Low-temperature UV ozone-treated high efficiency radial p-n junction solar cells: N-Si NW arrays embedded in a p-Si matrix
Low-temperature UV ozone-treated high efficiency radial p-n junction solar cells: N-Si NW arrays embedded in a p-Si matrix
复制标题
DOI：
10.1016/j.nanoen.2014.10.028
复制
发表时间：
2015
期刊：
影响因子：
17.6
通讯作者：
M. Dutta;N. Fukata
中科院分区：
文献类型：
--
作者：
M. Dutta;N. Fukata
利用紫外臭氧处理嵌入在p-Si矩阵结构中的n-Si NW阵列，实现了高效率的径向p-n结SiNW太阳能电池。这种结构提供了均匀且连续的前电极图案化的优点，这导致比核-壳形态更低的串联电阻。表面和本体复合是主要负责降低电池性能与增加硅纳米线的长度，尽管增强的结面积和改善的光捕获能力。在这项研究中，我们估计的临界NW长度，以获得最佳的电池性能与最小的载流子损耗在一个简单的径向p-n结太阳能电池。进一步的低温UV臭氧处理提供了通过氧化钝化大量表面缺陷态来增强太阳能电池性能的潜力。
High-efficiency radial p-n junction SiNW solar cells have been realized using UV ozone treatment of n-Si NW arrays embedded in a p-Si matrix structure. This structure provides the advantage of homogeneous and continuous front electrode patterning, which results in a lower series resistance than for core-shell morphology. Surface and bulk recombination is chiefly responsible for degrading cell performance with increased SiNW length in spite of enhanced junction area and improved light-trapping capability. In this study we estimated the critical NW length necessary to obtain optimal cell performance with minimum carrier loss in a simple radial p-n junction solar cell. Further low-temperature UV ozone treatments offer the potential to enhance solar cell properties by passivating, by oxidation, the large number of surface defect states.