of radiation and radiation-induced deposition processes are relevant.