Kraidy Assohoun Fulgence, Yapi Abé Simon, El Marssi Mimoun, Penton Madrigal Arbelio, Gagou Yaovi
Laboratoire de Physique de la Matière Condensée, University of Picardie Jules Verne, 33 Rue Saint Leu, CEDEX 01, 80039 Amiens, France.
UFR Science, Département Science, Structure de la Matière et Technologie, Université Félix Houphouët Boigny, Abidjan BP 258, Côte d'Ivoire.
Materials (Basel). 2024 May 27;17(11):2571. doi: 10.3390/ma17112571.
High-performance photovoltaic devices require active photoanodes with superior optoelectric properties. In this study, we synthesized neodymium ruthenate, NdRuO (NRO), and gadolinium ruthenate pyrochlore oxides, GdRuO (GRO), via the solid-state reaction technique, showcasing their potential as promising candidates for photoanode absorbers to enhance the efficiency of dye-sensitized solar cells. A structural analysis revealed predominantly cubic symmetry phases for both materials within the - space group, along with residual orthorhombic symmetry phases (NdRuO and GdRuO, respectively) refined in the space group. Raman spectroscopy further confirmed these phases, identifying distinct active modes of vibration in the predominant pyrochlore oxides. Additionally, a scanning electron microscopy (SEM) analysis coupled with energy-dispersive X-ray spectroscopy (EDX) elucidated the morphology and chemical composition of the compounds. The average grain size was determined to be approximately 0.5 µm for GRO and 1 µm for NRO. Electrical characterization via I-V measurements revealed that these pyrochlore oxides exhibit n-type semiconductor behavior, with conductivity estimated at 1.5 (Ohm·cm) for GRO and 4.5 (Ohm·cm) for NRO. Collectively, these findings position these metallic oxides as promising absorber materials for solar panels.
高性能光伏器件需要具有优异光电性能的活性光阳极。在本研究中，我们通过固态反应技术合成了钌酸钕（NdRuO，NRO）和钌酸钆烧绿石氧化物（GdRuO，GRO），展示了它们作为光阳极吸收剂的潜力，有望提高染料敏化太阳能电池的效率。结构分析表明，这两种材料在 - 空间群中主要为立方对称相，同时在 空间群中分别细化出残余的正交对称相（分别为NdRuO和GdRuO）。拉曼光谱进一步证实了这些相，确定了主要烧绿石氧化物中不同的活性振动模式。此外，扫描电子显微镜（SEM）分析与能量色散X射线光谱（EDX）相结合，阐明了化合物的形态和化学成分。测定GRO的平均晶粒尺寸约为0.5 µm，NRO的平均晶粒尺寸为1 µm。通过I-V测量进行的电学表征表明，这些烧绿石氧化物表现出n型半导体行为，GRO的电导率估计为1.5（欧姆·厘米），NRO的电导率为4.5（欧姆·厘米）。总的来说，这些发现将这些金属氧化物定位为太阳能电池板有前景的吸收材料。
