Ambade Swapnil B, Ambade Rohan B, Lee Wonjoo, Mane Rajaram S, Yoon Sung Cheol, Lee Soo-Hyoung
School of Semiconductor and Chemical Engineering, Chonbuk National University, 664-14, 1-ga Deokjin-dong, Deokjin-gu, Jeonju, Jeonbuk 561-756, Republic of Korea.
Nanoscale. 2014 Oct 21;6(20):12130-41. doi: 10.1039/c4nr03080j.
This work reports on inverted polymer solar cells (IPSCs) based on highly transparent (>95%), hydrophobic, seedless ZnO nanorods (NRs) as cathode buffers with extremely enhanced electrical characteristics. The transparent NR suspension with stability for more than a year is achieved by adding a small amount of 2-(2-methoxyethoxy) acetic acid (MEA). The ability of the stable nanorod suspension to easily spin-coat is certainly an advance to the fabrication of films over large areas and to replace the conventional seeding method to grow one-dimensional nanostructures for use in optoelectronic devices. We observe a strong correlation between the photovoltaic performance and the transparency of ZnO NRs. IPSCs using poly-3-hexylthiophene (P3HT) and [6,6]-phenyl C60 butyric acid methyl ester (PCBM) mixtures in the active layer and transparent (MEA-capped) ZnO NRs as cathode buffers exhibit a power conversion efficiency of 3.24% under simulated AM 1.5G, 100 mW cm(-2) illumination.
这项工作报道了基于高透明（>95%）、疏水、无籽的ZnO纳米棒（NRs）作为具有极其增强电学特性的阴极缓冲层的倒置聚合物太阳能电池（IPSCs）。通过添加少量的2-(2-甲氧基乙氧基)乙酸（MEA）实现了具有超过一年稳定性的透明NR悬浮液。稳定的纳米棒悬浮液易于旋涂的能力对于大面积薄膜的制备以及取代用于光电器件的一维纳米结构生长的传统种子法而言无疑是一项进展。我们观察到光伏性能与ZnO NRs的透明度之间存在很强的相关性。在活性层中使用聚-3-己基噻吩（P3HT）和[6,6]-苯基C60丁酸甲酯（PCBM）混合物以及透明（MEA封端）ZnO NRs作为阴极缓冲层的IPSCs在模拟AM 1.5G、100 mW cm(-2)光照下表现出3.24%的功率转换效率。
