阴极界面修饰对有机太阳能电池性能的影响

发布时间：2018-06-08 06:49

本文选题：有机太阳能电池 + 阴极界面修饰　；参考：《南京邮电大学》2017年硕士论文

【摘要】：有机太阳能电池以其成本低,制备工艺简单,可大面积制备,灵活应用于柔性器件且有机材料来源广泛等诸多优势被人们认为是解决能源危机与环境污染的理想候选者。本篇论文主要针对阴极修饰层对聚合物太阳能电池各方面性能产生的影响进行了研究,分别从以下三个部分展开:(1)我们采用无机材料铝和氯化钠复合修饰ITO做倒置结构有机太阳能电池的阴极缓冲层,使器件各方面性能均有大幅度提高。在多次重复实验的情况下获得了功率转换效率(PCE)为3.88%的器件。最佳器件的性能远比仅用铝或者氯化钠修饰的器件高出很多。更重要的是我们器件的稳定性是传统器件的1.7倍。性能的提高主要归功于铝和氯化钠修饰ITO后使ITO的功函数从4.75 eV降到3.90 eV。(2)研究有机小分子做阴极缓冲层对基于P3HT:PC61BM共混物为有源层的有机太阳能电池各方面性能的影响。四种阴极缓冲层:BCP,TPBi,Alq3和TmPyPB插在活性层和金属阴极之间,这些材料对器件的性能起主导作用。通过使用上述阴极缓冲层,器件的性能得到大幅度的改善。同时在稳定性方面我们也进行了深入的研究,结果表明,缓冲层为TmPyPB的器件比缓冲层为其他有机材料的器件在稳定性方面具有明显优势。十五天后器件效率仍然在原始数据的80%以上,其性能可以与无机材料相比较。(3)制备了基于ZnPc(OC8H_(17)OPyCH_3I)_8为阴极缓冲层的倒置有机太阳能电池。对阴极缓冲层薄膜分别进行了溶剂蒸汽退火和过渡舱惰性气体流退火处理,并利用原子力显微镜(AFM)对缓冲层表面形貌进行了研究。结果表明:这两种退火方法都能使缓冲层形貌得以改善。电池效率(PCE)从2.14%提高到3.76%。同时与传统器件相比较基于退火处理的阴极缓冲层器件稳定性也得到了改善,使得器件寿命提高1.4倍。这种简单阴极界面处理方法是聚合物太阳能电池特性得以改善的有效途径。
[Abstract]:Organic solar cells are considered to be ideal candidates for solving energy crisis and environmental pollution because of their advantages such as low cost, simple preparation process, large area preparation, flexible application in flexible devices and a wide range of organic materials. In this paper, the effect of cathode modification layer on the performance of polymer solar cells is studied. We use inorganic material aluminum and sodium chloride to modify ITO as cathode buffer layer of inverted organic solar cells. The device with power conversion efficiency of 3.88% has been obtained under repeated experiments. The performance of the optimal device is much higher than that of the device modified only with aluminum or sodium chloride. More importantly, our devices are 1.7 times more stable than conventional devices. The improvement of performance is mainly attributed to the reduction of the work function of ITO from 4.75 EV to 3.90 EV / m2 after modification of ITO by aluminum and sodium chloride. The effect of organic small molecules as cathode buffer layer on the performance of organic solar cells based on P3HT: PC61BM blend as active layer is studied. Four kinds of cathode buffer layer: BCP-TPBiAlq3 and TmPyPB are intercalated between the active layer and the metal cathode. These materials play a leading role in the performance of the device. By using the cathode buffer layer mentioned above, the performance of the device is greatly improved. The results show that the devices with TmPyPB buffer layer have obvious advantages over those with other organic materials. After 15 days, the device efficiency is still over 80% of the original data, and its performance can be compared with that of inorganic materials. The cathodic buffer film was treated by solvent vapor annealing and transition chamber inert gas flow annealing respectively. The surface morphology of the buffer layer was studied by atomic force microscopy (AFM). The results show that both annealing methods can improve the morphology of buffer layer. Battery efficiency increased from 2.14% to 3.76%. At the same time, compared with the traditional devices, the stability of the cathodic buffer layer devices based on annealing treatment is improved, and the lifetime of the devices is increased by 1.4 times. This simple cathode interface treatment method is an effective way to improve the characteristics of polymer solar cells.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM914.4

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