Development of naphthalene and quinoxaline-based donor-acceptor conjugated copolymers for delivering high open-circuit voltage in photovoltaic devices
作者:Myung-Jin Baek、Hanok Park、Pranabesh Dutta、Woo-Hyung Lee、In-Nam Kang、Soo-Hyoung Lee
DOI:10.1002/pola.26567
日期:2013.4.15
optical studies, the copolymers have comparable optical band gap (∼2 eV) and nearly similar deep highest occupied molecular orbital (HOMO) energy levels of −5.59 (PNQx‐p) and −5.61 eV (PNQx‐p). The resulting copolymers possessed relatively low HOMO energy levels promising good air stability and high open circuit voltage (Voc) for photovoltaic applications. The optimized photovoltaic device with a structure
两种新的基于喹喔啉的聚合物,聚[1,5-二癸氧基萘-alt-5,5'-(5,8-二噻吩-2-基)-2-,3-二(4-辛氧基氧基苯基)喹喔啉(PNQx-p) Suzuki偶联合成了聚[1,5-二癸氧基萘-alt-5,5'-(5,8-二噻吩-2-基)-2-3-双(3-辛氧基氧基苯基)喹喔啉(PNQx-m)。反应和表征。热重分析表明,这些聚合物在降解温度高达320°C时具有热稳定性。从电化学和光学研究中可以明显看出,该共聚物具有可比的光学带隙(〜2 eV)和近乎相似的深最高占据分子轨道(HOMO)能级,分别为-5.59(PNQx-p)和-5.61 eV(PNQx-p) )。所得共聚物具有相对较低的HOMO能级,从而保证了良好的空气稳定性和较高的开路电压(V oc)用于光伏应用。具有ITO / PEDOT:PSS / PNQx-m:PC 71 BM(1:2,w / w)/ LiF / Al结构的优化光伏器件显示了高达2