The design of new polymers able to filter the electromagnetic spectrum and absorb distinctly in the UV and high-energy part of visible spectrum is crucial for the development of semi-transparent solar cells. Herein, we report on the synthesis and spectroscopic, electrochemical, and photophysical characteristics of three new polymers, namely (i) Poly(triamterene-co-terephthalate), (ii) Poly[triamterene-co- 3-(2-pyridyl)-5,6-diphenyl-1,2,4-triazine-p,p′-disulfonamide], and (iii) Poly(5-hydroxyindole-2-carboxylate) that might show promise as materials for semi-transparent solar cells. The energy band gap, refractive index, dielectric constant, and optical conductivity of the electron donor polymer, poly(triamterene-co-terephthalate), were determined to be 2.92 eV, 1.56, 2.44 and 2.43 × 104 S cm−1, respectively. The synthesized electron acceptor polymers showed a relatively high refractive index, dielectric constant, and optical conductivity. The presence of a direct allowed transition was confirmed between intermolecular energy bands of the polymers. The polymers showed relatively high energy gap and deep HOMO levels, making them strong absorbers of photons in the UV region and high energy part of the visible region. The synthesized donor and acceptors performed well relative to P3HT and fullerenes due to the close match of the HOMO and LUMO levels. With further development, the polymers could be viable for use as the active layers of semi-transparent solar cells.

中文翻译：

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高带隙聚合物的合成、光谱、电化学和光物理性质在半透明太阳能电池中的潜在应用

能够过滤电磁光谱并明显吸收可见光谱的紫外线和高能部分的新型聚合物的设计对于半透明太阳能电池的开发至关重要。在此，我们报告了三种新型聚合物的合成以及光谱、电化学和光物理特性，即（i）聚（氨苯蝶啶-对苯二甲酸），（ii）聚[氨苯蝶啶-co-3-（2-吡啶基）- 5,6-二苯基-1,2,4-三嗪-p,p'-二磺酰胺]和(iii)聚(5-羟基吲哚-2-羧酸酯)可能有望成为半透明太阳能电池的材料。电子给体聚合物聚对苯二甲酸氨苯蝶啶的能带隙、折射率、介电常数和光导率分别确定为2.92 eV、1.56、2.44 和2.43 × 104 S cm−1。合成的电子受体聚合物表现出相对较高的折射率、介电常数和光导率。证实了聚合物分子间能带之间存在直接允许的跃迁。这些聚合物表现出相对较高的能隙和较深的HOMO能级，使其成为紫外区和可见光区高能部分光子的强吸收体。由于 HOMO 和 LUMO 能级的紧密匹配，合成的供体和受体相对于 P3HT 和富勒烯表现良好。随着进一步的发展，这些聚合物可以用作半透明太阳能电池的活性层。