Porphycene Dimer Based Non-Fullerene Acceptor for Organic Solar Cell
Porphycene Dimer Based Non-Fullerene Acceptor for Organic Solar Cell
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用于有机太阳能电池的基于卟啉二聚体的非富勒烯受体
DOI：
10.1142/s1088424616501108
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
H. Yamada
中科院分区：
文献类型：
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作者：
T. Okabe;D. Kuzuhara;M. Suzuki;N. Aratani;H. Yamada
以2，7，12，17-四己基-3-碘卟啉为原料，在钯催化下通过偶联反应合成了以亚苯基和2，5-噻吩基为连接基的卟啉二聚体（DPc-mP和DPc-T）。卟啉二聚体的晶体结构表明，间苯键提供了两个卟啉单元之间的高度扭曲结构，二面角为103°，而噻吩键提供了两个卟啉单元之间的近平面结构。这些卟啉二聚体在可见光至近红外区都表现出很强的吸收，其HOMO和LUMO能级与P3 HT作为a型材料组合，可以作为有机太阳能电池（OSC）的a型材料。用空间电荷限制电流法（SCLC）测得卟啉二聚体与P3 HT共混膜的空穴和电子迁移率，DPc-mP：P3 HT分别为3.7 × 10 ~ 2和0.26 × 10 ~ 2·V·s，DPc-T：P3 HT分别为3.2 × 10 ~ 2和0.027 × 10 ~ 2·V·s。原子力显微镜（AFM）和薄膜X射线衍射分析（XRD）结果表明，卟啉二聚体和P3 HT的共混膜形成了表面光滑、粗糙度低的非晶态薄膜，而卟啉单体和P3 HT的共混膜形成了具有大畴结构的高度结晶薄膜.由卟啉二聚体和P3 HT组成的OSC的功率转换效率为0.08%，是单体OSC的两倍。
Porphycene dimers connected by-phenylene (DPc–mP) and 2,5-thienylene (DPc–T) linkages have been synthesized from 2,7,12,17-tetrahexyl-3-iodoporphycene by palladium-catalyzed cross-couplings. The crystal structures of porphycene dimers revealed thatmeta-phenylene linkage provides a highly twisted structure with the dihedral angel of 103° between two porphycene units, while thienylene linkage provides a nearly planar structure of two porphycene units. These porphycene dimers showed strong absorption thorough the visible to NIR regions and HOMO and LUMO energy levels of them are suitable as-type materials of organic solar cells (OSCs) in combination withP3HTas a-type material. The hole and electron mobilities of the blended films of the porphycene dimers andP3HTobtained by space-charge-limited-current (SCLC) method were 3.7 × 10and 0.26 × 10cm2.V.sforDPc–mP:P3HT, and 3.2 × 10and 0.027 × 10cm2.V.sforDPc–T:P3HT. Atomic force microscopy (AFM) and thin-film X-ray diffraction analysis (XRD) measurements indicated that the blended films of the porphycene dimers andP3HTformed amorphous films with smooth and low-roughness surfaces, whereas the blended film of porphycene monomer andP3HTcreated the highly crystalline film with huge domain structures. The OSCs composed of porphycene dimers andP3HTshowed power conversion efficiencies of 0.08% was twice as high as that of monomer-based OSC.