Polymer-assisted preparation of nanoscale films of thermoelectric PbSe and PbTe and of lead chalcogenide-polymer composite films
作者:Christoph Erk、Andreas Berger、Joachim H. Wendorff、Sabine Schlecht
DOI:10.1039/c0dt00745e
日期:——
Polymer films of polyethyleneoxide (PEO) or poly(L-lactide) (PLLA) containing a single-source precursor for either PbSe or PbTe were used to produce films of nanoparticles of these thermoelectric materials. The monomeric homoleptic chalcogenolates lead(II) bis-(2,4,6-trifluoromethylphenylselenolate) Pb[SeC6H2(CF3)3]2 and lead(II) bis-[tris(trimethylsilyl)silyl-tellurolate] Pb[TeSi(SiMe3)3]2 were used as single-source precursors for the thermolytic formation of the lead chalcogenides. The thickness and the quality of as-obtained thin films depended decisively on the spin-coating conditions, on the polymer, on the precursor concentration in the composite film before thermolysis and on the annealing time. Thin layers of particles of 30–50 nm size and high crystallinity were obtained. They were characterized by X-ray diffraction, thermal analysis and electron microscopy.
含有 PbSe 或 PbTe 单一来源前体的聚环氧乙烷 (PEO) 或聚 (L-丙交酯) (PLLA) 聚合物薄膜被用来生产这些热电材料的纳米颗粒薄膜。单体均配硫属醇盐双-(2,4,6-三氟甲基苯基硒酸)Pb[SeC6H2(CF3)3]2铅(II)和双-[三(三甲基甲硅烷基)甲硅烷基碲酸]Pb[TeSi(SiMe3)铅(II) 3]2 被用作铅硫族化物热解形成的单一来源前体。所获得的薄膜的厚度和质量主要取决于旋涂条件、聚合物、热分解前复合膜中的前体浓度以及退火时间。获得了 30-50 nm 尺寸和高结晶度的薄层颗粒。通过 X 射线衍射、热分析和电子显微镜对其进行了表征。