An air-stable inverted photovoltaic device using ZnO as the electron selective layer and MoO3 as the blocking layer

An air-stable photovoltaic device based on znic oxide nanoparticles (ZNP) in an inverted structure of indium tin oxide (ITO)/ZnO/poly (3-hexylthiophene) (P3HT): [6,6]-phenyl C61-butyric acid methyl ester (PCBM)/MoO3/Ag is studied. We find that the optimum thickness of the MoO3 layer is 2 nm. When the MoO3 blocking layer is introduced, the fill factor of the devices is increased from 29% to 40%, the power conversion efficiency is directly promoted from 0.35% to 1.27%.The stability under ambient conditions of this inverted structure device much is better due to the improved stability at the polymer/Ag interface. The enhancement is attributed to the high carriers mobility and suitable band gap of MoO3 layer.     

Plasmon-enhanced polymer bulk heterojunction solar cells with solution-processable Ag nanoparticles

We report the plasmon-enhanced polymer bulk-heterojunction solar cells with Ag nanoparticles (AgNPs) obtained via chemical method. Here, the AgNPs films with different particle densities are introduced between the poly (3,4-ethylene dioxythiophene) poly (styrenesulfonate) (PEDOT: PSS) buffer layer and the poly (3-hexythiophene):[6,6]-phenyl-c61 butyric acid methyl ester (P3HT: PCBM) layer. By improving the optical absorption of the active layer owing to the localized surface plasmons, the power conversion efficiency of the solar cells is increased compared with the control device. It is shown that the efficiency of the device increases with the density of AgNPs. For the device employing higher density, the resulted power conversion efficiency is found to increase from 2.89% to 3.38%, enhanced by 16.96%.     

油溶性含羟基紫精的合成及其电致变色器件的制备

通过四步合成步骤,制得了合有羟基的油溶性紫精.该紫精可以和聚(丙烯酸乙酯-甲基丙烯酸羟乙酯)以及异佛尔酮-二异氰酸酯(IPDI)经热固化形成电致变色器件的工作电极.二茂铁甲醇、聚(丙烯酸乙酯-甲基丙烯酸羟乙酯)、异佛尔酮-二异氰酸酯(IPDI)经热固化形成电致变色器件的对电极.工作电极、对电极和中间的凝胶电解质形成全固...     

Al掺杂ZnO纳米棒的性能研究及其在太阳能电池中的应用

通过水热法制备了不同质量分数(0%,0.5%,1.0%和1.5%)的Al 3+掺杂ZnO纳米棒,扫描电镜(SEM)、X射线衍射(XRD)、紫外-可见(UV-vis)吸收光谱等测试结果表明,通过这种方法得到了较为规整的ZnO纳米阵列,结晶良好、具有明显的c轴生长取向;掺杂浓度的增加对产物的形貌和晶体结构产生了明显的影响。通过瞬态光谱和面电阻测试发现,Al 3+掺杂提高了ZnO传导电子的能力。将Al 3+掺杂的ZnO纳米棒同时作为电极与电子传输层,应用于有机太阳能电池器件中,在低浓度(0.5at.%)掺杂时得到最佳的器件性能,相比于未掺杂的ZnO纳米棒,短路电流提高了30%,光电转化效率提高了50%。     

ZnO纳米颗粒表面缺陷对有机太阳能电池性能的影响

用温度控制ZnO纳米 颗粒粒径的大小,研究了颗粒粒径对表面缺陷的影响。由透射电镜(TEM)、紫外-吸收光谱 和荧光光谱测试表明,随着反应温度升高,ZnO纳米颗粒的尺寸增加,比表面积显著下降, 表面缺陷的体密度降低。将不同反应温 度下的ZnO纳米颗粒应用于ITO/ZnO/P3HT:PCBM/MoO₃/Ag结构的有机太阳能电池中,进一 步研究了缺陷对电池性能的影 响。实验结果表明,60℃下ZnO纳米颗粒薄膜作为电子传输层的器件 效果最好,电池效率可以达到3.05%。 这表明在一定范围内,ZnO纳米颗粒越大,缺陷密度越低,越有利于器件中电子的传输从而 提高太阳能电池器件的短路电流密度和光电转化效率。