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首页> 外文期刊>Thin Solid Films >Enhanced photostability in polymer solar cells achieved with modified electron transport layer
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Enhanced photostability in polymer solar cells achieved with modified electron transport layer

机译：改进的电子传输层可提高聚合物太阳能电池的光稳定性

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摘要

Photostability of the polymer solar cells (PSCs) remains a challenge to attain, as number of factors including the electron transport layers contribute to the degradation of PSCs when they are tested under 1 sun illumination, along with heat and humidity. Especially electron transport layers (ETLs) have considerable contribution to the overall degradations in these solar cells. Most studied ETL into the fabrication of inverted PSCs is zinc oxide (ZnO) yet the photostability of these PSCs is limited. This degradation most probably occurred due to the direct contact of zinc metal with the photoactive layer. This interface between ZnO and photoactive layer results in the initiation of degradations in PSCs. Keeping in view of this issue, we have modified the ZnO ETL by mixing ZnO nano particles with ethoxylated polyethyleneimine (PEIE) and then passivating this modified ZnO (m-ZnO) with ultrathin PEIE buffer layer. The power conversion efficiency is not affected by this approach, but when PSCs were subjected to 1 sun illumination, these m-ZnO/PEIE based PSCs have shown the enhanced light soaking (LS) stability. These findings indicate that optimizing the interface between the photoactive layer and the electron transport layer can lead to enhanced LS stability.
机译：聚合物太阳能电池（PSC）的光稳定性仍然是一个挑战，因为在1种阳光照射下测试时，包括电子传输层在内的许多因素都会导致PSC的降解以及热量和湿度。尤其是电子传输层（ETL）对这些太阳能电池的整体退化有很大贡献。制备反相PSC的研究最多的ETL是氧化锌（ZnO），但这些PSC的光稳定性受到限制。这种降解很可能是由于锌金属与光敏层的直接接触而发生的。 ZnO和光敏层之间的这种界面导致PSC降解开始。考虑到这个问题，我们通过将ZnO纳米颗粒与乙氧基化聚乙烯亚胺（PEIE）混合，然后将该改性的ZnO（m-ZnO）与超薄PEIE缓冲层钝化，从而对ZnO ETL进行了改性。功率转换效率不受此方法的影响，但是当PSC经受1次日光照射时，这些基于m-ZnO / PEIE的PSC表现出增强的浸光（LS）稳定性。这些发现表明优化光敏层和电子传输层之间的界面可以导致增强的LS稳定性。

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