A Double-Cable Poly(fluorene-alt-thiophene) with Bay-Substituted Perylenediimide Pendants: An Efficient Interfacial Material in Bulk-Heterojunction Solar Cells
A Double-Cable Poly(fluorene-alt-thiophene) with Bay-Substituted Perylenediimide Pendants: An Efficient Interfacial Material in Bulk-Heterojunction Solar Cells
复制标题
具有海湾取代苝二酰亚胺悬垂的双缆聚(氟-噻吩)
DOI：
10.1021/acs.macromol.7b01792
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发表时间：
2018-01-09
期刊：
影响因子：
5.5
通讯作者：
Gao, Deqing
中科院分区：
文献类型：
--
作者：
Chen, Naiwu;Lu, Jurong;Gao, Deqing
以聚芴-马来酰亚胺（PFT）为主链，正丁氧基为连接基团，苝酰亚胺（PDI）为侧链，制备了一种可溶液加工的双缆聚合物（PFT-PDI）。PFT-PDI几乎是不导电的，空穴和电子迁移率在10（-10）的数量级。没有电荷转移，但能量转移从供体PFT链到受体PDI单元。P3 HT/PCBM界面处的PFTPDI通过PFT单元的空穴传输通道和沿着PDI链的电子传输通道，促进了P3 HT激子的有效电荷产生和电荷传输，提高了电池光电流。具有3wt%的掺杂PFT-PDI的封装电池ITO/MoO/P3 HT：PCBM：PFT-PDI/LiF/Al表现出4.50%的最大功率转换效率（PCE），相对于来自没有掺杂的电池的3.53%的PCE，增加了27.5%。PFT-PDI掺杂大大改善了电池的稳定性，初始PCE的损失为5.8%，与之相比，在储存7天后，参比器件的PCE损失为29.7%。
A solution-processable double-cable polymer (PFT-PDI), composed of the backbone poly(fluorene-alt-hiophene) (PFT), the n-butoxyl linker, and the pendants perylenediimides (PDI), was developed. PFT-PDI was almost nonconductive with the hole and electron mobilities in the order of 10(-10). There was no charge transfer but energy transfer from the donor PFT chain to the acceptor PDI units. With a hole-transporting channel from the stacked PFT units and an electron-transporting channel along PDI chain, PFTPDI at the P3HT/PCBM interface facilitated the effective charge generation from P3HT excitons and charge transporting and enhanced the cell photocurrent. The encapsulated cell ITO/MoO/P3HT:PCBM:PFT-PDI/LiF/Al with doping PFT-PDI of 3 wt % demonstrated the maximum power conversion efficiency (PCE) of 4.50%, increasing by 27.5%, relative to PCE of 3.53% from the cell without doping. The PFT-PDI doping much improved the cell's stability with the loss of the initial PCE of 5.8%, in contrast to 29.7% from the reference device after being stored for 7 days.