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Low-temperature in-situ preparation of ZnO electron extraction layer for efficient inverted polymer solar cells

机译:低温原位制备高效反向聚合物太阳能电池ZnO电子提取层

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摘要

The facile in-situ fabricated interfacial layers for highly efficient and stable polymer solar cells (PSCs) have garnered extensive attention. Herein, low-temperature in-situ prepared ZnO derived from zinc acetylacetonate (Zn(acac)(2)) is used as electron extraction cathode interfacial layer (CIL) in inverted PSCs. The chemical component, optical features, electron mobility and charge transfer properties of the low-temperature in-situ obtained ZnO CIL are detailedly studied by X-ray photoelectron spectroscopy (XPS), ultraviolet visible (Uv-vis) spectra, space charge limited current (SCLC) and time-resolved photoluminescence (TRPL) measurements, respectively. The obtained ZnO layer demonstrates outstanding optical and electrical properties. Via fine-tuning the parameters of film processing, a record high power conversion efficiency (PCE) up to 11.65% is obtained for PBDB-T:IT-M-based PSCs, indicating ZnO significantly facilitates carrier transportation and induces fast charge transfer to electrode. The low-temperature in-situ prepared ZnO CIL can be further applied into the large-area and flexible PSCs.
机译:用于高效和稳定的聚合物太阳能电池(PSC)的便捷的现场制造界面层已引起广泛关注。在此,从乙酰丙酮锌(Zn(acac)(2))衍生的低温原位制备的ZnO用作反向PSC中的电子提取阴极界面层(CIL)。通过X射线光电子能谱(XPS),紫外可见(Uv-vis)光谱,空间电荷限制电流详细研究了低温原位获得的ZnO CIL的化学成分,光学特性,电子迁移率和电荷转移特性(SCLC)和时间分辨光致发光(TRPL)测量。所获得的ZnO层表现出优异的光学和电性能。通过微调薄膜处理的参数,基于PBDB-T:IT-M的PSC可获得高达11.65%的创纪录高功率转换效率(PCE),这表明ZnO显着促进了载流子的传输并促使电荷快速转移至电极。低温原位制备的ZnO CIL可以进一步应用于大面积柔性PSC。

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