Different doping positions of Au nanorods impact on organic solar cells performance
- PDF / 2,366,414 Bytes
- 8 Pages / 595.276 x 790.866 pts Page_size
- 72 Downloads / 192 Views
Different doping positions of Au nanorods impact on organic solar cells performance Simin Yu1,2 · Qiao Zheng1,2 · Shuying Cheng1,2 · Yunfeng Lai1 · Haifang Zhou1 · Jinling Yu1 Received: 6 January 2018 / Accepted: 18 April 2018 © Springer Science+Business Media, LLC, part of Springer Nature 2018
Abstract The doping positions of Au nanorods (Au NRs) impact on the organic solar cells (OSCs) performance was studied systematically. Although doping Au NRs into the hole transport layer (HTL) or the interface of the active layer/HTL could improve the performance of OSCs, the device with Au NRs at the interface shows more improvement with a short-circuit current density of 11.36 mA/cm2 and power conversion efficiency of 3.22%. The better performance is owing to the higher light absorption increased nearly 30% for the device with Au NRs at the interface than that of the devices with Au NRs in HTL.
1 Introduction Organic solar cells (OSCs) have attracted much attention with light-weight, low-cost, mechanical flexibility and rollto-roll process as its advantages. But unfortunately, to the best of our knowledge, the thickness of the photoactive layer is limited to 100–200 nm because of low carrier mobility of the organic/polymer materials (on the order of 10 cm2/V s) [1, 2]. As a result, the thin absorption layer can not sufficiently absorb solar energy, leading to a poor light absorption and low power conversion efficiency. In our previous work, organic solar cells based on the P3HT:PCBM active layer achieved only power conversion efficiency of 1.45%. The optimized thickness of the active layer is 100 nm which is consistent with the optimized active layer thickness in other literatures [3]. In recent years, light trapping approaches [4] (e.g., antireflection coatings, substrate geometry-induced trapping) have been employed in OSCs to significantly improve light harvesting of the device. Among the light trapping approaches, * Qiao Zheng [email protected] * Shuying Cheng [email protected] 1
School of Physics and Information Engineering and Institute of Micro‑Nano Devices & Solar Cells, Fuzhou University, Fuzhou 350116, People’s Republic of China
Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou 213164, Jiangsu, People’s Republic of China
2
employing the metal nanostructure in the organic thin film photovoltaic devices is a promising method for boosting power conversion efficiency [5, 6]. Both periodic metal nanoarrays and noble metal nanoparticles (e.g., Au [7], Ag [8], Cu [9, 10], Pt, Ni [11]) can improve light absorption via enhancing local field and scattering incident light. The latter have simpler fabrication and tunable optical resonance features. Local surface plasmonic resonance effect intensifies the electromagnetic field around metal nanoparticles (NPs) surface. It’s worth noting that the morphology, size, materials and the surrounding dielectric environment of the metallic NPs play very important role in local surface plasmonic resonance effect [12, 13]. Additionall
Data Loading...
