All-Polymer Solar Cells with 3.3% Efficiency Based on Naphthalene Diimide-Selenophene Copolymer Acceptor
All-Polymer Solar Cells with 3.3% Efficiency Based on Naphthalene Diimide-Selenophene Copolymer Acceptor
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DOI：
10.1021/ja4085429
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发表时间：
2013-10-09
影响因子：
15
通讯作者：
Jenekhe, Samson A.
中科院分区：
文献类型：
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作者：
Earmme, Taeshik;Hwang, Ye-Jin;Jenekhe, Samson A.
缺乏合适的受体（n型）聚合物限制了聚合物/聚合物本体异质结（BHJ）太阳能电池的光电流和效率。在这里，我们报告了三种萘酰胺（NDI）共聚物作为BHJ太阳能电池中的电子受体的评估，发现基于NDI-硒代共聚物（PNDIS-HD）受体和噻唑噻唑共聚物（PSEHTT）供体的全聚合物太阳能电池表现出创纪录的3.3%的功率转换效率。所观察到的7.78mA/cm（2）的短路电流密度和47%的外部量子效率也是迄今为止在全聚合物太阳能电池中看到的最好的此类光伏参数。该效率与类似评价的[6，6]-苯基-C-61-丁酸甲酯（PC60 BM）/PSEHTT装置的性能相当。PNDIS-HD的层状结晶形态导致聚合物/聚合物共混物太阳能电池中平衡的电子和空穴传输，这是其良好光伏性能的原因。
The lack of suitable acceptor (n-type) polymers has limited the photocurrent and efficiency of polymer/polymer bulk heterojunction (BHJ) solar cells. Here, we report an evaluation of three naphthalene amide (NDI) copolymers as electron acceptors in BHJ solar cells which finds that all-polymer solar cells based on an NDI-selenophene copolymer (PNDIS-HD) acceptor and a thiazolothiazole copolymer (PSEHTT) donor exhibit a record 3.3% power conversion efficiency. The observed short circuit current density of 7.78 mA/cm(2) and external quantum efficiency of 47% are also the best such photovoltaic parameters seen in all-polymer solar cells so far. This efficiency is comparable to the performance of similarly evaluated [6,6]-Phenyl-C-61-butyric acid methyl ester (PC60BM)/PSEHTT devices. The lamellar, crystalline morphology of PNDIS-HD, leading to balanced electron and hole transport in the polymer/polymer blend solar cells accounts for its good photovoltaic properties.