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High performance PbS quantum dot/graphene hybrid solar cell with efficient charge extraction

机译:具有高效电荷提取的高性能PbS量子点/石墨烯混合太阳能电池

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摘要

Hybrid colloidal quantum dot (CQD) solar cells are fabricated from multilayer stacks of lead sulfide (PbS) CQD and single layer graphene (SG). The inclusion of graphene interlayers is shown to increase power conversion efficiency by 9.18%. It is shown that the inclusion of conductive graphene enhances charge extraction in devices. Photoluminescence shows that graphene quenches emission from the quantum dot suggesting spontaneous charge transfer to graphene. CQD photodetectors exhibit increased photoresponse and improved transport properties. We propose that the CQD/SG hybrid structure is a route to make CQD thin films with improved charge extraction, therefore resulting in improved solar cell efficiency.
机译:混合胶体量子点(CQD)太阳能电池由硫化铅(PbS)CQD和单层石墨烯(SG)的多层堆叠制成。石墨烯中间层的加入显示出将功率转换效率提高了9.18%。结果表明,包含导电石墨烯可增强器件中的电荷提取。光致发光表明,石墨烯淬灭了来自量子点的发射,表明自发电荷转移至石墨烯。 CQD光电探测器表现出增强的光响应和改善的传输性能。我们建议CQD / SG混合结构是制造具有改善电荷提取能力的CQD薄膜的途径,因此可以提高太阳能电池的效率。

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