Phase evolution in AgSbS2 thin films synthesized via a two-stage process

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-03-19 DOI:10.1016/j.materresbull.2025.113430

Y.B. Kishore Kumar , Athipalli Divya , Radhalayam Dhanalakshmi , Mohamed Ouladsmane , Sambasivam Sangaraju , Venkateswarlu Gonuguntla , Vasudeva Reddy Minnam Reddy , U. Chalapathi

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Abstract

This study explores the influence of stacking order and sulfurization pressure on the phase evolution, structural properties, and optoelectronic performance of AgSbS₂ thin films. Sulfurizing Sb/Ag and Ag/Sb/Ag stacks at

350 °

C revealed distinct outcomes: the Sb/Ag stack produced compact, phase-pure cubic AgSbS₂ with a direct bandgap of 1.61 eV and high hole mobility (84 cm²V⁻¹s²), while the Ag/Sb/Ag stack contained Ag₃SbS₃ impurities and exhibited reduced electrical performance. Sulfurization pressures from 750 Torr to 7.5 Torr significantly impacted crystallinity, phase composition, and grain morphology. Higher pressures favored phase-pure cubic AgSbS₂ with enhanced compactness, while lower pressures promoted impurities and reduced film quality. The AgSbS₂ solar cells fabricated from the Sb/Ag stack achieved 0.95% efficiency (V_OC of 519.2 mV, J_SC of 6.11 mA/cm², FF of 30.0%), surpassing the efficiency of the Ag/Sb/Ag stack (0.7% efficiency, V_OC of 513.4 mV, J_SC of 4.45 mA/cm², FF of 32.6%) due to improved phase purity.

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两阶段法合成AgSbS2薄膜的相演化

本研究探讨了堆叠顺序和硫化压力对AgSbS2薄膜的相演化、结构性能和光电性能的影响。在350°C下对Sb/Ag和Ag/Sb/Ag堆叠进行硫化，结果截然不同：Sb/Ag堆叠产生致密、相纯的立方AgSbS2，直接带隙为1.61 eV，空穴迁移率高（84 cm2V−1s2），而Ag/Sb/Ag堆叠含有Ag3SbS3杂质，电性能下降。从750托尔到7.5托尔的硫化压力显著影响结晶度、相组成和晶粒形貌。较高的压力有利于相纯立方AgSbS2的致密性增强，而较低的压力会增加杂质并降低膜质量。由于相纯度的提高，由Sb/Ag堆叠制成的AgSbS2太阳能电池的效率达到0.95% (VOC为519.2 mV， JSC为6.11 mA/cm2， FF为30.0%)，超过了Ag/Sb/Ag堆叠的效率（0.7%，VOC为513.4 mV， JSC为4.45 mA/cm2， FF为32.6%）。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.