分层结构的聚合物光伏薄膜

The Gradient-layered Structure of the Polymer ？hotovoltaic Films

由于人们对洁净可再生能源的迫切需求，以及有机聚合物电池具有柔性，成本低，能够使用印刷方法大规模生产等优点，使得有机聚合物光伏电池成为了一个非常热门的研究方向。由于本体异质结（BHJ）本身的特点以及传统结构的缺陷，使得具有倒置分层结构的聚合物：富勒烯太阳能薄膜成为了一种发展趋势。通过控制溶剂挥发时间（自然分层）和加入一定量BCP（诱导分层）可以得到具有梯度分层结构的P3HT：PCBM共混薄膜，与传统本体异质结P3HT：PCBM共混薄膜相比，两种薄膜的能量转换效率基本相同，简化了倒置结构太阳能电池的工艺，对于聚合物太阳能电池的产业化生产具有积极地推动作用。

Organic polymer photovoltaic cells are becoming an extremely active research area to meet the urgent need for clean and renewable energy managements due to their potential applications as flexible, low cost and solution processable energy sources. Because of the characteristics of the bulk heterojunction （BHJ） and the disadvantages of traditional structure, makes the gradientlayered polymer： fullerene blend films has become a trend. Through controlling solvent evaporation time （natural layer） and adding a certain volume BCP （induced layer）, P3HT： PCBM blend films with gradient-layered structure are achieved. Compared to the traditional bulk heterojunction P3HT： PCBM blend film, it can offer nearly the same power conversion efficiency of solar cell. Two methods simplify solar cells technology, and play a positive role in the industrialization of polymer solar cells.