TITLE

Formation and impact of hot spots on the performance of organic photovoltaic cells

AUTHOR(S)
Steim, Roland; Choulis, Stelios A.; Schilinsky, Pavel; Lemmer, Uli; Brabec, Christoph J.
PUB. DATE
January 2009
SOURCE
Applied Physics Letters;1/26/2009, Vol. 94 Issue 4, pN.PAG
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The failure mechanisms of organic solar cells under reverse bias conditions were investigated. Localized inhomogenities, so-called “hot spots,” leading to increased leakage currents under reverse bias, were identified as the dominant origin for failure. The intensity of hot spots does increase with the duration under reverse bias voltage. Cells with a higher leakage current density (i.e., >100 μA/cm-2 at -1 V) have a significant higher probability for dominant failure, while devices with low leakage current densities show less degradation under reverse bias stressing.
ACCESSION #
36435007

 

Related Articles

  • Modeling of bulk and bilayer organic heterojunction solar cells. Cuiffi, Joseph; Benanti, Travis; Wook Jun Nam; Fonash, Stephen // Applied Physics Letters;4/5/2010, Vol. 96 Issue 14, p143307 

    Solar cells require symmetry-breaking features such as built-in electrostatic fields and/or effective fields. We examine an organic heterojunction structure with no built-in field and explore the origins of its current-voltage characteristics and open circuit voltage (VOC). Two behaviors are...

  • On the origin of increased open circuit voltage of dye-sensitized solar cells using 4-tert-butyl pyridine as additive to the electrolyte. Dürr, M.; Yasuda, A.; Nelles, G. // Applied Physics Letters;8/7/2006, Vol. 89 Issue 6, p061110 

    A combination of electrical measurements and surface analysis techniques was used to investigate the electronic structure of the TiO2/electrolyte interface and its change upon addition of 4-tert-butyl pyridine to the electrolyte. A reduced interface defect density and a resulting reduction of...

  • Identification and characterisation of performance limiting defects and cell mismatch in photovoltaic modules. Crozier, Jacqui L.; van Dyk, Ernest E.; Vorster, Frederick J. // Journal of Energy in Southern Africa;Aug2015, Vol. 26 Issue 3, p19 

    The performance and longevity of photovoltaic (PV) modules can be severely limited by cell mismatch occurring when a solar cell in a series-connected string produces a lower current than the other cells in that string. The current output of the entire string is limited by the weakest cell in the...

  • CdSe Quantum Dots Sensitized Mesoporous TiO2 Solar Cells with CuSCN as Solid-State Electrolyte. Guanbi Chen; Lei Wang; Yu Zou; Xia Sheng; Hongjuan Liu; Xiaodong Pi; Deren Yang // Journal of Nanomaterials;2011, p1 

    Mesoporous TiO2 is functionalized by 3-mercaptopropyl trimethyoxysilane (MPTMS) to anchor CdSe quantum dots (QDs). The resulting TiO2/CdSe is combined with solid-state electrolyte (CuSCN) to form solar cells. It is found that the efficiency of electron injection from QDs to TiO2 can be improved...

  • A dynamic Monte Carlo study of anomalous current voltage behaviour in organic solar cells. Feron, K.; Zhou, X.; Belcher, W. J.; Fell, C. J.; Dastoor, P. C. // Journal of Applied Physics;2014, Vol. 116 Issue 21, p214509-1 

    We present a dynamic Monte Carlo (DMC) study of s-shaped current-voltage (I-V) behaviour in organic solar cells. This anomalous behaviour causes a substantial decrease in fill factor and thus power conversion efficiency. We show that this s-shaped behaviour is induced by charge traps that are...

  • Exploring the open-circuit voltage of organic solar cells under low temperature. Qi, Boyuan; Zhou, Qing; Wang, Jizheng // Scientific Reports;6/19/2015, p11363 

    Open-circuit voltage (VOC) in organic solar cells (OSCs) is currently still not well-understood. A generally acceptable view is that VOC is mainly determined by the energy level offset between donor and acceptor materials. Recently in ternary blend OSCs, VOC is found to be dependent on the blend...

  • Influence of deep defects on device performance of thin-film polycrystalline silicon solar cells. Fehr, M.; Simon, P.; Sontheimer, T.; Leendertz, C.; Gorka, B.; Schnegg, A.; Rech, B.; Lips, K. // Applied Physics Letters;9/17/2012, Vol. 101 Issue 12, p123904 

    Employing quantitative electron-paramagnetic resonance analysis and numerical simulations, we investigate the performance of thin-film polycrystalline silicon solar cells as a function of defect density. We find that the open-circuit voltage is correlated to the density of defects, which we...

  • Italian PV.  // Solar Today;May/Jun2000, Vol. 14 Issue 3, p51 

    Reports on developments at solar cells, modules and photovoltaic systems manufacturer Helios Technology. Commitment to research and development; Product offerings.

  • How are PV Cells Made?  // Solar Today;Jul/Aug2010, Vol. 24 Issue 6, p74 

    The article provides an answer to a question of how photovoltaic cells are being made.

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