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首页> 外文期刊>Optical Materials >Structural, optical and photovoltaic properties of P3HT and Mn-doped CdS quantum dots based bulk hetrojunction hybrid layers
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Structural, optical and photovoltaic properties of P3HT and Mn-doped CdS quantum dots based bulk hetrojunction hybrid layers

机译：P3HT和Mn掺杂的CdS量子点基体异质结混合层的结构，光学和光伏特性

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Cadmium sulphide (CdS) and Mn-doped CdS nanocrystals were synthesized by co-precipitation method. The nanocrystals were characterized by Fluorescence, Fourier Transformed Infra-red Spectrometer (FTIR), UV Visible, X-ray diffraction (XRD), X-ray photoelectron spectrometer (XPS), Field Emission Scanning Electron Microscope (FESEM), and High Resolution Transmission Electron Microscope (HRTEM). A considerable blue shift of absorption band with respect to the cadmium sulphide was observed by the Mn concentration (0.5 M) in the doped sample with decreasing the size of nanocrystals. Other reason for this may be Mn doping. Subsequently the band gap was altered from 2.11 to 2.21 eV due to quantum confinement effect. Scanning electron microscope supplemented with EDAX was operated to find grain size and chemical composition of the synthesized nanomaterials. The PL spectrum of Mn-doped CdS nanocrystals displays three PL bands the first one, within the range of 500 nm and the second band at 537 nm, and the third one around 713 nm is labelled red band emission due to attributed to a T-4(1) -> (6)A(1) transition within the 3d shell of divalent manganese. XRD analysis showed that the material was in cubic crystalline state. A comparative study of surfaces of un-doped and metal doped CdS nanocrystals were investigated using X-ray Photoelectron Spectroscopy (XPS). The synthesized nano material in combination with polymer, poly (3-hexyl thiophene) was operated in the construction of photovoltaic cells. The photovoltaic devices with CdS nanocrystals exhibited power conversion efficiency of 0.34% without annealing and 0.38% with annealing. However, the power conversion efficiency was enhanced by a factor of 0.35 without annealing and 0.42 with annealing with corporation of Mn impurity in CdS lattice. Atomic Force Microscopy was employed for morphology and packing behavior of blend of nanocrystals with organic polymer. (C) 2018 Elsevier B.V. All rights reserved.
机译：采用共沉淀法合成了硫化镉（CdS）和锰掺杂的CdS纳米晶体。纳米晶体的特征在于荧光，傅立叶变换红外光谱仪（FTIR），紫外可见光，X射线衍射（XRD），X射线光电子能谱仪（XPS），场发射扫描电子显微镜（FESEM）和高分辨率透射电子显微镜（HRTEM）。通过掺杂样品中的锰浓度（0.5 M）观察到吸收带相对于硫化镉的显着蓝移，同时减小了纳米晶体的尺寸。其他原因可能是Mn掺杂。随后，由于量子限制效应，带隙从2.11eV改变为2.21eV。用扫描电子显微镜补充EDAX，以发现合成的纳米材料的粒度和化学组成。 Mn掺杂的CdS纳米晶体的PL光谱在500 nm范围内显示三个PL波段，第一个波段在537 nm范围内，第二个波段在537 nm处，第一个波段在713 nm附近被标记为红色波段发射，这归因于T-在二价锰的3d壳内发生4（1）->（6）A（1）过渡。 XRD分析表明该材料为立方晶态。使用X射线光电子能谱（XPS）研究了未掺杂和金属掺杂的CdS纳米晶体表面的比较研究。将合成的纳米材料与聚合物（聚（3-己基噻吩））结合用于光伏电池的构造。具有CdS纳米晶体的光伏器件在没有退火的情况下表现出0.34％的功率转换效率，在退火的情况下表现出0.38％的功率转换效率。然而，通过在CdS晶格中掺入Mn杂质，不进行退火，功率转换效率提高了0.35倍，而进行了退火，功率转换效率提高了0.42倍。原子力显微镜用于纳米晶体与有机聚合物共混物的形态和堆积行为。 （C）2018 Elsevier B.V.保留所有权利。

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