Department of Energy Engineering, UNIST , Ulsan 44919, Republic of Korea.
KIER-UNIST, Advanced Center for Energy, Korea Institute for Energy Research , Ulsan 44919, Republic of Korea.
ACS Appl Mater Interfaces. 2016 May 11;8(18):11412-7. doi: 10.1021/acsami.6b00981. Epub 2016 Apr 28.
We optimize the thickness of a transparent conducting oxide (TCO) layer, and apply a microscale mesh-pattern metal electrode for high-efficiency a-Si/c-Si heterojunction solar cells. A solar cell equipped with the proposed microgrid metal electrode demonstrates a high short-circuit current density (JSC) of 40.1 mA/cm(2), and achieves a high efficiency of 18.4% with an open-circuit voltage (VOC) of 618 mV and a fill factor (FF) of 74.1% as result of the shortened carrier path length and the decreased electrode area of the microgrid metal electrode. Furthermore, by optimizing the process sequence for electrode formation, we are able to effectively restore the reduction in VOC that occurs during the microgrid metal electrode formation process. This work is expected to become a fundamental study that can effectively improve current loss in a-Si/c-Si heterojunction solar cells through the optimization of transparent and metal electrodes.
我们优化了透明导电氧化物（TCO）层的厚度，并应用微尺度网格图案金属电极来制备高效的非晶硅/晶体硅异质结太阳能电池。配备所提出的微电网金属电极的太阳能电池表现出 40.1 mA/cm(2) 的高短路电流密度（JSC），并实现了 18.4%的高效率，开路电压（VOC）为 618 mV，填充因子（FF）为 74.1%，这是由于微电网金属电极缩短了载流子路径长度并减小了电极面积。此外，通过优化电极形成的工艺顺序，我们能够有效地恢复微电网金属电极形成过程中导致的 VOC 降低。这项工作有望成为一项基础研究，可以通过优化透明电极和金属电极来有效降低非晶硅/晶体硅异质结太阳能电池的电流损耗。
