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首页> 外文期刊>Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology >High-efficiency polymer photovoltaic cells using a solution-processaMe insulating interfacial nanolayer: the role of the insulating nanolayer
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High-efficiency polymer photovoltaic cells using a solution-processaMe insulating interfacial nanolayer: the role of the insulating nanolayer

机译：使用溶液处理绝缘界面纳米层的高效聚合物光伏电池：绝缘纳米层的作用

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摘要

We employed a low-cost solution-processed ultrathin insulating polymeric layer of poly(4-hydroxystyrene) (PHS), with a high glass transition temperature (T_g ~ 185 °C), as an interfacial layer between the polymer:fullerene photoactive layer and the Al negative electrode for enhancing device power conversion efficiency (PCE) of polymer bulk-heterojunction photovoltaic cells and investigated the roles of the interfacial nanolayer by ultraviolet photoemission spectroscopy and capacitance-voltage measurement. The thin polymeric layer forms a dipole layer and causes the vacuum level of the adjacent negative electrode to shift upward, which resulted in an increase of the built-in potential. As a result, the open-circuit voltage and PCE of the device using a PHS nanolayer were remarkably improved. We finally achieved a very high PCE of 6.5% with the PHS/Al negative electrode which is even much better than that of the device using an Al electrode (5.0%). The solution-processed inexpensive PHS layer with a high T_g can be an attractive alternative to conventional vacuum-deposited low-work-function metal and insulating metal fluoride interfacial layers.
机译：我们采用了一种低成本的，溶液处理的，具有高玻璃化转变温度（T_g〜185°C）的聚（4-羟基苯乙烯）（PHS）的超薄绝缘聚合物层作为聚合物：富勒烯光敏层和聚合物之间的界面层。铝负电极，用于提高聚合物体-异质结光伏电池的器件功率转换效率（PCE），并通过紫外光发射光谱法和电容电压测量研究了界面纳米层的作用。薄的聚合物层形成偶极子层，并使相邻负极的真空度向上移动，从而导致内置电势增加。结果，使用PHS纳米层的器件的开路电压和PCE显着提高。我们最终使用PHS / Al负极实现了6.5％的非常高的PCE，这甚至比使用Al电极的设备（5.0％）还要好得多。具有高T_g的溶液处理的廉价PHS层可以是常规真空沉积的低功函数金属和绝缘金属氟化物界面层的有吸引力的替代物。

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