Functionalized semiconductor nanocrystal quantum dots for patterned, multilayered photovoltaic devices

Sung Jin Kim, Won Jin Kim, Jangwon Seo, Alexander N. Cartwright, Paras N. Prasad

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We report an approach for nanostructured photovoltaic devices using functionalized semiconductor nanocrystal quantum dots (NQDs) by incorporation of the functional ligand t-butoxycarbonyl (t-BOC) which has an acid-labile moiety. This change in the surface chemistry results in the ability to photo-pattern the NQDs, where desired, for a number of optoelectronic device geometries with sub-micron patterning capability. This also enables the fabrication of multi-layered nanostructure photovoltaic devices. We demonstrate an improved photoconducting device, using the patterning and ligand modification process, as well as a bi-layered solar cell using CdTe and CdSe NQDs. The photoconductor has the metal semiconductor metal structure and it shows at least 3 times higher conductivity and photo-response at an electric field of 300kV/cm when using the t-BOC modified QDs. Moreover, the functionalized NQDs enable all solution processed multilayered and patterned structures without high temperature sintering or additional chemical treatment. By using this method, a bi-layered solar cell was fabricated. The preliminary result shows 0.05% solar conversion efficiency and an open circuit voltage of 0.72V under AM1.5G 1 sun illumination.

Original languageEnglish
Title of host publicationMaterials Research Society Symposium Proceedings
Pages66-71
Number of pages6
Volume1121
StatePublished - Dec 1 2009
Externally publishedYes
Event2009 MRS Fall Meeting - Boston, MA, United States
Duration: Nov 30 2009Dec 4 2009

Other

Other2009 MRS Fall Meeting
CountryUnited States
CityBoston, MA
Period11/30/0912/4/09

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ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Kim, S. J., Kim, W. J., Seo, J., Cartwright, A. N., & Prasad, P. N. (2009). Functionalized semiconductor nanocrystal quantum dots for patterned, multilayered photovoltaic devices. In Materials Research Society Symposium Proceedings (Vol. 1121, pp. 66-71)