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首页> 外文期刊>Advanced energy materials >High-Efficiency Polymer Homo-Tandem Solar Cells with Carbon Quantum-Dot-Doped Tunnel Junction Intermediate Layer
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High-Efficiency Polymer Homo-Tandem Solar Cells with Carbon Quantum-Dot-Doped Tunnel Junction Intermediate Layer

机译：具有碳量子点掺杂隧道结中间层的高效聚合物均串联太阳能电池

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摘要

The tunnel junction (TJ) intermediate connection layer (ICL), which is the most critical component for high-efficient tandem solar cell, generally consists of hole conducting layer and polyethyleneimine (PEI) polyelectrolyte. However, because of the nonconducting feature of pristine PEI, photocurrent is open-restricted in ICL even with a little thick PEI layer. Here, high-efficiency homo-tandem solar cells are demonstrated with enhanced efficiency by introducing carbon quantum dot (CQD)-doped PEI on TJ-ICL. The CQD-doped PEI provides substantial dynamic advantages in the operation of both single-junction solar cells and homo-tandem solar cells. The inclusion of CQDs in the PEI layer leads to improved electron extraction property in single-junction solar cells and better series connection in tandem solar cells. The highest efficient solar cell with CQD-doped PEI layer in between indium tin oxide (ITO) and photoactive layer exhibits a maximum power conversion efficiency (PCE) of 9.49%, which represents a value nearly 10% higher than those of solar cells with pristine PEI layer. In the case of tandem solar cells, the highest performing tandem solar cell fabricated with C-dot-doped PEI layer in ICL yields a PCE of 12.13%; this value represents an approximate to 15% increase in the efficiency compared with tandem solar cells with a pristine PEI layer.
机译：隧道结（TJ）中间连接层（ICL）是高效串联太阳能电池最关键的组件，通常由空穴传导层和聚乙烯亚胺（PEI）聚电解质组成。但是，由于原始PEI的非导电特性，即使只有很少的PEI层，ICL中的光电流也会受到开路限制。在这里，通过在TJ-ICL上引入掺有碳量子点（CQD）的PEI可以提高效率，证明了高效率的串联太阳能电池。掺有CQD的PEI在单结太阳能电池和均串联太阳能电池的运行中均提供了巨大的动态优势。 PEI层中包含CQD导致单结太阳能电池的电子提取性能提高，而串联太阳能电池的串联效果更好。在铟锡氧化物（ITO）和光敏层之间具有CQD掺杂PEI层的效率最高的太阳能电池，其最大功率转换效率（PCE）为9.49％，这比具有原始质的太阳能电池的价值高出近10％ PEI层。对于串联太阳能电池，在ICL中用C点掺杂PEI层制造的性能最高的串联太阳能电池的PCE为12.13％；与具有原始PEI层的串联太阳能电池相比，该值表示效率大约提高了15％。

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