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Light absorption enhancement by embedding submicron scattering TiO2 nanoparticles in perovskite solar cells

机译:通过在钙钛矿太阳能电池中嵌入亚微米散射TiO2纳米粒子的光吸收增强

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Efficient light absorption is a key issue for hybrid perovskite solar cells (PSCs) to achieve better photovoltaic performances. Here, we introduce submicron scattering TiO _(2) (s-TiO _(2) ) nanoparticles into the mesoporous TiO _(2) layer to improve the overall light harvesting efficiency in PSCs. Obviously enhanced current density and power conversion efficiency (PCE) were accomplished due to the improved light trapping in the active layer. Corresponding enhancement mechanisms were studied by the absorption spectra and finite-difference time-domain (FDTD) simulation results. Electrochemical impedance spectroscopy (EIS) measurements were further carried out to investigate the charge transportation process influenced by introducing s-TiO _(2) into the mesostructured layer. With the optimized amount of embedded s-TiO _(2) , an average of over 5% PCE enhancement with an efficiency up to 16.72% was achieved compared with the regular mesostructured PSCs.
机译:高效的光吸收是杂交钙钛矿太阳能电池(PSC)以实现更好的光伏性能的关键问题。在此,我们将亚微米散射TiO_(2)(S-TiO _(2))纳米颗粒引入介孔TiO _(2)层中以改善PSC中的整体光学效率。显然,由于有源层的改善的光捕获,显着提高了电流密度和功率转换效率(PCE)。通过吸收光谱和有限差时域(FDTD)模拟结果研究了相应的增强机制。进一步进行电化学阻抗光谱(EIS)测量以研究通过将S-TiO _(2)引入型胶囊结构层的电荷运输过程。通过优化的嵌入式S-TiO_(2),与常规型腹腔结构的PSC相比,平均效率高达16.72%的PCE增强。

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