Enhancement of efficiency in graphene/porous silicon solar cells by co-doping graphene with gold nanoparticles and bis(trifluoromethanesulfonyl)-amide,Journal of Materials Chemistry C

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Enhancement of efficiency in graphene/porous silicon solar cells by co-doping graphene with gold nanoparticles and bis(trifluoromethanesulfonyl)-amide
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2017-08-10 00:00:00 , DOI: 10.1039/c7tc02686b
Ju Hwan Kim _{1,

2,

3} , Dong Hee Shin _{1,

2,

3} , Ha Seung Lee _{1,

2,

3} , Chan Wook Jang _{1,

2,

3} , Jong Min Kim _{1,

2,

3} , Sang Woo Seo _{1,

2,

3} , Sung Kim _{1,

2,

3} , Suk-Ho Choi _{1,

2,

3}

Affiliation

Porous silicon (PSi) is an attractive building block for photonic devices, such as solar cells and photodetectors, due to its high surface to volume ratio, low reflection and high optical gain. In this work, PSi is prepared based on metal-assisted chemical etching by varying the deposition time (t_d) of Ag or Au nanoparticles (NPs) for the etching of Si from 1 to 7 s, thereby controlling the porosity of PSi. The co-doping of graphene with Au NPs and bis(trifluoromethanesulfonyl)-amide [(CF₃SO₂)₂NH] is employed for the first time to enhance the performance of graphene/PSi Schottky-junction solar cells. Co-doping is proven to be very effective for increasing the work function of graphene as well as its electrical conductivity, resulting in efficient separation and collection of photo-induced electron–hole pairs in solar cells. The co-doped graphene/PSi solar cells show a maximum power conversion efficiency (PCE) of 10.69% at t_d = 5 s, and lose only 5% of the original PCE value after 15 days in air. These results provide a new route for fabricating highly efficient and stable graphene/PSi junction solar cells.

中文翻译：

通过与金纳米颗粒和双（三氟甲磺酰基）-酰胺共掺杂石墨烯来提高石墨烯/多孔硅太阳能电池的效率

多孔硅（PSi）具有高的表面体积比，低反射率和高光学增益，因此是光子器件（例如太阳能电池和光电探测器）有吸引力的构建基块。在这项工作中，通过在1到7 s之间改变用于蚀刻Si的Ag或Au纳米颗粒（NPs）的沉积时间（t _d），从而基于金属辅助化学蚀刻来制备PSi ，从而控制PSi的孔隙率。石墨烯与Au NPs和双（三氟甲磺酰基）-酰胺[（CF ₃ SO ₂）₂的共掺杂首次使用NH]来增强石墨烯/ PSi肖特基结太阳能电池的性能。事实证明，共掺杂对于提高石墨烯的功函及其导电性非常有效，从而可以有效地分离和收集太阳能电池中的光生电子-空穴对。共掺杂的石墨烯/ PSi太阳能电池在t _d = 5 s时显示出最大功率转换效率（PCE）为10.69％，并且在空气中放置15天后仅损失了原始PCE值的5％。这些结果为制造高效且稳定的石墨烯/ PSi结太阳能电池提供了一条新途径。

更新日期：2017-09-14

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