The Interface Interaction of C3N4/Bi2S3 Promoted the Separation of Excitons and the Extraction of Free Photogenerated Carriers in the Broadband Light Spectrum Range

IF 3.4 4区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Inorganics Pub Date : 2025-04-12 DOI:10.3390/inorganics13040122

Xingfa Ma, Xintao Zhang, Mingjun Gao, Ruifen Hu, You Wang, Guang Li

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引用次数: 2

Abstract

Exciton generation and separation play an important role in the photoelectric properties and the luminescence performance of materials. In order to tailor the defects and grain boundaries and improve the exciton separation and light harvesting of the graphitic carbon nitride (g-C3N4) nanosheets, a C3N4/bismuth sulfide (Bi2S3) nanocomposite was synthesized. The photoelectric properties of the 405, 532, 650, 780, 808, 980 and 1064 nm light sources were studied using Au electrodes and graphite electrodes with 4B and 5B pencil drawings. The results indicate that the C3N4/Bi2S3 nanocomposite exhibited photocurrent switching behavior in the broadband light spectrum range. It is noted that even with zero bias applied, a good photoelectric signal was still measured. The resulting nanocomposite exhibited good photophysical stability. Physical mechanisms are discussed herein. It is suggested that the interfacial interaction of C3N4 and Bi2S3 in the nanocomposite creates a strong built-in electric field, which accelerates the separation of excitons. Therefore, as a dynamic process of photoexcitation, fluorescence, the photoelectric effect, and scattering are three main competing processes; the separation of excitons and the extraction of free photogenerated charge can be used as a reference for the fluorescent materials or other photoelectric materials studies as photophysical properties. This study also serves as an important reference for the design, defect and grain boundary modulation or interdisciplinary application of functional nanocomposites, especially for the bandgap modulation and suppression of photogenerated carrier recombination.

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C3N4/Bi2S3的界面相互作用促进了激子的分离和在宽带光谱范围内自由光生载流子的提取

激子的产生和分离对材料的光电性能和发光性能起着重要的作用。为了调整石墨氮化碳（g-C3N4）纳米片的缺陷和晶界，提高其激子分离和光收获性能，合成了C3N4/硫化铋（Bi2S3）纳米复合材料。采用金电极和石墨电极分别对405、532、650、780、808、980和1064 nm光源的光电性能进行了研究，并绘制了4B和5B铅笔图。结果表明，C3N4/Bi2S3纳米复合材料在宽带光谱范围内具有光电流开关特性。注意到，即使施加零偏压，仍然测量到良好的光电信号。所制备的纳米复合材料具有良好的光物理稳定性。本文讨论了物理机制。结果表明，C3N4和Bi2S3在纳米复合材料中的界面相互作用产生了强大的内嵌电场，加速了激子的分离。因此，作为光激发的动态过程，荧光、光电效应、散射是三个主要的竞争过程；激子的分离和自由光生电荷的提取可以作为荧光材料或其他光电材料的光物理性质研究的参考。该研究也为功能纳米复合材料的设计、缺陷和晶界调制或跨学科应用，特别是光生载流子复合的带隙调制和抑制提供了重要参考。

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

Inorganics Chemistry-Inorganic Chemistry

CiteScore

2.80

自引率

10.30%

发文量

193

审稿时长

6 weeks

期刊介绍： Inorganics is an open access journal that covers all aspects of inorganic chemistry research. Topics include but are not limited to: synthesis and characterization of inorganic compounds, complexes and materials structure and bonding in inorganic molecular and solid state compounds spectroscopic, magnetic, physical and chemical properties of inorganic compounds chemical reactivity, physical properties and applications of inorganic compounds and materials mechanisms of inorganic reactions organometallic compounds inorganic cluster chemistry heterogenous and homogeneous catalytic reactions promoted by inorganic compounds thermodynamics and kinetics of significant new and known inorganic compounds supramolecular systems and coordination polymers bio-inorganic chemistry and applications of inorganic compounds in biological systems and medicine environmental and sustainable energy applications of inorganic compounds and materials MD