http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Surana, Karan,Mehra, R.M.,Bhattacharya, B.,Rhee, Hee-Woo,Polu, Anji Reddy,Singh, Pramod K. Elsevier 2015 RENEWABLE & SUSTAINABLE ENERGY REVIEWS Vol.52 No.-
<P><B>Abstract</B></P> <P>In the last two decades quantum dots (QDs) have attracted research interest all across the globe owing to their unique size-dependent optical and electronic properties. Generally, smaller the size of the crystal, the larger is the energy gap and greater is the difference in energy between the highest valence band and the lowest conduction band. Therefore more energy is needed to excite the dot, and concurrently more energy is released when the crystal returns to its resting state. Chalcogenide QDs have gained worldwide acceptance for their application in quantum dot sensitized solar cells (QDSSC). This review article focuses chiefly on the progress made in chalcogenide QD based solar cells (SC) over the years along with a new type of QDSSC giving an output voltage of over 1V.</P>
Synthesis, characterization and application of CdSe quantum dots
Karan Surana,Pramod K. Singh,이희우,B. Bhattacharya 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.6
Contrary to popularly prepared cadmium selenide (CdSe) quantum dots (QDs) at temperatures above200 8C, we here report synthesis of CdSe QDs at room temperature and above using wet-chemicalmethod. Also we have used a much safer binder than the commonly used TOPO/TBPO. Controlling thesize and shape of the nanocrystals allows us to control their bandgap over a wide range and thus, QDs canbe prepared that can absorb and emit light over the entire frequency range of the solar spectrum. Theprepared CdSe QDs were characterized by UV–Vis absorption, PL spectra, XRD and TEM. Particle size wasalso calculated according to the Brus equation. We have fabricated a dye sensitized solar cell using ourCdSe QDs which shows a maximum efficiency of 0.22% at 1 Sun condition.
New polymer electrolyte for electrochemical application
Pramod K. Singh,이희우,Manjeet Singh,Vivek K. Singh,Karan Surana,B. Bhattacharya 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.3
A solid polymer electrolyte consisting of poly vinylpyrrolidone (PVP) and potassium iodide (KI) were developed, characterized for possible application in dye sensitized solar cell (DSSC) as an electrolyte. Complex impedance spectroscopy revealed the enhancement in electrical conductivity (s) by salt doping and a conductivity maximum was obtained at 30 wt% KI concentration. Dielectric phenomena also support the s data. Fourier transform infrared spectroscopy (FTIR) confirmed the composite nature of polymer electrolyte film. Using maximum electrical conductivity film we have fabricated a DSSC which shows 0.14% efficiency at 1 sun condition.