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首页> 外文期刊>RSC Advances >All polymer solar cells with diketopyrrolopyrrole-polymers as electron donor and a naphthalenediimide-polymer as electron acceptor
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All polymer solar cells with diketopyrrolopyrrole-polymers as electron donor and a naphthalenediimide-polymer as electron acceptor

机译：所有聚合物太阳能电池与二酮吡咯醇聚合物作为电子供体和萘二酰亚胺聚合物作为电子受体

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摘要

Four typical diketopyrrolopyrrole (DPP)-based conjugated polymers were used as electron donors in all-polymer solar cells (PSCs) with a naphthalenediimide-based polymer N2200 as the electron acceptor. The four DPP polymers have near-infrared absorption spectra up to 1000 nm and suitable energy levels for charge separation from donor to acceptor. DPP polymer?:?N2200 cells were found to have high open circuit voltages in comparison to fullerene-based solar cells but with low short circuit current densities and fill factors, so that the power conversion efficiencies of these cells were relatively low (0.45–1.7%). These blends relatively had balanced but low hole and electron mobilities from space charge limit current measurements, small surface roughness, and highly quenched photoluminescence (PL) from steady-state PL. These studies show that the low photocurrent and performance arise from the miscibility of the DPP and N2200 polymers, which enhances the charge recombination. The finding was further confirmed by grazing incidence X-ray diffraction and resonant soft X-ray scattering. All the PSCs based on DPP polymers were investigated, opening further studies based on these systems due to the broad absorption, high carrier mobilities and good crystalline properties of DPP polymers.
机译：基于全聚合物太阳能电池（PSC）中的电子供体，用萘二酰亚胺基聚合物N2200用作电子供体作为电子受体的四种典型的二氧化吡咯烷吡咯（DPP）作为电子供体。四种DPP聚合物具有近红外吸收光谱，可达1000nm，并且适当的能量水平，用于从供体到受体的电荷分离。 DPP聚合物？发现N2200细胞与富勒烯的太阳能电池相比，具有高开关电压，但具有低电路电流密度和填充因子，因此这些细胞的功率转换效率相对较低（0.45-1.7 ％）。这些混合相对平衡但是从空间电荷限制电流测量，小表面粗糙度和高度淬火的光致发光（PL）的稳定但低孔和电子迁移率。这些研究表明，低光电流和性能来自DPP和N2200聚合物的混溶性，这增强了电荷重组。通过放牧入射X射线衍射和共振软X射线散射进一步证实了发现。研究了基于DPP聚合物的所有PSCS，由于宽的吸收，高载体迁移率和DPP聚合物的良好结晶性能，对这些系统进行进一步的研究。

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