烷基化角型萘并二噻吩之合成方法與其P型共軛高分子於有機太陽能電池之應用

為了開發以aNDT為延伸之高分子材料能夠有效應用於有機太陽能電池與有機場效電晶體中，aNDT之側鏈基修飾則為非常重要的因素，其不僅可以提升材料之溶解度外，也可以調控分子之電學性質與立體性質以便優化電子元件之表現。本研究提出一種有效率又簡易的合成方法，可在合成角型萘并二噻吩共軛平面結構時，透過鹼誘導連續6π電子環化反應亦可有選擇性地導入側鏈烷基於中心萘環之4、9或5、10號位置。並且成功合成出兩P型共軛高分子材料：PaNDTDTFBT與PaNDTDPP。其中PaNDTDTFBT:PC_(71)BM在反結構太陽能電池元件中可達6.86%之光電轉化效率，而PaNDTDPP擁有強烈之分子間作用力具有0.202 cm^2V^(-1)s^(-1)之電洞遷移率。

關鍵字

萘并二噻吩；溶液濕式製程；高分子太陽能電池；有機場效電晶體；側鏈基修飾； D-A共聚高分子

並列摘要

To create a new class of aNDT-based polymers for widespread applications in solution-processable OFETs and PSCs, side-chain engineering of the aNDT-based structures plays a pivotal role in improving solubility and optimizing electronic/steric properties associated with the resultant solar cell characteristics. In this research, we developed an efficient and straightforward methodology to construct the angular naphthodithophene core with regiospecific introduction of two aliphatic chains at its 4,9- or 5,10-positions via a base-induced double 6π-cyclization. For the first time, the corresponding 2,7-distannylated-4,9-dialkylated aNDT monomers were polymerized with FBT and DPP acceptors to make two new PaNDTDTFBT and PaNDTDPP donor−acceptor copolymers. The photovoltaic devices based on the PaNDTDTFBT:PC_(71)BM blend not only showed a promising PCE of 6.52% with conventional configuration but also achieved a higher PCE of 6.86% with inverted configuration. Moreover, PaNDTDPP with strong intermolecular interaction achieved a high FET hole mobility of 0.202 cm^2 V^(-1) s^(-1).

並列關鍵字

Naphthodithiophenes ； Solution-Processable Devices ； Polymer Solar Cells ； Field-Effect Transistors ； Side-Chain Engineering ； Donor-Acceptor Copolymers

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