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微量掺碳nc-SiC:H薄膜用于p-i-n太阳电池的窗口层
Deposition of p-type nc-SiC:H thin films with subtle carbon incorporation for applications in p-i-n solar cells
【摘要】 采用等离子增强化学气相沉积方法(PECVD)制备了微量掺碳的p型纳米非晶硅碳薄膜(p-nc-SiC:H),反应气体为硅烷和甲烷,掺杂气体采用硼烷,沉积温度分别采用333K,353K和373K.测量结果表明随着沉积温度增加和碳含量的增加,薄膜的光学带隙增加;薄膜具有较宽的带隙和较高的电导率,同时有较低的激活能(0.06eV).Raman和XRD测量结果表明薄膜存在纳米晶.优化的p型纳米非晶硅碳薄膜作为非晶硅p-i-n太阳电池的窗口层,使得太阳电池的开路电压达到0.94V.
【Abstract】 This paper presents a detailed study on the effects of carbon incorporation and substrate temperature on structural, optical, and electrical properties of p-type nanocrystalline amorphous silicon films. A p-nc-SiC:H thin film with optical gap of 1.92eV and activation energy of 0.06eV is obtained through optimizing the plasma parameters. By using this p-type window layer, single junction diphasic nc-SiC:H /a-Si:H solar cells have been successfully prepared with a V_ oc of 0.94eV.
【Key words】 Infrared absorption spectra; optical band gap; nanocrystalline silicon films; solar cells;
- 【文献出处】 物理学报 ,Acta Physica Sinica , 编辑部邮箱 ,2007年05期
- 【分类号】O484.4
- 【被引频次】9
- 【下载频次】391