Accession Number ADA566263
Title DNA Based Electrochromic and Photovoltaic Cells.
Publication Date 2012
Media Count 30p
Personal Author A. J. Pawlicka
Abstract DNA is an abundant natural product with very good biodegradation properties and can be used to obtain gel polymer electrolytes (GPEs) with high ionic conductivity and good stability. This report presents results of developed GPE membranes based on DNA. The ionic conductivity results of the DNA- based membranes at room temperature were in the range of 10-3-10-5 S/cm and increased linearly as a function of temperature, obeying predominantly an Arrhenius relationship. The transmittance results in the UV-Vis region revealed transparency of 85-95%. Membranes of DNA with PEDOT, POEA and PB as well as DNA- CTMA and DNA-DODA were also obtained and characterized. High ionic conductivity results combined with transparency and adhesion to the electrodes showed that DNA-based GPEs are very promising materials to be used as solid electrolytes in electrochemical devices. To verify this applicability the membranes were used to obtain small electrochromic devices (ECDs), which were characterized by cyclic voltammetry, charge density and spectroscopic measurements. The obtained results showed a change of color from transparent to blue after potential application. Moreover the DNA was applied in small solar cells giving the conversion efficiency of 2.44%, higher when compared with the similar solar cells without DNA.
Keywords Arrhenius equation
Biodegradation
Brazil
Cells
Charge density
Chromizing
Colors
Conductivity
Conversion
Cycles
Deoxyribonucleic acids
Display systems
Efficiency
Electrodeposition
Electrodes
Electrolytes
Foreign reports
Gels
High rate
Ions
Materials
Measurement
Membranes
Passive systems
Photovoltaic effect
Polymers
Reports
Solar cells
Solid electrolytes
Spectroscopy
Stability
Temperature
Transmittance
Transparence
Transparencies
Voltammetry


 
Source Agency Non Paid ADAS
NTIS Subject Category 57B - Biochemistry
49E - Optoelectronic Devices & Systems
Corporate Author Sao Paulo Univ. (Brazil). Dept. of Physics.
Document Type Technical report
Title Note Final rept. 1 Sep 2009-30 Nov 2011.
NTIS Issue Number 1306
Contract Number FA9550-09-1-0647

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