Energy Level Alignment and Morphology of Ag and Au Nanoparticle Recombination Contacts in Tandem Planar Heterojunction Solar Cells
| Autor: | Erin L. Ratcliff, Selina Olthof, Neal R. Armstrong, Gordon A. MacDonald, Antoine Kahn, K. Xerxes Steirer, Jeremy Gantz |
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| Rok vydání: | 2013 |
| Předmět: |
Materials science
Organic solar cell business.industry Analytical chemistry Heterojunction Hybrid solar cell Acceptor Polymer solar cell Surfaces Coatings and Films Electronic Optical and Magnetic Materials General Energy Electron affinity Optoelectronics Work function Physical and Theoretical Chemistry Ionization energy business |
| Zdroj: | The Journal of Physical Chemistry C. 117:22331-22340 |
| ISSN: | 1932-7455 1932-7447 |
| Popis: | We present the interface characterization of vacuum-deposited metal nanoparticle recombination layers (Ag, Au; 1 nm equivalent thickness) at donor/acceptor heterojunctions comprising copper phthalocyanine (CuPc) and C60 as model interfaces for tandem planar heterojunction organic photovoltaics (TOPVs). We compare the extent to which voltage doubling occurs using these two metal recombination contacts (RC) in TOPVs (ITO/CuPc/C60/(Ag,Au)/CuPc/C60/BCP/Al) and correlate the differences with energetic dissimilarities revealed by UV-photoemission (UPS) and inverse photoemission (IPES) spectroscopies, and morphology as revealed by atomic force microscopy (AFM) and field-emission scanning electron microscopy (FE-SEM). Ag interlayer RCs produce the expected voltage doubling in the open-circuit voltage (VOC) for the TOPV, whereas Au RCs showed poor voltage addition. Significant shifts in ionization potential and electron affinity and shifts in local work function were observed for C60/metal heterojunctions and for ... |
| Databáze: | OpenAIRE |
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