scholarly journals High-Efficiency Amorphous Silicon Solar Cell on a Periodic Nanocone Back Reflector

2012 ◽  
Vol 2 (6) ◽  
pp. 628-633 ◽  
Author(s):  
Ching-Mei Hsu ◽  
Corsin Battaglia ◽  
Celine Pahud ◽  
Zhichao Ruan ◽  
Franz-Josef Haug ◽  
...  
Keyword(s):  
Solar Cell ◽  
Amorphous Silicon ◽  
Silicon Solar Cell ◽  
High Efficiency ◽  
Amorphous Silicon Solar Cell ◽  
Back Reflector

scholarly journals Photochemical Upconversion Enhanced Solar Cells: Effect of a Back Reflector

2012 ◽  
Vol 65 (5) ◽  
pp. 480 ◽  
Author(s):  
Tim F. Schulze ◽  
Yuen Yap Cheng ◽  
Burkhard Fückel ◽  
Rowan W. MacQueen ◽  
Andrew Danos ◽  
...  
Keyword(s):  
Solar Cell ◽  
Amorphous Silicon ◽  
Figure Of Merit ◽  
Silicon Solar Cell ◽  
Hydrogenated Amorphous Silicon ◽  
Scattering Layer ◽  
Amorphous Silicon Solar Cell ◽  
Back Scattering ◽  
Back Reflector ◽  
Hydrogenated Amorphous

Photochemical upconversion is applied to a hydrogenated amorphous silicon solar cell in the presence of a back-scattering layer. A custom-synthesized porphyrin was utilized as the sensitizer species, with rubrene as the emitter. Under a bias of 24 suns, a peak external quantum efficiency (EQE) enhancement of ~2 % was observed at a wavelength of 720 nm. Without the scattering layer, the EQE enhancement was half this value, indicating that the effect of the back-scatterer is to double the efficacy of the upconverting device. The results represent an upconversion figure of merit of 3.5 × 10–4 mA cm–2 sun–2, which is the highest reported to date.

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