Diketopyrrolopyrrole-based small molecules with simple structure for high VOC organic photovoltaics
Diketopyrrolopyrrole-based small molecules with simple structure for high VOC organic photovoltaics
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DOI：
10.1016/j.orgel.2012.09.004
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发表时间：
2012-12
影响因子：
3.2
通讯作者：
Jong Won Lee;Y. Choi;W. Jo
中科院分区：
文献类型：
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作者：
Jong Won Lee;Y. Choi;W. Jo
合成了一系列结构简单的二酮基吡咯并吡咯（DPP）小分子，并根据给电子单元的类型研究了它们的光伏性质。通过在A-D-A型小分子中引入噻吩（T）和亚苯基（Ph）等不同给电子能力的给体单元，可以有效地调节小分子的前线轨道能级。当与[6，6]-苯基-C_（71）-丁酸甲酯混合作为体异质结太阳能电池的活性层材料时，具有弱给电子单元Ph的小分子Ph（TDPP）_2表现出4.01%的功率转换效率和0.93V的显著高的开路电压。
A series of simple structured small molecules based on diketopyrrolopyrrole (DPP) are synthesized and their photovoltaic properties are investigated in terms of the type of electron donating unit. By introducing a donor unit with different electron-donating power such as thiophene (T) and phenylene (Ph), into A−D−A type small molecule, the frontier orbital energy levels of small molecules can effectively be tuned. The small molecule with a weak donor unit of Ph, Ph(TDPP)2exhibits a power conversion efficiency of 4.01% with a remarkably high open circuit voltage of 0.93V when it is blended with [6,6]-phenyl-C71-butyric acid methyl ester as an active layer material in bulk heterojunction solar cells.