Synthesis, colloidal crystallization and solar cell application of monodisperse ZnO quantum dots Conference Paper uri icon

abstract

  • ZnO quantum dots (QDs) with a nearly uniform particle size of 5 nm have been synthesized, purified and dispersed in organic solvent. Colloidal crystal of monodisperse ZnO QDs, which is transparent to visible light and blocks UV-light as bulk material, has been prepared via interparticle potential tuning without using surfactants as a stabilizer. Mesoporous thin film of ZnO QDs has also been fabricated as a seed layer for hydrothermal growth of ZnO nanorod arrays, of which the interstitial space can be efficiently filled by dispersed ZnO QDs. For solar cell application, ZnO nanoparticles were conjugated with dye molecules (Ruthenium 535-bisTBA) to enhance light absorption and a p-type semiconducting polymer film was deposited on the top of the nanorod arrays to replenish lost electrons in dye molecules. Compared with the device using ZnO nanorods alone, the efficiency of the hybrid structure of ZnO nanorods and QDs has been significantly improved.

author list (cited authors)

  • Sue, H., Zhang, X. i., Lee, T., Sun, D., & Cheng, X.

publication date

  • March 2011