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首页> 外文期刊>Advanced Functional Materials >Boosting Performance of Non-Fullerene Organic Solar Cells by 2D g-C_3N_4 Doped PEDOT:PSS
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Boosting Performance of Non-Fullerene Organic Solar Cells by 2D g-C_3N_4 Doped PEDOT:PSS

机译：二维g-C_3N_4掺杂PEDOT：PSS增强非富勒烯有机太阳能电池的性能

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摘要

The power-conversion efficiency (PCE) of single-junction organic solar cells (OSCs) has exceeded 16% thanks to the development of non-fullerene acceptor materials and morphological optimization of active layer. In addition, interfacial engineering always plays a crucial role in further improving the performance of OSCs based on a well-established active-layer system. Doping of graphitic carbon nitride (g-C3N4) into poly(3,4-ethylene-dioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) as a hole transport layer (HTL) for PM6:Y6-based OSCs is reported, boosting the PCE to almost 16.4%. After being added into the PEDOT:PSS, the g-C3N4 as a Bronsted base can be protonated, weakening the shield effect of insulating PSS on conductive PEDOT, which enables exposures of more PEDOT chains on the surface of PEDOT:PSS core-shell structure, and thus increasing the conductivity. Therefore, at the interface between g-C3N4 doped HTL and PM6:Y6 layer, the charge transport is improved and the charge recombination is suppressed, leading to the increases of fill factor and short-circuit current density of devices. This work demonstrates that doping g-C3N4 into PEDOT:PSS is an efficient strategy to increase the conductivity of HTL, resulting in higher OSC performance.
机译：单结有机太阳能电池（OSC）的功率转换效率（PCE）已超过16％，这要归功于非富勒烯受体材料的开发和活性层的形态优化。此外，基于完善的有源层系统，界面工程始终在进一步提高OSC性能方面起着至关重要的作用。据报道，作为基于PM6：Y6的OSC的空穴传输层（HTL），将石墨碳氮化物（g-C3N4）掺杂到聚（3,4-乙烯-二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT：PSS）中，将PCE提升至近16.4％。添加到PEDOT：PSS中后，可以将质子化的g-C3N4质子化，从而减弱绝缘PSS对导电PEDOT的屏蔽作用，从而使更多的PEDOT链暴露在PEDOT：PSS核-壳结构的表面，从而增加电导率。因此，在掺杂g-C3N4的HTL和PM6：Y6层之间的界面处，改善了电荷传输并抑制了电荷复合，从而导致器件的填充系数和短路电流密度增加。这项工作表明，将g-C3N4掺杂到PEDOT：PSS中是提高HTL电导率的有效策略，从而提高了OSC性能。

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