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Green-solvent-processed hybrid solar cells based on donor–acceptor conjugated polyelectrolyte

机译:基于供体-受体共轭聚电解质的绿色溶剂处理混合太阳能电池

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In this work, a quaternary ammonium side chain modified conjugated polyelectrolyte PFBTBr, with excellent solubility in nonaromatic and nonhalogenated solvents, was designed and synthesized as the donor material for the green-solvent-processed hybrid solar cells (HSCs). By introducing the donor–acceptor structure, PFBTBr shows a lower lying highest occupied molecular orbital (HOMO) level and a broad absorption from 300 to 700 nm. Incorporating the water soluble CdTe nanocrystals (NCs) as acceptor, the green-solvent-processed HSCs based on conjugated polyelectrolyte and inorganic NCs were fabricated. Through the active layer optimization, a well blended donor/acceptor active layer with continuous electron/hole transport pathway and smoother surface was achieved. As a result, a photovoltaic efficiency of 3.67% was realized. After the further interfacial modification and chloride treatment, the power conversion efficiency of the green-solvent-processed HSCs was improved to 5.03% with the maximum external quantum efficiency value of 87.01% at 400 nm under the AM 1.5 G 100 mW cm ~(?2) illumination.
机译:在这项工作中,设计并合成了季铵侧链改性的共轭聚电解质PFBTBr,在非芳香族和非卤代溶剂中具有优异的溶解性,作为绿色溶剂处理的混合太阳能电池(HSC)的供体材料。通过引入施主-受主结构,PFBTBr显示出较低的最高占据分子轨道(HOMO)水平和300至700 nm的宽吸收。结合水溶性CdTe纳米晶体(NCs)作为受体,制备了基于共轭聚电解质和无机NCs的绿色溶剂处理的HSC。通过优化活性层,可以实现具有连续电子/空穴传输路径和光滑表面的良好混合的供体/受体活性层。结果,实现了3.67%的光伏效率。经过进一步的界面改性和氯化处理后,在AM 1.5 G 100 mW cm〜(?)下,经绿色溶剂处理的HSC的功率转换效率提高至5.03%,在400 nm处的最大外部量子效率值为87.01%。 2)照明。

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