Omnidirectional light absorption in thin film silicon solar cell with dual anti-reflection coatings

被引:12
作者
Yang, Wenji [1 ]
Yu, Hongchun [1 ]
Tang, Jianping [2 ,3 ]
Su, Yingbing [2 ]
Wan, Qing [2 ]
Wang, Yanguo [1 ]
机构
[1] Hunan Univ, Coll Phys & Microelect Sci, Micronano Technol Res Ctr, Changsha 410082, Hunan, Peoples R China
[2] Hunan Univ, Minist Educ, Key Lab Micronano Optoelect Devices, Changsha 410082, Hunan, Peoples R China
[3] Hengyang Normal Univ, Dept Phys & Elect Sci, Hengyang 422008, Peoples R China
基金
中国国家自然科学基金;
关键词
Thin film silicon solar cell; Anti-reflection; Light trapping; Omnidirectionality; GENETIC ALGORITHM; OXIDE; GLASS;
D O I
10.1016/j.solener.2011.07.015
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
A theoretical model for an all-in-one thin film silicon solar cell (TFSSC) design with the anti-reflection (AR) coatings, the transparent electrodes, the silicon and the back reflective coatings all deposited on one piece of glass is proposed and the optical performance for the design is numerically simulated. The calculated average reflectance over the wavelength range of 0.4-1.0 mu m and incident angles from 0 degrees to 75 degrees for the optimized dual-AR coatings as a whole is 3.67% - ranking among the lowest values for current AR coatings on silicon solar cells. Furthermore, the spectrum-averaged absorptance (SAA) in the 5-mu m-thick cell in the 0.3-1.2 mu m wavelength range decreases only by 2.58% when the incident angle varies from 0 degrees to 75 degrees, clearly showing the omnidirectional characteristics of the dual-AR coatings. With reasonable assumption of the internal quantum efficiency (near unity), the 5-mu m cell produces a spectrum averaged external quantum efficiency (EQE) of 81.4% at 75 degrees angle of incidence - 6.7% larger than the experiment result of the best planar bulk cell. Under equal sunshine conditions, TFSSCs generally give higher output voltages than their bulk counterpart if equal light absorption is assumed, so the 5-mu m cell has the potential to reach the highest experimental conversion efficiency of the best planar bulk cell. By using a special mathematical technique, we are able to prove the angle-dependent absorption curves in the longer wavelength region tend to converge to a small neighborhood of the upper limit irrespective of significant differences between the transmission profiles. This indicates the AR requirement in the longer wavelength region can be significantly relaxed. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码:2551 / 2559
页数:9
相关论文
共 22 条
  • [1] BORN M, 2003, PRINCIPLES OPTICS, P55
  • [2] Optical characterization of TiO2 thin films by the combined method of spectroscopic ellipsometry and spectroscopic photometry
    Franta, D
    Ohlídal, I
    Petrydes, D
    [J]. VACUUM, 2005, 80 (1-3) : 159 - 162
  • [3] A novel route to a polycrystalline silicon thin-film solar cell
    Fuhs, W
    Gall, S
    Rau, B
    Schmidt, M
    Schneider, J
    [J]. SOLAR ENERGY, 2004, 77 (06) : 961 - 968
  • [4] Polycrystalline silicon thin-film solar cells on glass
    Gall, S.
    Becker, C.
    Conrad, E.
    Dogan, P.
    Fenske, F.
    Gorka, B.
    Lee, K. Y.
    Rau, B.
    Ruske, F.
    Rech, B.
    [J]. SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2009, 93 (6-7) : 1004 - 1008
  • [5] Thin-film monocrystalline-silicon solar cells made by a seed layer approach on glass-ceramic substrates
    Gordon, I.
    Vallon, S.
    Mayolet, A.
    Beaucarne, G.
    Poortmans, J.
    [J]. SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2010, 94 (02) : 381 - 385
  • [6] Optical properties of silicon light trapping structures for photovoltaics
    Iyengar, Vikram V.
    Nayak, Barada K.
    Gupta, Mool C.
    [J]. SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2010, 94 (12) : 2251 - 2257
  • [7] Silicon PV devices based on a single step for doping, anti-reflection and surface passivation
    Iyengar, Vikram V.
    Nayak, Barada K.
    Gupta, Moo C.
    [J]. SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2010, 94 (12) : 2205 - 2211
  • [8] KHAN IH, 1966, CORROS SCI, V6, P483, DOI 10.1016/S0010-938X(66)80055-0
  • [9] Realization of a near-perfect antireflection coating for silicon solar energy utilization
    Kuo, Mei-Ling
    Poxson, David J.
    Kim, Yong Sung
    Mont, Frank W.
    Kim, Long Kyu
    Schuhert, E. Fred
    Lin, Shawn-Yu
    [J]. OPTICS LETTERS, 2008, 33 (21) : 2527 - 2529
  • [10] MACLEOD HA, 1986, FILM OPTICAL FILTERS, P67