Performances Enhancement in Perovskite Solar Cells by Incorporating Plasmonic Au NRs@SiO2 at Absorber/HTL Interface. Issue 12 (6th November 2017)

• Record Type: Journal Article
• Authors: Zhang, Xiaoman; Liu, Jialei; Kou, Dongxing; Zhou, Wenhui; Zhou, Zhengji; Tian, Qingwen; Meng, Yuena; Wu, Sixin; Cao, Aocheng; Ouyang, Canbin
• Is Part Of: Solar RRL. Volume 1:Issue 12(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-11-06
• Subjects: Au nanorods -- charge separation -- light absorption -- passivation -- perovskite solar cells; Solar energy -- Periodicals; Photovoltaic power generation -- Periodicals; Solar energy -- Research -- Periodicals; Photovoltaic power generation -- Research -- Periodicals; Periodicals; 333.7923
• DOI: 10.1002/solr.201700151
• Languages: English
• ISSNs: 2367-198X

Abstract

Abstract : Metallic nanoparticles (NPs) exhibit a surface plasmon resonance (SPR) and can be incorporated into perovskite solar cells (PSCs) to improve cell performance. However, the incorporation of Au NPs in bulk films of PSCs requires large concentration to keep interval distance and would cause worse device performance. In this work, a universal strategy for significant increasing power conversion efficiency (PCE) of PSCs through incorporating high aspect ratio Au nanorods (NRs)@SiO2 into perovskite/spiro‐OMeTAD interface is demonstrated. The key feature of this approach is that we can take advantage of the SPR at a lower concentration and the Au NRs have larger light scattering section than AuNPs. It is found that the SPR and scattering effect of Au NRs lead to a broad enhancement of photon absorption. Furthermore, a superior enhanced charge separation process in the Au NRs incorporated device is also observed. Benefitting from this cooperative plasmonic effect of Au NRs in optical and electrical aspects, both short‐circuit current density and open‐circuit voltage are improved, resulting in the new device delivering a PCE up to 17.39% from 14.39%. This result further supports that Au NRs can play a more effective SPR effect at perovskite/spiro‐OMeTAD interface, rather than incorporating them into bulk films. Abstract : A universal strategy for a significant increase in power conversion efficiency of perovskite solar cells through the incorporation of high aspect ratio Au nanorods@SiO2 into perovskite/spiro‐OMeTAD interface is demonstrated. The plasmonic and scattering effects of Au NRs lead to a broad enhancement of photon absorption and a superior improvement of charge separation. This cooperative plasmonic effect in optical and electrical aspects finally delivers the cell efficiency up to 17.39% from 14.39%.