Open AccessEnhancement of the power conversion efficiency by expanding the absorption spectrum with fluorescence layers
Author(s) -
Fei Wang,
Zhijian Chen,
Lijun Xiao,
Bo Qü,
Qihuang Gong
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.00a361
Subject(s) - materials science , fluorescence , visible spectrum , optics , ultraviolet , optoelectronics , absorption (acoustics) , layer (electronics) , absorption spectroscopy , infrared , energy conversion efficiency , photochemistry , chemistry , nanotechnology , physics
The spectral response of Poly(3-hexylthiophene) (P3HT): 1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6)C61 (PCBM) heterojunction film is between 350 nm and 650 nm, meaning that a lot of the sunlight is lost at ultraviolet and infrared regions. We fabricated solar cells by the attachment of a fluorescence layer which absorbs UV light, and emit visible light which will be re-used by P3HT, and thus the absorption spectrum is expanded. Since N,N'-bis(3-methylphenyl)-N,N'-bis(phenyl)-benzidine (TPD) has high reflectance in the visible range, the usage of UV light will not manifest; when LiF is added as an antireflection layer, PCE was enhanced from 2.50% to 2.68%.