TITLE

Increased open-circuit voltage in a Schottky device using PbS quantum dots with extreme confinement

AUTHOR(S)
Choi, Hyekyoung; Kwan Kim, Jun; Hoon Song, Jung; Kim, Youngjo; Jeong, Sohee
PUB. DATE
May 2013
SOURCE
Applied Physics Letters;5/13/2013, Vol. 102 Issue 19, p193902
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We fabricated the PbS nanocrystal quantum dots (NQDs) based Schottky structure device (ITO/PbS/LiF/Al) with varying bandgap of NQDs from 0.8 to 2.2 eV. The open-circuit voltage increased monotonically with NQD's bandgap until 0.67 V, achieved using extremely confined, 1.5 nm sized-PbS NQDs. The power conversion efficiency reached the maximum value over 3% under AM 1.5 with NQD's bandgap of about 1.3 eV. Size-dependent photovoltaic evaluation in extreme confinement regime provides basis for efficient multi-junction solar cells composed of PbS NQDs of different sizes.
ACCESSION #
87655879

 

Related Articles

  • Effects of AlGaAs energy barriers on InAs/GaAs quantum dot solar cells. Sablon, K. A.; Little, J. W.; Olver, K. A.; Wang, Zh. M.; Dorogan, V. G.; Mazur, Yu. I.; Salamo, G. J.; Towner, F. J. // Journal of Applied Physics;Oct2010, Vol. 108 Issue 7, p074305 

    We have studied the effects of AlGaAs energy barriers surrounding self-assembled InAs quantum dots in a GaAs matrix on the properties of solar cells made with multiple quantum dot layers in the active region of a photodiode. We have compared the fenced dot samples with conventional InAs/GaAs...

  • Nanostructure control of Si and Ge quantum dots based solar cells using plasma processes. Shiratani, Masaharu; Uchida, Giichiro; Hyunwoong Seo; Daiki Ichida; Kazunori Koga; Naho Itagaki; Kunihiro Kamataki // Materials Science Forum;2014, Vol. 783-786, p2022 

    We report characteristics of quantum dot (QD) sensitized solar cells using Si nanoparticles and Ge nanoparticles. Si nanoparticles were synthesized by multi-hollow discharge plasma chemical vapor deposition, whereas Ge nanoparticles were done by a radio frequency magnetron sputtering using Ar+H2...

  • Quantum-dot-induced optical transition enhancement in InAs quantum-dot-embedded p-i-n GaAs solar cells. Shang, X.-J.; He, J.-F.; Li, M.-F.; Zhan, F.; Ni, H.-Q.; Niu, Z.-C.; Pettersson, H.; Fu, Y. // Applied Physics Letters;9/12/2011, Vol. 99 Issue 11, p113514 

    Photocurrents (PCs) of three p-i-n GaAs solar cells, sample A with InAs quantum dots (QDs) embedded in the depletion region, B with QDs in the n region, and C without QDs, were studied experimentally and theoretically. Above GaAs bandgap, the PC of A is increased, while B is decreased with...

  • Enhancement of solar cell performance by employing planar spectral converters. van Sark, W. G. J. H. M. // Applied Physics Letters;10/10/2005, Vol. 87 Issue 15, p151117 

    The effect on solar cell performance of planar converters containing quantum dots (QDs) as wavelength-shifting entities on top of multicrystalline silicon cells was investigated by means of model studies with varying incident spectra. These included global, direct, and diffuse spectra with Air...

  • Morphological control of hybrid polymer-quantum dot solar cells with electron acceptor ligands. Boivin, Mathieu; Lamarre, Sébastien; Tessier, Jonathan; Lecavalier, Marie-Ève; Najari, Ahmed; Dufour-Beauséjour, Sophie; Brown Dussault, Evelyne; Collin, Pierre; Allen, Claudine Nì. // Applied Physics Letters;1/16/2012, Vol. 100 Issue 3, p033302 

    We integrate the electro-attractive conjugated molecule tetrafluoro-tetracyano-quinodimethane (F4TCNQ) in the active layer of polymer-CdSe colloidal quantum dot (cQD) solar cells. The addition of this molecule enhances cQD dispersion inside the polymer. In tuning its concentration, we can...

  • An energy-harvesting scheme utilizing Ga-rich CuIn(1-x)GaxSe2 quantum dots for dye-sensitized solar cells. Lin, Chin-An; Huang, K. P.; Ho, S. T.; Huang, Mei-Wen; He, Jr-Hau // Applied Physics Letters;9/17/2012, Vol. 101 Issue 12, p123901 

    Ga-rich CuIn(1-x)GaxSe2 (CIGS) quantum dots (QDs) with a wide bandgap of 1.58 eV were utilized in dye-sensitized solar cells for energy harvesting. Ga-rich CIGS QDs at TiO2 photoanodes afford the recombination reduction and thus suppress the dark current, leading to the increase of short-circuit...

  • High efficiency of CdSe quantum-dot-sensitized TiO2 inverse opal solar cells. Diguna, Lina J.; Shen, Qing; Kobayashi, Junya; Toyoda, Taro // Applied Physics Letters;7/9/2007, Vol. 91 Issue 2, p023116 

    The authors have demonstrated an approach to sensitized-type solar cells, based on TiO2 inverse opal and the use of CdSe quantum dots (QDs) as sensitizers. CdSe QDs were grown in situ on TiO2 inverse opal electrodes, utilizing a chemical bath deposition method. All of the photovoltaic...

  • Towards depleted heterojunction solar cells with CuInS2 and ZnO nanocrystals. Scheunemann, Dorothea; Wilken, Sebastian; Parisi, Jürgen; Borchert, Holger // Applied Physics Letters;9/23/2013, Vol. 103 Issue 13, p133902 

    Colloidal quantum dot solar cells have shown remarkable improvements in performance during the last few years. Until now, mostly Pb- or Cd-based nanocrystals were used as absorber material, which might limit the potential application of nanocrystal solar cells due to toxicity issues. A...

  • Plasmonic engineering of spontaneous emission from silicon nanocrystals. Goffard, Julie; Gérard, Davy; Miska, Patrice; Baudrion, Anne-Laure; Deturche, Régis; Plain, Jérôme // Scientific Reports;9/20/2013, p1 

    Silicon nanocrystals offer huge advantages compared to other semi-conductor quantum dots as they are made from an abundant, non-toxic material and are compatible with silicon devices. Besides, among a wealth of extraordinary properties ranging from catalysis to nanomedicine, metal nanoparticles...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics