Tailoring Cu2−xTe quantum-dot-decorated ZnO nanoparticles for potential solar cell applications

IF 3.1 4区物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Current Applied Physics Pub Date : 2014-05-01 Epub Date: 2014-03-24 DOI:10.1016/j.cap.2014.03.014

Auttasit Tubtimtae , Surachet Phadungdhitidhada , Duangmanee Wongratanaphisan , Atcharawon Gardchareon , Supab Choopun

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引用次数: 11

Abstract

Cu_2−xTe QDs on ZnO nanoparticles were synthesized using a successive ionic layer absorption and reaction technique (SILAR) at room temperature. The as-synthesized QDs which were distributively deposited on ZnO nanoparticles surface were characterized by field emission scanning electron microscope (FE-SEM), X-ray diffraction and high-resolution transmittance microscope (HR-TEM). It revealed that the average diameter of the QDs was ∼2 nm. The synthesized Cu_2−xTe QDs were solely orthorhombic Cu_1.44Te phase. The growth mechanism was supposed that it based on ions deposition. The energy gap of as-synthesized Cu_2−xTe QDs was determined ∼1.1 eV and the smallest energy gap of 0.76 eV was obtained, equal to that of bulk material. Raman spectroscopy and FTIR were also used to study the Cu_2−xTe QDs on ZnO nanoparticles. These characteristics suggest a promising implication for a potential broadband sensitizer of QDSCs.

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定制Cu2−xTe量子点装饰ZnO纳米粒子用于潜在的太阳能电池应用

采用连续离子层吸收反应技术(SILAR)在室温下合成了ZnO纳米粒子上的Cu2−xTe量子点。利用场发射扫描电镜(FE-SEM)、x射线衍射和高分辨率透射电镜(HR-TEM)对分布在ZnO纳米颗粒表面的量子点进行了表征。结果表明，量子点的平均直径为~ 2 nm。合成的Cu2−xTe量子点仅为正交Cu1.44Te相。推测其生长机理是基于离子沉积。合成Cu2−xTe量子点的能隙为~ 1.1 eV，最小能隙为0.76 eV，与块体材料的能隙相当。利用拉曼光谱和红外光谱研究了ZnO纳米粒子上的Cu2−xTe量子点。这些特性表明了一种潜在的qdsc宽带敏化剂的前景。

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来源期刊

Current Applied Physics 物理-材料科学：综合

CiteScore

4.80

自引率

0.00%

发文量

213

审稿时长

33 days

期刊介绍： Current Applied Physics (Curr. Appl. Phys.) is a monthly published international journal covering all the fields of applied science investigating the physics of the advanced materials for future applications. Other areas covered: Experimental and theoretical aspects of advanced materials and devices dealing with synthesis or structural chemistry, physical and electronic properties, photonics, engineering applications, and uniquely pertinent measurement or analytical techniques. Current Applied Physics, published since 2001, covers physics, chemistry and materials science, including bio-materials, with their engineering aspects. It is a truly interdisciplinary journal opening a forum for scientists of all related fields, a unique point of the journal discriminating it from other worldwide and/or Pacific Rim applied physics journals. Regular research papers, letters and review articles with contents meeting the scope of the journal will be considered for publication after peer review. The Journal is owned by the Korean Physical Society.