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Oxygen incorporation into CdS/CdTe thin film solar cells

机译:氧气掺入CdS / CdTe薄膜太阳能电池

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CdS/CdTe thin films with 2.1 μm thickness were grown using R.F. magnetron sputtering in two different mixtures of Ax and O_2. The substrate was a commercially available Pilkington glass with TCO deposited. The concentration of O_2 was selected to be 0, 1 and 5 %. The crystallographic, morphological, optical and electrical properties of the as-deposited samples were compared with the ones treated with CdCl_2 and subsequently annealed at high temperature. The films morphology and crystallinity were studied by X-ray diffraction and scanning electron microscopy. X-ray diffraction shows a transition of zinc blend cubic phase to hexagonal as the oxygen content increases from 0 to 5 %. The measurements show the larger band gap and grain sizes for the films with higher oxygen content. The band gap and transmission rate of the O_2-free and oxygenated devices is different and the grains size is greatly affected by the oxygen content.
机译:使用R.F生长厚度为2.1μm的CdS / CdTe薄膜。在两种不同的Ax和O_2混合物中进行磁控溅射。衬底是可商购的具有TCO沉积的Pilkington玻璃。 O_2的浓度选择为0%,1%和5%。将所沉积样品的晶体学,形态,光学和电学性质与经CdCl_2处理并随后在高温下退火的样品进行比较。通过X射线衍射和扫描电子显微镜研究膜的形态和结晶度。 X射线衍射显示,随着氧含量从0%增至5%,锌混合立方相向六方相的转变。测量结果表明,含氧量较高的薄膜具有较大的带隙和晶粒尺寸。不含O_2和含氧器件的带隙和传输速率不同,并且氧的含量极大地影响了晶粒尺寸。

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