Efficient optical absorption enhancement in organic solar cells by using a 2-dimensional periodic light trapping structure

2014 ◽  
Vol 104 (24) ◽  
pp. 243904 ◽  
Author(s):  
Feng-Shuo Zu ◽  
Xiao-Bo Shi ◽  
Jian Liang ◽  
Mei-Feng Xu ◽  
Chun-Sing Lee ◽  
...  
Keyword(s):  
Solar Cells ◽  
Optical Absorption ◽  
Organic Solar Cells ◽  
Light Trapping ◽  
Absorption Enhancement

Exfoliated ∼25μm Si Foil for Solar Cells with Improved Light-Trapping

2013 ◽  
Vol 1493 ◽  
pp. 51-58 ◽  
Author(s):  
S. Saha ◽  
E. U. Onyegam ◽  
D. Sarkar ◽  
M. M. Hilali ◽  
R. A. Rao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Optical Absorption ◽  
Amorphous Silicon ◽  
Current Density ◽  
Surface Passivation ◽  
Light Trapping ◽  
Rear Surface ◽  
Front Surface ◽  
Absorption Enhancement ◽  
Back Surface

ABSTRACTInvestigation of optical absorption in ∼25μm thick, monocrystalline silicon (Si) substrates obtained from a novel exfoliation technique is done by fabricating solar cells with single heterojunction architecture (without using intrinsic amorphous silicon layer) with diffused back junction and local back contact. The ease of process flow and the rugged and flexible nature of the substrates due to thick metal backing enables use of various light-trapping and optical absorption enhancement schemes traditionally practiced in the industry for thicker (>120μm) substrates. Optical measurement of solar cells using antireflective coating, texturing on both surfaces, and back surface dielectric/metal stack as mirror to reflect the long wavelength light from the back surface show a very low front surface reflectance of 4.6% in the broadband spectrum (300nm-1200nm). The illuminated current voltage (IV) and external quantum efficiency (EQE) measurement of such solar cell shows a high integrated current density of 34.4mA/cm2, which implies significant internal photon reflection. Our best cell with intrinsic amorphous silicon (i-a-Si) layer with only rear surface textured shows an efficiency of 14.9%. EQE data shows improved blue response and current density due to better front surface passivation. Simulations suggest that with optimized light trapping and surface passivation, such thin c-Si cells can reach efficiencies >20%.

scholarly journals Highly efficient organic solar cells enabled by a porous ZnO/PEIE electron transport layer with enhanced light trapping

2020 ◽  
Vol 64 (4) ◽  
pp. 808-819
Author(s):  
Shenya Qu ◽  
Jiangsheng Yu ◽  
Jinru Cao ◽  
Xin Liu ◽  
Hongtao Wang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Organic Solar Cells ◽  
Light Trapping ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Highly Efficient

Absorption enhancement of oligothiophene dyes through the use of a cyanopyridone acceptor group in solution-processed organic solar cells

2012 ◽  
Vol 48 (13) ◽  
pp. 1889 ◽  
Author(s):  
Akhil Gupta ◽  
Abdelselam Ali ◽  
Ante Bilic ◽  
Mei Gao ◽  
Katalin Hegedus ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Absorption Enhancement ◽  
Solution Processed ◽  
Acceptor Group

scholarly journals Effects of Ag Nanocubes with Different Corner Shape on the Absorption Enhancement in Organic Solar Cells

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Feng Shan ◽  
Tong Zhang ◽  
Sheng-Qing Zhu
Keyword(s):  
Solar Cells ◽  
Active Layer ◽  
Organic Solar Cells ◽  
Field Enhancement ◽  
Localized Surface Plasmon ◽  
Absorption Enhancement ◽  
Absorption Performance ◽  
Different Shapes ◽  
Ag Ncs ◽  
Metallic Region

The effects of corner shape of silver (Ag) nanocubes (NCs) on optical absorptions of organic solar cells (OSCs) are theoretically investigated by finite element method (FEM) calculations. The absorption of sun light in the active layer is calculated. Significant absorption enhancements have been demonstrated in metallic region with different shapes of Ag NCs, among them corner radius (R) is zero result in the best light absorption performance of up to 55% enhancement with respect to bare OSCs. The origins of increased absorption are believed to be the effects of the huge electric field enhancement and increased scattering upon the excitation of localized surface plasmon resonance (LSPR). Apart from usingR=0, we show thatR=3, 6, and 11.29 of Ag NCs in metallic region of active layer may also result in the maximum comparable absorption enhancement of 49%, 41%, and 28%, respectively. In addition, a significant effect of the period of NCs is observed.

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