用于高压和高性能有机太阳能电池的化烯侧链调节分子四极时刻
Tingting Dai1,2,3, Yuhan Meng4, Zongtao Wang4
1College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, China.
Journal of the American Chemical Society
|January 22, 2025
概括
在有机太阳能电池 (OSC) 中通过替代调节分子电荷四极相互作用,增强基态电荷生成 (GSCG). 这一策略导致OSC设备的功率转换效率 (PCE) 和高开路电压 (V_OC) 的记录.
科学领域:
- 材料科学
- 有机电子
- 太阳能发电
背景情况:
- 基态电荷生成 (GSCG) 对有机太阳能电池 (OSC) 性能至关重要,影响光生成载体行为和设备效率.
- 深度捕获能量水平可以捕获光生成载体,从而对OSC性能产生负面影响.
- 分子设计在控制GSCG和优化光活性层中的能量水平方面发挥着关键作用.
研究的目的:
- 研究原子替换对BTA3侧链的影响,以调节电荷四极电静相互作用并实现高效的GSCG.
- 在OSC性能背景下探索分子结构,能量水平 (HOMO/LUMO) 和GSCG之间的关系.
- 为高性能OSC设计高效接受器的分子策略.
主要方法:
- 合成的BTA3衍生物具有不同数量的替代物 (BTA3-8F,BTA3-16F).
- 分析了最高占成分子轨道 (HOMO) 和最低不占用分子轨道 (LUMO) 能量水平的变化.
- 研究了电荷四极时刻及其对分子间静电相互作用和GSCG的影响.
主要成果:
- BTA3-16F的LUMO能量水平与BTA3相似,导致了高开路电压 (V_OC).
- 在BTA3-16F中,完全化产生了很大的电荷四极矩,促进了强大的静电相互作用和高效的GSCG.
- PTQ10/BTA3-16F实现了1.302V的V_OC和11.14%的功率转换效率,这是一个世界纪录.
- 三级OSC (PM6/L8-BO/BTA3-16F) 的PCE达到了19.82%,显示出BTA3-16F是一个有效的客分子.
结论:
- 在有机太阳能电池中通过替代调节分子四极运动是增强GSCG的有效策略.
- 有效的GSCG显著影响激素解离,重组和电荷传输,从而提高设备的性能.
- 这项研究强调了分子间相互作用在确定OSC效率方面的关键作用,并为设计先进的受体材料提供了途径.
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