The trade-off of light trapping between top and bottom cell in micromorph tandem solar cells with sputtering ZnO:Al glass substrate
The trade-off of light trapping between top and bottom cell in micromorph tandem solar cells with sputtering ZnO:Al glass substrate
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DOI：
10.1016/j.jpowsour.2014.04.150
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发表时间：
2014-11
影响因子：
9.2
通讯作者：
L. Bai;Bofei Liu;Jun Fan;Dekun Zhang;Changchun Wei;Jian Sun-;Ying Zhao;Xiaodang Zhang
中科院分区：
文献类型：
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作者：
L. Bai;Bofei Liu;Jun Fan;Dekun Zhang;Changchun Wei;Jian Sun-;Ying Zhao;Xiaodang Zhang
对p-i-n结构a-Si：H/μc-Si：H叠层太阳电池中光捕获和电流匹配之间的平衡进行了模拟和实验研究，旨在解决通常使用的掺氟氧化锡（SnO 2：F）衬底的低长波长光散射导致的有限短路电流密度（Jsc）。为此，通过利用具有优化的长波长光散射特性的ZnO：Al衬底作为前接触，减少了顶部电池和底部电池之间的Jsc的失配，从而以下部顶部电池的Jsc为代价改善了底部电池的响应。通过在上下两个单元之间引入n型μ c-SiO2中间反射层（IR），以SnO 2或ZnO：Al为衬底，实现了上下两个单元光响应的折衷。采用磁控溅射和织构刻蚀的ZnO：Al衬底和优化的n型μc-SiOxIR，a-Si：H/μc-Si：H叠层太阳电池在近似电流匹配下的初始效率达到11.90%。
A simulated and experimental investigation of the trade-off between light trapping and current matching in p-i-n structured a-Si:H/μc-Si:H tandem solar cells is presented, which aims to address the limited short circuit current density (Jsc) that results from the low long-wavelength light scattering of the fluorine-doped tin oxide (SnO2:F) substrates typically used. To this end, the mismatch of theJscbetween the top and bottom cells is reduced by utilizing a ZnO:Al substrate with optimized long-wavelength light scattering properties as the front contact, thereby improving the response of the bottom cell at the expense of the lower top cell'sJscyet. A trade-off between the top and bottom cell's light response is subsequently found with SnO2or ZnO:Al as a substrate, by introducing an n-type μc-SiOxintermediate reflector (IR) between the two component cells. An initial efficiency based on an approximate current matching of 11.90% is achieved for a-Si:H/μc-Si:H tandem solar cell by adopting a magnetron-sputtered and texture-etched ZnO:Al substrate and an optimized n-type μc-SiOxIR.