Enhancement of optical absorption in thin-film solar cells through the excitation of higher-order nanoparticle plasmon modes. Opt Express

Advanced Photonics and Plasmonics Group, Institute of High Performance Computing, Singapore.
Optics Express (Impact Factor: 3.49). 07/2009; 17(12):10195-205. DOI: 10.1364/OE.17.010195
Source: PubMed

ABSTRACT Recent research in the rapidly emerging field of plasmonics has shown the potential to significantly enhance light trapping inside thin-film solar cells by using metallic nanoparticles. In this article it is demonstrated the plasmon enhancement of optical absorption in amorphous silicon solar cells by using silver nanoparticles. Based on the analysis of the higher-order surface plasmon modes, it is shown how spectral positions of the surface plasmons affect the plasmonic enhancement of thin-film solar cells. By using the predictive 3D modeling, we investigate the effect of the higher-order modes on that enhancement. Finally, we suggest how to maximize the light trapping and optical absorption in the thin-film cell by optimizing the nanoparticle array parameters, which in turn can be used to fine tune the corresponding surface plasmon modes.

Download full-text


Available from: Wee Shing Koh, Aug 26, 2015
  • Source
    • "Wu et al. [21] proposed a MTMbased integrated plasmonic absorber/emitter for solar thermophotovoltaic systems. Akimov et al. [22] studied enhancement of optical absorption in thin-film solar cells through the excitation of higher-order nanoparticle Plasmon modes. Hashmi et al. [3] developed a theoretical model for MTM based solar cells, while, Liu et al. [23], also made a study of energy absorption on solar cells by using a MTM absorber. "
    [Show abstract] [Hide abstract]
    ABSTRACT: The efficiency of solar photovoltaic (PV) cells has been one of the major problems impeding its global adoption as one of the sustainable substitutes to fossil fuel based technologies. Metamaterial (MTM) based solar cells offer an opportunity towards increasing the system efficiency by enhancing the total absorbed solar radiation incident on this device. In this study, a nanostructure-based MTM perfect absorber has been designed and simulated. By adjusting geometrical parameters and MTM structure properties, nearly perfect dual-band absorptions have been obtained with 99.99% and 99.90% absorption at 543.75 THz and 663.75 THz, respectively. The proposed structure is simple and more flexible for scaling, which helps achievement of multiple-band absorption. Implementation of the intended MTM structure can effectively lead to the realization of more efficient PV solar cells.
  • Source
    • "But if the immersion time is too long, the efficiency of the device decreases, although the increasing absorbs of light increases (Figure 5b). Larger particles along with larger surface coverage lead to increased parasitic absorption and reflection, reducing the desired optical absorption in SCNT film layer [48]. In addition, the particles embedded between SCNT and Si substrate will reduce the density of p-n junction and lead to a significantly decrease shunt resistance; therefore, the JSC and PCE decrease. "
    [Show abstract] [Hide abstract]
    ABSTRACT: The power conversion efficiency (PCE) of single-wall carbon nanotube (SCNT)/n-type crystalline silicon heterojunction photovoltaic devices is significantly improved by Au doping. It is found that the overall PCE was significantly increased to threefold. The efficiency enhancement of photovoltaic devices is mainly the improved electrical conductivity of SCNT by increasing the carrier concentration and the enhancing the absorbance of active layers by Au nanoparticles. The Au doping can lead to an increase of the open circuit voltage through adjusting the Fermi level of SCNT and then enhancing the built-in potential in the SCNT/n-Si junction. This fabrication is easy, cost-effective, and easily scaled up, which demonstrates that such Au-doped SCNT/Si cells possess promising potential in energy harvesting application.
    Nanoscale Research Letters 05/2013; 8(1):225. DOI:10.1186/1556-276X-8-225 · 2.52 Impact Factor
  • Source
    • "Similar results were reported for Ag-NPs, deposited by thermal evaporation followed by annealing, on polished silicon with a 30 nm oxide layer, being a strong absorption observed for wavelengths above 1000 nm. There, it is shown the increase of absorption with increasing particle diameter1. Akimov et al.9 has also shown an enhancement of light absorption up to 59% when Al-NPs were deposited on the top of the TCO layer of a-Si:H solar cells. Nevertheless, our Au-NPs are embedded in a-Si:H film and the prove is the coincidence of TT and TSp spectra obtained by irradiating the samples from the glass side or from a-Si:H film side (reflectance was not shown also because no difference was observed). "
    [Show abstract] [Hide abstract]
    ABSTRACT: Metallic nanoparticles (NPs) have received recently considerable interest of photonic and photovoltaic communities. In this work, we report the optoelectronic properties of gold NPs (Au-NPs) obtained by depositing very thin gold layers on glass substrates through thermal evaporation electron-beam assisted process. The effect of mass thickness of the layer was evaluated. The polycrystalline Au-NPs, with grain sizes of 14 and 19 nm tend to be elongated in one direction as the mass thickness increase. A 2 nm layer deposited at 250°C led to the formation of Au-NPs with 10-20 nm average size, obtained by SEM images, while for a 5 nm layer the wide size elongates from 25 to 150 nm with a mean at 75 nm. In the near infrared region was observed an absorption enhancement of amorphous silicon films deposited onto the Au-NPs layers with a corresponding increase in the PL peak for the same wavelength region.
    Scientific Reports 04/2013; 3:1469. DOI:10.1038/srep01469 · 5.58 Impact Factor
Show more