Efficient tandem polymer photovoltaic cells with two subcells in parallel connection

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• 作者：Xiaoyang Guo ; Fengmin Liu ; Wei Yue ; Zhiyuan Xie ; Yanhou Geng ; Lixiang Wang
• 关键词：Polymer photovoltaic cells ; Tandem structure ; Parallel connection ; Absorption coverage
• 刊名：Organic Electronics
• 出版年：2009
• 出版时间：September 2009
• 年：2009
• 卷：10
• 期：6
• 页码：1174-1177
• 全文大小：334 K

文摘

Tandem polymer photovoltaic cells with the subcells having different absorption characteristics in series connection are widely investigated to enhance absorption coverage over the solar spectrum. Herein, we demonstrate efficient tandem polymer photovoltaic cells with the two stacked subcells comprising different band-gap conjugated polymer and fullerene derivative bulk heterojunction in parallel connection. A semitransparent metal layer combined with inorganic semiconductor compounds is utilized as the intermediate electrode of the two stacked subcells to create the required built-in potential for collecting photo-generated charges. The short-circuit current of the stacked cell is the sum of the subcells and the open-circuit voltage is similar to the subcells.