Improved efficiency of solution processed small molecules organic solar cells using thermal annealing

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• 作者：Xiangjian Wan ; Yongsheng Liu ; Fei Wang ; Jiaoyan Zhou ; Guankui Long ; Yongsheng Chen ; ^{yschen99@nankai.edu.cn}
• 关键词：Solution process ; Small molecule ; Organic solar cell ; Bulk heterojunction
• 刊名：Organic Electronics
• 出版年：2013
• 出版时间：June, 2013
• 年：2013
• 卷：14
• 期：6
• 页码：1562-1569
• 全文大小：1960 K

文摘

A solution processable A-D-A-D-A structure small molecule DCAEH5TBT using a BT unit as the core has been designed and synthesized for application in BHJ solar cells. The device employing DCAEH5TBT/PC₆₁BM as active layer shows PCE of 2.43 % without any post treatment. After thermal annealing (150 ¡ãC, 10 min), the PCE of this molecule based device increased to 3.07 % , with J_sc of 7.10 mA/cm², V_oc of 0.78 V and FF of 55.4 % , which indicates that high performance of solution processed small molecule based solar cells can be achieved using thermal annealing by carefully design molecule structure.