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Volume 5 Journal of Environmental Analytical Chemistry Green Chemistry Congress 2018
July 19-20, 2018
July 19-20, 2018 Melbourne, Australia
5th World Congress on
Green Chemistry and Green Engineering
Si solar cells with higher efficiency for picking up photons in ultraviolet and infrared region of solar spectra
Wei-Qi Huang1 and Zhong-Mei Huang2
1Guizhou University, China
2Fudan University, China
S urface-induced effects on micro nano-pattern and quantum confinement effect in Si nanostructures offer interesting
features that could be used to boost the efficiency of photovoltaic energy conversion and to overcome some of the restraints
that lead to the Shockley–Queisser limit. Micro nano-structuring has been suggested as a promising method to find a new
path to get an effective absorber for solar cells with higher efficiency in a photovoltaic system. Recently, significant effort has
been focused on enhancing the light absorption by nano-scale light trapping using nanowires, nano-cones, nano-domes and
nano-holes. Despite the exciting success in light trapping, the power conversion efficiency of nano-structured Si solar cells,
however, remain lower efficiency for the thick devices and the thin devices. The Si solar cells with nanostructures are not
efficient because of severe Auger recombination. In addition it is also needed for Si solar cells with higher efficiency to pick
up photons in ultraviolet and infrared region of solar spectra. Here, we have found the new methods in which the localized
electronic states with longer lifetime due to the Heisenberg principle related to ⊿t~h/⊿E are built from the impurities on the
nanostructures for avoiding severe Auger recombination, which involve the electronic states due to impurities built on the
smaller nanostructures doped with oxygen and the electronic states owing to impurities built on the defects doped with oxygen
for improving photovoltaic conversion in ultraviolet and infrared regions.
Biography
Wei-Qi Huang is the Professor and Director of the Center for Green Chemistry at UMass Boston. He was Winner of 2015 International Fluorous Technology Award.
Wei-Qi Huang et al., J Environ Anal Chem 2018, Volume 5
DOI: 10.4172/2380-2391-C1-002