Enhanced performance of organic solar cells with multifunctional silica-coated Au nanobowtie core-shell structure
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RESEARCH PAPER
Enhanced performance of organic solar cells with multifunctional silica-coated Au nanobowtie core-shell structure Mengjia Jin & Qiao Zheng & Guochen Ma & Jiaxiong He & Yunfeng Lai & Jinling Yu & Xinghui Wang & Hongjie Jia & Shuying Cheng Received: 6 March 2020 / Accepted: 2 September 2020 # Springer Nature B.V. 2020
Abstract The multifunctional silica-coated Au nanobowtie (GNB@SiO2) core-shell structure was embedded in organic solar cells (OSCs), and an intense performance promotion of the devices was achieved by optimizing the shape and the size of the GNB@SiO2. The light absorption of the active layer was increased with GNB@SiO2 doping concentration increasing until the doping concentration exceeds 10 nM. The devices obtain the best J-V characteristics when GNB@SiO2 doping concentration is 10 nM. Comparing with that of the control cells, the optimal performance of the devices with GNB@SiO2 incorporated was significantly increased by 47%. The finite-difference time-domain method was used to simulate the special asymmetry shape and the size of the multifunctional GNB@SiO2 impact on the performance of the OSCs. The electric field intensity |E|2 in the different planes revealed that the local surface plasmon resonance (LSPR) and farfield scattering effect played an important role in the light absorption of the devices. The cooperation effect of LSPR near-field and the far-field scattering resulted in M. Jin : Q. Zheng : G. Ma : J. He : Y. Lai : J. Yu : X. Wang : H. Jia : S. Cheng College of Physics and Information Engineering, Institute of Micro-Nano Devices & Solar Cells, Fuzhou University, Fuzhou 350108, People’s Republic of China M. Jin : Q. Zheng (*) : S. Cheng (*) Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou, Jiangsu Province 213164, People’s Republic of China e-mail: [email protected] e-mail: [email protected]
the electric field redistribution of the active layer as the result of the absorption enhanced. Keywords Multifunctional GNB@SiO2 particles . Local surface plasmon resonance . Far-field scattering . Boost light absorption . Electric field redistribution . Energy conversion
Introduction In recent years, organic solar cells (OSCs) have attracted much attention owing to the low weight, simple preparation process, flexibility, and potentiality for mass production (Chen et al. 2018; Liu et al. 2018). However, several factors constrain the improvement of power conversion efficiency (PCE) (He et al. 2015). Firstly, the organic polymer material as an active layer hardly maintains the stability in the atmosphere. Secondly, the low carrier mobility of organic semiconductor materials restricts the thickness of the active layer, while the light absorption is directly proportional to the thickness of the active layer (Forrest 2005; Nielsen et al. 2010; Xue 2010). Hence, it is desirable to increase the effective light trapping under the limited thickness of the active layer. The surface plasmon resonance (SPR) effect of the metal nanoparticles (MNPs) has
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