State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, Beijing Key Laboratory of Energy Security and Clean Utilization, North China Electric Power University , Beijing 102206, China.
ACS Appl Mater Interfaces. 2013 Nov 13;5(21):10658-64. doi: 10.1021/am402745t. Epub 2013 Oct 22.
Highly efficient polymer solar cells (PSCs) are demonstrated by introducing environmentally friendly CuOx as hole extraction anode buffer layer. The CuOx buffer layer is prepared simply via spin-coating 1,2-dichlorobenzene solution of Copper acetylacetonate on the ITO substrate and thermal transformation (at 80 °C) in air. Remarkable improvements in the open-circuit voltage (Voc) and short-circuit current density (Jsc) of the PSCs could be achieved upon the introduction of CuOx buffer layer. The study about the effect of CuOx interfacial layer on the device resistances demonstrates that insertion of CuOx layer can decrease the whole resistance of the PSCs. For the devices based on P3HT:PCBM, the power conversion efficiency (PCE) was increased from 2.8% (the reference device without buffer layer) to 4.1% via introduction of CuOx hole extraction layer. The PCE of the PSC was further increased to 6.72% when ICBA used as an alternative acceptor to PCBM. The much higher PCE of 7.14% can be achieved by adopting PBDTTT-C, a low band gap conjugated polymer, as donor material. The results demonstrate that CuOx has great potential as a hole extraction material for highly efficient PSCs.
通过引入环保型 CuOx 作为空穴萃取阳极缓冲层，制备出高效聚合物太阳能电池（PSCs）。CuOx 缓冲层通过在 ITO 基底上旋涂乙酰丙酮铜的 1,2-二氯苯溶液，并在空气中进行热转化（80°C）来简单制备。在引入 CuOx 缓冲层后，PSCs 的开路电压（Voc）和短路电流密度（Jsc）显著提高。关于 CuOx 界面层对器件电阻影响的研究表明，插入 CuOx 层可以降低 PSCs 的整体电阻。对于基于 P3HT:PCBM 的器件，通过引入 CuOx 空穴萃取层，功率转换效率（PCE）从 2.8%（无缓冲层的参考器件）提高到 4.1%。当 ICBA 用作 PCBM 的替代受体时，PSC 的 PCE 进一步提高到 6.72%。采用低带隙共轭聚合物 PBDTTT-C 作为给体材料，可获得更高的 PCE 7.14%。结果表明，CuOx 作为高效 PSCs 的空穴萃取材料具有很大的潜力。
