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

Fingerprint

Nanocrystals
Semiconductor quantum dots
nanocrystals
quantum dots
Semiconductor materials
Photoconducting devices
Solar cells
solar cells
Metals
Ligands
Photoconducting materials
ligands
photoconductors
Open circuit voltage
optoelectronic devices
Surface chemistry
open circuit voltage
Sun
Optoelectronic devices
metals

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)

Functionalized semiconductor nanocrystal quantum dots for patterned, multilayered photovoltaic devices. / Kim, Sung Jin; Kim, Won Jin; Seo, Jangwon; Cartwright, Alexander N.; Prasad, Paras N.

Materials Research Society Symposium Proceedings. Vol. 1121 2009. p. 66-71.

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

Kim, SJ, Kim, WJ, Seo, J, Cartwright, AN & Prasad, PN 2009, Functionalized semiconductor nanocrystal quantum dots for patterned, multilayered photovoltaic devices. in Materials Research Society Symposium Proceedings. vol. 1121, pp. 66-71, 2009 MRS Fall Meeting, Boston, MA, United States, 11/30/09.
Kim SJ, Kim WJ, Seo J, Cartwright AN, Prasad PN. Functionalized semiconductor nanocrystal quantum dots for patterned, multilayered photovoltaic devices. In Materials Research Society Symposium Proceedings. Vol. 1121. 2009. p. 66-71
Kim, Sung Jin ; Kim, Won Jin ; Seo, Jangwon ; Cartwright, Alexander N. ; Prasad, Paras N. / Functionalized semiconductor nanocrystal quantum dots for patterned, multilayered photovoltaic devices. Materials Research Society Symposium Proceedings. Vol. 1121 2009. pp. 66-71
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