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Applied Physics Letters / Volume 97 / Issue 9 / NANOSCALE SCIENCE AND DESIGN

Appl. Phys. Lett. 97, 093111 (2010); http://dx.doi.org/10.1063/1.3485294 (3 pages)

Photovoltaic nanopillar radial junction diode architecture enhanced by integrating semiconductor quantum dot nanocrystals as light harvesters

Burak Güzeltürk1, Evren Mutlugün1, Xiaodong Wang2, Kin Leong Pey3,2, and Hilmi Volkan Demir1,3

1Department of Physics, Department of Electrical and Electronics Engineering, and UNAM–National Nanotechnology Research Center, Institute of Materials Science and Nanotechnology, Bilkent University, Ankara TR-06800, Turkey
2Advanced Materials for Micro- and Nano-systems Programme, Singapore-MIT Alliance, Singapore 117576
3School of Electrical and Electronic Engineering Division of Microelectronics, School of Physical and Mathematical Sciences, Division of Physics and Applied Physics, Nanyang Technological University, Nanyang Avenue, Singapore 639798

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(Received 22 June 2010; accepted 10 August 2010; published online 3 September 2010)

We propose and demonstrate colloidal quantum dot hybridized, radial p-n junction based, nanopillar solar cells with photovoltaic performance enhanced by intimately integrating nanocrystals to serve as light harvesting agents around the light trapping pillars. By furnishing Si based nanopillar photovoltaic diodes with CdSe quantum dots, we experimentally showed up to sixfold enhancement in UV responsivity and ∼ 13% enhancement in overall solar conversion efficiency. The maximum responsivity enhancement achieved by incorporation of nanocrystals in the nanopillar architecture is found to be spectrally more than four times larger than the responsivity enhancement obtained using planar architecture of the same device.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

cadmium compounds, colloidal crystals, II-VI semiconductors, nanostructured materials, photovoltaic effects, p-n junctions, semiconductor diodes, semiconductor quantum dots, wide band gap semiconductors

PACS

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3485294

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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