Crystalline lead sulfide (PbS) nanowires doped with terbium (Tb³⁺) ions were synthesized by the chemical bath deposition method at room temperature. The powder was obtained from an aqueous solutions using lead acetate dehydrate, terbium nitrate, thiourea, potassium hydroxide and ammonia. The terbium molar concentrations were varied in the deposition process to investigate the effect on the structural, optical, morphological and luminescent properties of PbS nanowires. The crystalline size was found to be dependent on the concentration of the Tb³⁺ ions used. The estimated average crystalline sizes were calculated from the X-ray diffraction and found to be 34, 33 and 37 nm for PbS: 0% Tb³⁺, PbS: 0.2% Tb³⁺ and PbS: 0.5% Tb³⁺, respectively. The scanning electron microscopy micrographs depict nanowire shape for the undoped as well as Tb-doped samples. The energy-dispersive X-ray and Auger electron spectroscopy analyses confirmed the presence of all the expected elements. The solid powder nanowires exhibited high absorptions in the UV–Vis regions. The band gap energies were estimated in the range of 1.99–2.46 eV. The absorption edge and the band gap energies of these PbS nanowires have shifted depending on the concentration of the dopant. The maximum luminescence intensity was obtained for PbS: 0.2% Tb³⁺ ions and luminescent quenching was observed for higher terbium concentrations.

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中文翻译：

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化学浴沉积法合成掺有Tb 3+离子的PbS纳米线及其表征

在室温下通过化学浴沉积法合成了掺有（（Tb ³⁺）离子的结晶硫化铅（PbS）纳米线。该粉末是从水溶液中使用乙酸铅脱水，硝酸,、硫脲，氢氧化钾和氨水获得的。the的摩尔浓度在沉积过程中发生变化，以研究其对PbS纳米线的结构，光学，形态和发光特性的影响。发现晶体尺寸取决于所使用的Tb ³⁺离子的浓度。通过X射线衍射计算得出的估计平均晶体尺寸，发现PbS：0％Tb ^{3 +}，PbS：0.2％Tb ³⁺和PbS：0.5％Tb分别为34、33和37 nm³⁺。扫描电子显微镜显微照片描绘了未掺杂以及Tb掺杂样品的纳米线形状。能量色散X射线和俄歇电子能谱分析证实了所有预期元素的存在。固体粉末纳米线在UV-Vis区域表现出高吸收。带隙能量估计在1.99–2.46 eV的范围内。这些PbS纳米线的吸收边缘和带隙能量已经根据掺杂剂的浓度发生了变化。PbS的最大发光强度为：0.2％Tb ³⁺离子，higher浓度较高时观察到发光猝灭。

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