ZnO nanoparticle based highly efficient CdS/CdSe quantum dot-sensitized solar cells

Abstract

20 nm ZnO nanoparticles are used to fabricate the mesoporous photoanode of the CdS/CdSe quantum dot-sensitized solar cells by the simple doctor blade method. A maximum power conversion efficiency of 4.46% has been achieved, which indicated exciting prospects for ZnO nanoparticle based quantum dot-sensitized solar cells.

Quantum dot sensitized solar cell: Recent advances and future perspectives in photoanode

“…terpineol) and solvent (e.g. ethanol) [46]. The prepared paste is dropped on selected area of conducting surface of substrate which is usually selected through either scotch tape or mask.…”

Raman and photoluminescence investigation of CdS/CdSe quantum dots on TiO2 nanoparticles with multi-walled carbon nanotubes and their application in solar cells

“…Cascade QDs have been used to increase the power conversion efficiency (PCE) of QDSSCs, using materials such as CdS/CdTe, CdS/CdSe, ZnSe/CdSe, and ZnSe/CdSe/ZnSe [4,[8][9][10]. TiO 2 nanoparticles [11,12] and ZnO nanostructures [1,2,4] have been widely used as photoanodes. The highest PCE of a QD-SSC is about 6.2% [4], but this is still far lower than the theoretical maximum PCE based on hot-(cold-) electron injection, which is about 43% (32%) [13,14].…”

“…Quantum dots have been widely used in solar cells to absorb the sunlight for photocurrent generation [1][2][3][4]. Time-resolved second harmonic spectroscopy has been used to demonstrate the efficient hot-electron injection from PbSe nanocrystals to TiO 2 nanoparticles [5].…”

Utilizing vertically aligned CdSe/CdS nanorods within a luminescent solar concentrator

“…10 Previously, CdSe based nano-structures have been considered for use in solar cells and other types of optoelectronics, for example, CdSe/CdTe quantum well superlattices 11,12 and quantum dot sensitization. 13,14 This paper details experimental and theoretical results for a sample consisting of a 25 mm  12.5 mm  1 mm glass substrate, with a CdSe/CdS nanorod thin-film. This sample was prepared using the self-alignment technique described in the work of Zanella et al 10 In which, a highly concentrated solution of CdSe/CdS nanorods and xylene was evaporated onto the top surface of a glass substrate.…”