AuthorsChoi, Joshua J.
Santiago-Berrios, Mitk’El B.
Bartnik, Adam C.
Malliaras, George G.
Abruña, Héctor D.
Wise, Frank W.
Permanent link to this recordhttp://hdl.handle.net/10754/599152
MetadataShow full item record
AbstractWe report the design, fabrication, and characterization of colloidal PbSe nanocrystal (NC)-based photovoltaic test structures that exhibit an excitonic solar cell mechanism. Charge extraction from the NC active layer is driven by a photoinduced chemical potential energy gradient at the nanostructured heterojunction. By minimizing perturbation to PbSe NC energy levels and thereby gaining insight into the "intrinsic" photovoltaic properties and charge transfer mechanism of PbSe NC, we show a direct correlation between interfacial energy level offsets and photovoltaic device performance. Size dependent PbSe NC energy levels were determined by cyclic voltammetry and optical spectroscopy and correlated to photovoltaic measurements. Photovoltaic test structures were fabricated from PbSe NC films sandwiched between layers of ZnO nanoparticles and PEDOT:PSS as electron and hole transporting elements, respectively. The device current-voltage characteristics suggest a charge separation mechanism that Is distinct from previously reported Schottky devices and consistent with signatures of excitonic solar cells. Remarkably, despite the limitation of planar junction structure, and without film thickness optimization, the best performing device shows a 1-sun power conversion efficiency of 3.4%, ranking among the highest performing NC-based solar cells reported to date. © 2009 American Chemical Society.
CitationChoi JJ, Lim Y-F, Santiago-Berrios MB, Oh M, Hyun B-R, et al. (2009) PbSe Nanocrystal Excitonic Solar Cells. Nano Lett 9: 3749–3755. Available: http://dx.doi.org/10.1021/nl901930g.
SponsorsThis work was supported by Cornell Center for Materials Research SEED fund. J.J.C. acknowledges support from the NSF IGERT fellowship. Y.F.L. acknowledges fellowship from Agency of Science, Technology and Research (A*STAR), Singapore. M.B.S. acknowledges financial support from the Provost's Academic Diversity Postdoctoral Fellowship from Cornell University. L.S. acknowledges support from NYSTAR. M.O. acknowledges support from Cornell Presidential Research Scholars undergraduate research fellowship. A.G. acknowledges support from the KAUST-CU center for energy and sustainability.
PublisherAmerican Chemical Society (ACS)
CollectionsPublications Acknowledging KAUST Support
- Schottky solar cells based on colloidal nanocrystal films.
- Authors: Luther JM, Law M, Beard MC, Song Q, Reese MO, Ellingson RJ, Nozik AJ
- Issue date: 2008 Oct
- Colloidal PbSe Solar Cells with Molybdenum Oxide Modified Graphene Anodes.
- Authors: Wu H, Zhang X, Zhang Y, Yan L, Gao W, Zhang T, Wang Y, Zhao J, Yu WW
- Issue date: 2015 Sep 30
- Heterojunction PbS nanocrystal solar cells with oxide charge-transport layers.
- Authors: Hyun BR, Choi JJ, Seyler KL, Hanrath T, Wise FW
- Issue date: 2013 Dec 23
- Low-temperature approach to high-yield and reproducible syntheses of high-quality small-sized PbSe colloidal nanocrystals for photovoltaic applications.
- Authors: Ouyang J, Schuurmans C, Zhang Y, Nagelkerke R, Wu X, Kingston D, Wang ZY, Wilkinson D, Li C, Leek DM, Tao Y, Yu K
- Issue date: 2011 Feb
- Solar cells based on junctions between colloidal PbSe nanocrystals and thin ZnO films.
- Authors: Leschkies KS, Beatty TJ, Kang MS, Norris DJ, Aydil ES
- Issue date: 2009 Nov 24