Abstract It is an important strategy to improve the performance of polymer solar cells (PSCs) by incorporating metal nanoparticles into functional layers. Herein, gold (Au)@titanium dioxide (TiO2) plasmonic core-shell nanoparticles (PCSNPs) are synthesized and doped into zinc oxide (ZnO) as hybrid electron transport layer in PSCs. Improved light trapping and electrical conductivity are achieved through localized surface plasma resonance of Au@TiO2 PCSNPs. As a result, the short-circuit current density is apparently enhanced, while remaining the unchanged open-circuit voltage. The maximum PCE of 8.801% is obtained when 1.5 wt% Au@TiO2 PCSNPs are introduced into the ZnO layer. This study provides a new inspiration for the development of high efficiency PSCs.

中文翻译：

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通过缓冲层掺杂改善聚合物太阳能电池的光收集和电荷提取

摘要 将金属纳米粒子引入功能层是提高聚合物太阳能电池（PSCs）性能的重要策略。在此，金（Au）@二氧化钛（TiO2）等离子体核壳纳米粒子（PCSNPs）被合成并掺杂到氧化锌（ZnO）中作为PSCs中的混合电子传输层。通过 Au@TiO2 PCSNPs 的局部表面等离子体共振实现了更好的光捕获和电导率。结果，短路电流密度明显提高，而开路电压保持不变。当 1.5 wt% Au@TiO2 PCSNPs 被引入 ZnO 层时，获得了 8.801% 的最大 PCE。该研究为高效PSC的开发提供了新的启示。