An oleic acid-capped CdSe quantum-dot sensitized solar cell

In this letter, we report an oleic acid (OA)-capped CdSe quantum-dot sensitized solar cell (QDSSC) with an improved performance. The TiO2/OA-CdSe photoanode in a two-electrode device exhibited a photon-to-current conversion efficiency of 17.5% at 400 nm. At AM1.5G irradiation with 100 mW/cm2 light intensity, the QDSSCs based on OA-capped CdSe showed a power conversion efficiency of about 1%. The function of OA was to increase QD loading, extend the absorption range and possibly suppress the surface recombination.

[1]  Yuh‐Lang Lee,et al.  Chemical bath deposition of CdS quantum dots onto mesoscopic TiO2 films for application in quantum-dot-sensitized solar cells , 2007 .

[2]  P. Mulvaney,et al.  Nucleation and growth kinetics of CdSe nanocrystals in octadecene , 2004 .

[3]  Yu Yang,et al.  Quantum-dot-sensitized solar cells: Assembly of CdS-quantum-dots coupling techniques of self-assembled monolayer and chemical bath deposition , 2007 .

[4]  R. Schaller,et al.  High efficiency carrier multiplication in PbSe nanocrystals: implications for solar energy conversion. , 2004, Physical review letters.

[5]  Xiaogang Peng,et al.  Experimental Determination of the Extinction Coefficient of CdTe, CdSe, and CdS Nanocrystals , 2003 .

[6]  Junya Kobayashi,et al.  Effect of ZnS coating on the photovoltaic properties of CdSe quantum dot-sensitized solar cells , 2008 .

[7]  H. Cho,et al.  HYDROGENATION EFFECTS ON N+-P INP SOLAR CELL , 1994 .

[8]  Yuh‐Lang Lee,et al.  Highly Efficient CdSe-Sensitized TiO2 Photoelectrode for Quantum-Dot-Sensitized Solar Cell Applications , 2008 .

[9]  G. Hodes,et al.  Charge overlap interaction in quantum dot films: time dependence and suppression by cyanide adsorption. , 2005, The journal of physical chemistry. B.

[10]  H. Pettersson,et al.  Dye-sensitized solar cells. , 2010, Chemical Reviews.

[11]  M. Beard,et al.  Highly efficient multiple exciton generation in colloidal PbSe and PbS quantum dots. , 2005, Nano letters.

[12]  Kai Zhu,et al.  Nanocrystalline TiO2 solar cells sensitized with InAs quantum dots. , 2006, The journal of physical chemistry. B.

[13]  Xiaogang Peng,et al.  Formation of high-quality CdTe, CdSe, and CdS nanocrystals using CdO as precursor. , 2001, Journal of the American Chemical Society.

[14]  Vaidyanathan Subramanian,et al.  Quantum dot solar cells. harvesting light energy with CdSe nanocrystals molecularly linked to mesoscopic TiO2 films. , 2006, Journal of the American Chemical Society.

[15]  Li Bin,et al.  Improved Performance of Solid-State Grätzel Solar Cell by Cosensitization of Quantum Dot and Dye , 2004 .

[16]  Guido Viscardi,et al.  Combined experimental and DFT-TDDFT computational study of photoelectrochemical cell ruthenium sensitizers. , 2005, Journal of the American Chemical Society.

[17]  Guo-Qiang Lo,et al.  Improved dye-sensitized solar cells with a ZnO-nanoflower photoanode , 2007 .

[18]  Ralph G. Pearson,et al.  HARD AND SOFT ACIDS AND BASES , 1963 .

[19]  Jun-Ho Yum,et al.  CdSe Quantum Dot-Sensitized Solar Cells Exceeding Efficiency 1% at Full-Sun Intensity , 2008 .

[20]  A. Nozik.  Multiple exciton generation in semiconductor quantum dots , 2008 .