掺杂四丁基六氟磷酸铵对单层体异质结有机太阳能电池性能的影响

C. Yap, M. Yahayaa, Matarneh Muhamad
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摘要

有机太阳能电池因其具有生产柔性和大面积太阳能电池的巨大潜力,且成本相对较低且易于加工制造特性而引起了相当大的兴趣[1-2]。本文报道了以氧化铟锡(ITO)为阳极,聚[2-甲氧基-5-(2-乙基己氧基)-1,4-苯基乙烯](MEHPPV)为供体,(6,6)-苯基- c61丁酸甲酯(PCBM)为受体,铝(Al)为阴极,有机盐四丁基六氟磷酸铵(TBAPF6)掺杂对ITO/MEHPPV:PCBM/Al结构的单层异质结有机太阳能电池性能的影响。采用旋涂技术制备活性层。采用Keithley 237源测量单元,在100 mW/cm2的卤素投影灯照射下对有机太阳能电池进行了电流电压测量。如图1所示,与未掺杂器件相比,掺杂TBAPF6器件的短路电流密度Jsc和开路电压Voc均有显著增加。在100 mW/cm2的卤素投影灯照射下,未掺杂器件的Jsc为0.54µa /cm2, Voc为0.24 V,填充因子(FF)为16%。掺杂TBAPF6后,Jsc增加了近10倍,达到6.41µA/cm2。此外,Voc也从0.24 V显著提高到0.50 V。这种显著的改善是由于在电极/活性层界面处离子种类的积累导致内置电场的增加。因此,TBAPF6掺杂已被证明是提高有机太阳能电池性能的一种简单而经济的方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Influence of tetrabutylammonium hexafluorophosphate doping on the performance of single layer bulk heterojunction organic solar cells
Organic solar cells have attracted considerable interest due to their great potential for the production of flexible and large-area solar cells at relatively low costs and easy-processing fabrication properties [1–2]. The present work reports the effect of organic salt, tetrabutylammonium hexafluorophosphate (TBAPF6) doping on the performance of single layer bulk heterojunction organic solar cell with ITO/MEHPPV:PCBM/Al structure where indium tin oxide (ITO) was used as anode, poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEHPPV) as donor, (6,6)-phenyl-C61 butyric acid methyl ester (PCBM) as acceptor and aluminium (Al) as cathode. The active layer was prepared by spin coating technique. The organic solar cells were characterized by current-voltage measurements under illumination with a halogen projector lamp at 100 mW/cm2 using Keithley 237 source measurement unit. As shown in Fig.1, the device doped with TBAPF6 demonstrated a significant increment in the short circuit current density, Jsc and open circuit voltage, Voc as compared to the undoped device. Under illumination of a halogen projector lamp at 100 mW/cm2, the undoped device showed a Jsc of 0.54 µA/cm2, Voc of 0.24 V, and a fill factor (FF) of 16%. With the doping of TBAPF6, the Jsc increased almost ten times to 6.41 µA/cm2. Besides, the Voc also improved significantly from 0.24 V to 0.50 V. The significant improvement was attributed to the increase of built-in electric field caused by accumulation of ionic species at the electrode/active layer interfaces. Therefore, TBAPF6 doping has been shown to be a simple and cost-effective approach to increase the performance of organic solar cell.
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