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Energy Express

Energy Express

  • Editor: Bernard Kippelen
  • Vol. 18, Iss. S3 — Sep. 13, 2010
  • pp: A451–A457

Dead zones in colloidal quantum dot photovoltaics: evidence and implications

D. Aaron R. Barkhouse, Illan J. Kramer, Xihua Wang, and Edward H. Sargent  »View Author Affiliations


Optics Express, Vol. 18, Issue S3, pp. A451-A457 (2010)
http://dx.doi.org/10.1364/OE.18.00A451


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Abstract

In order to fabricate photovoltaic (PV) cells incorporating light-trapping electrodes, flexible foil substrates, or more than one junction, illumination through the top-contact (i.e.: non-substrate) side of a photovoltaic device is desirable. We investigate the relative collection efficiency for illumination through the top vs. bottom of PbS colloidal quantum dot (CQD) PV devices. The external quantum efficiency spectra of FTO/TiO2/PbS CQD/ITO PV devices with various PbS layer thicknesses were measured for illumination through either the top (ITO) or bottom (FTO) contacts. By comparing the relative shapes and intensities of these spectra with those calculated from an estimation of the carrier generation profile and the internal quantum efficiency as a function of distance from the TiO2 interface in the devices, a substantial dead zone, where carrier extraction is dramatically reduced, is identified near the ITO top contact. The implications for device design, and possible means of avoiding the formation of such a dead zone, are discussed.

© 2010 OSA

OCIS Codes
(040.5350) Detectors : Photovoltaic
(230.0230) Optical devices : Optical devices
(250.0250) Optoelectronics : Optoelectronics
(250.5590) Optoelectronics : Quantum-well, -wire and -dot devices

ToC Category:
Photovoltaics

History
Original Manuscript: July 1, 2010
Revised Manuscript: August 27, 2010
Manuscript Accepted: August 27, 2010
Published: September 1, 2010

Virtual Issues
Focus Issue: Thin-Film Photovoltaic Materials and Devices (2010) Optics Express

Citation
D. Aaron R. Barkhouse, Illan J. Kramer, Xihua Wang, and Edward H. Sargent, "Dead zones in colloidal quantum dot photovoltaics: evidence and implications," Opt. Express 18, A451-A457 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-S3-A451


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References

  1. J. Zhu, Z. F. Yu, G. F. Burkhard, C. M. Hsu, S. T. Connor, Y. Q. Xu, Q. Wang, M. McGehee, S. H. Fan, and Y. Cui, “Optical absorption enhancement in amorphous silicon nanowire and nanocone arrays,” Nano Lett. 9(1), 279–282 (2009). [CrossRef]
  2. Z. Y. Fan, H. Razavi, J. W. Do, A. Moriwaki, O. Ergen, Y. L. Chueh, P. W. Leu, J. C. Ho, T. Takahashi, L. A. Reichertz, S. Neale, K. Yu, M. Wu, J. W. Ager, and A. Javey, “Three-dimensional nanopillar-array photovoltaics on low-cost and flexible substrates,” Nat. Mater. 8(8), 648–653 (2009). [CrossRef] [PubMed]
  3. D. Bremaud, D. Rudmann, M. Kaelin, K. Ernits, G. Bilger, M. Dobeli, H. Zogg, and A. N. Tiwari, “Flexible Cu(In,Ga)Se-2 on Al foils and the effects of Al during chemical bath deposition,” Thin Solid Films 515(15), 5857–5861 (2007). [CrossRef]
  4. X. Mathew, J. P. Enriquez, A. Romeo, and A. N. Tiwari, “CdTe/CdS solar cells on flexible substrates,” Sol. Energy 77(6), 831–838 (2004). [CrossRef]
  5. A. Romeo, A. Terheggen, D. Abou-Ras, D. L. Batzner, F. J. Haug, M. Kalin, D. Rudmann, and A. N. Tiwari, “Development of thin-film Cu(In,Ga)Se-2 and CdTe solar cells,” Prog. Photovoltaics 12(23), 93–111 (2004). [CrossRef]
  6. A. G. Pattantyus-Abraham, I. J. Kramer, A. R. Barkhouse, X. Wang, G. Konstantatos, R. Debnath, L. Levina, I. Raabe, M. K. Nazeeruddin, M. Grätzel, and E. H. Sargent, “Depleted-heterojunction colloidal quantum dot solar cells,” ACS Nano 4(6), 3374–3380 (2010). [CrossRef] [PubMed]
  7. D. A. R. Barkhouse, A. G. Pattantyus-Abraham, L. Levina, and E. H. Sargent, “Thiols passivate recombination centers in colloidal quantum dots leading to enhanced photovoltaic device efficiency,” ACS Nano 2(11), 2356–2362 (2008). [CrossRef]
  8. J. P. Clifford, G. Konstantatos, K. W. Johnston, S. Hoogland, L. Levina, and E. H. Sargent, “Fast, sensitive and spectrally tuneable colloidal-quantum-dot photodetectors,” Nat. Nanotechnol. 4(1), 40–44 (2009). [CrossRef] [PubMed]
  9. G. I. Koleilat, L. Levina, H. Shukla, S. H. Myrskog, S. Hinds, A. G. Pattantyus-Abraham, and E. H. Sargent, “Efficient, stable infrared photovoltaics based on solution-cast colloidal quantum dots,” ACS Nano 2(5), 833–840 (2008). [CrossRef]
  10. J. M. Luther, M. Law, M. C. Beard, Q. Song, M. O. Reese, R. J. Ellingson, and A. J. Nozik, “Schottky solar cells based on colloidal nanocrystal films,” Nano Lett. 8(10), 3488–3492 (2008). [CrossRef] [PubMed]
  11. M. Law, M. C. Beard, S. Choi, J. M. Luther, M. C. Hanna, and A. J. Nozik, “Determining the internal quantum efficiency of PbSe nanocrystal solar cells with the aid of an optical model,” Nano Lett. 8(11), 3904–3910 (2008). [CrossRef] [PubMed]
  12. H. Schmidt, H. Flugge, T. Winkler, T. Bulow, T. Riedl, and W. Kowalsky, “Efficient semitransparent inverted organic solar cells with indium tin oxide top electrode,” Appl. Phys. Lett. 94(24), 243302 (2009). [CrossRef]
  13. K. C. Liu, C. W. Teng, Y. H. Lu, J. H. Lee, and L. C. Chen, “Improving the performance of transparent PLEDs with LiF/Ag/ITO cathode,” Electrochem. Solid-State Lett. 10(10), J120–J122 (2007). [CrossRef]

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