Ki Gyeongmin, Lee Jaemin, Lee Sang Kyu, Ahn Taek
J Nanosci Nanotechnol. 2018 Oct 1;18(10):6983-6986. doi: 10.1166/jnn.2018.15489.
Dithieno[3,2-b:2',3'-d]thiophene (DTT) has emerged as an important building block in the synthesis of a wide variety of optoelectronic materials. Two new DTT containing conjugated polymers, poly(dithieno[3,2-b:2',3'-d]thiophenevinylene-alt-9,9-diethylhexyl-2,7-fluorenediyl vinylene) (FLU-DTT) and poly(dithieno[3,2-b:2',3'-d]thiophenevinylene-alt-2-methoxy-5-(2-ethylhexyloxy)-p-phenylenevinylene) (MEH-DTT), were designed and synthesized. The photoluminescence (PL) spectra of FLU-DTT and MEH-DTT in film exhibit maximum emission peaks at 538 and 602 nm, respectively. The MEH-DTT polymer film showed far more red-shifted maximum electroluminescene (EL) emission at 650 nm. The photovoltaic device was also fabricated using MEH-DTT and PC71BM as active layer and it showed power conversion efficiency (PCE) for the polymer solar cell (PSC) as 0.59% under AM 1.5 G (100 mW/cm2) conditions.
二噻吩并[3,2 - b:2',3'- d]噻吩（DTT）已成为合成多种光电子材料的重要结构单元。设计并合成了两种含DTT的新型共轭聚合物，聚（二噻吩并[3,2 - b:2',3'- d]噻吩乙烯撑-alt-9,9 - 二乙基己基-2,7 - 芴二亚基乙烯撑）（FLU-DTT）和聚（二噻吩并[3,2 - b:2',3'- d]噻吩乙烯撑-alt-2 - 甲氧基-5 - （2 - 乙基己氧基）-对苯撑乙烯撑）（MEH-DTT）。FLU-DTT和MEH-DTT薄膜的光致发光（PL）光谱分别在538和602 nm处呈现最大发射峰。MEH-DTT聚合物薄膜在650 nm处显示出明显红移的最大电致发光（EL）发射。还使用MEH-DTT和PC71BM作为活性层制备了光伏器件，在AM 1.5 G（100 mW/cm²）条件下，该聚合物太阳能电池（PSC）的功率转换效率（PCE）为0.59%。
