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首页> 外文期刊>Optical Materials >Improvement of intramolecular charge transfer within a donor-acceptor blend by doping novel synthesized benzothiadiazole small molecules in solid state
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Improvement of intramolecular charge transfer within a donor-acceptor blend by doping novel synthesized benzothiadiazole small molecules in solid state

机译：通过掺杂固态的新型合成苯并噻二唑小分子改善供体-受体混合物内的分子内电荷转移

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摘要

Three electron-deficient small molecules based on 2,1,3-benzothiadiazole (BTD) units namely, 4,7-bis (3-methoxyphenyl)-2,1,3-benzothiadiazole (BT1), (3-{7-[3-(dimethylamino)phenyl]-2,1,3-benzothiadi-azole-4-yl}phenyl)dimethylamine (BT2) and 3,3'-(2,1,3-benzothiadiazole-4,7-dyl)dianiline (BT3) were synthesized and their photophysical properties were investigated systematically to understand their potential usage in ternary organic solar cells (OSCs) as additive material to enhance the cell efficiency. All these molecules show broad absorption bands in 350-750 nm on glass substrate and their optical band gaps were calculated to be around 2.50-2.80 eV. BTD fluorescence dynamics were measured in polymer:BT1:fullerene blends with varying emission wavelengths of active layer. Fluorescence emission and time resolved measurements indicated photoinduced energy shift from BT1 dye to fullerene and also from polymer to BT1 dye upon excitation of the active layer.
机译：基于2,1,3-苯并噻二唑（BTD）单元的三个缺电子小分子，即4,7-双（3-甲氧基苯基）-2,1,3-苯并噻二唑（BT1），（3- {7- [ 3-（二甲基氨基）苯基] -2,1,3-苯并噻二唑-4-基}苯基）二甲基胺（BT2）和3,3'-（2,1,3-苯并噻二唑-4,7-二基）二苯胺合成了BT3（BT3），并对其光物理性质进行了系统研究，以了解其在三元有机太阳能电池（OSC）中作为添加剂的潜在用途，以提高电池效率。所有这些分子在玻璃基板上显示了在350-750 nm的宽吸收带，其光学带隙经计算约为2.50-2.80 eV。在具有不同活性层发射波长的聚合物：BT1：富勒烯共混物中测量了BTD荧光动力学。荧光发射和时间分辨的测量结果表明，在激活层激发后，光诱导的能量从BT1染料转移到富勒烯，也从聚合物转移到BT1染料。

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