Power losses in bilayer inverted small molecule organic solar cells
Bakke, Jonathan R.
Brennan, Thomas P.
Bent, Stacey F.
Thompson, Mark E.
KAUST Grant NumberKUS-C1-015-21
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AbstractInverted bilayer organic solar cells using copper phthalocyanine (CuPc) as a donor and C60 as an acceptor with the structure: glass/indium tin oxide (ITO)/ZnO/C60/CuPc/MoO3/Al, in which the zinc oxide (ZnO) was deposited by atomic layer deposition, are compared with a conventional device: glass/ITO/CuPc/C60/bathocuproine/Al. These inverted and conventional devices give short circuit currents of 3.7 and 4.8 mA/cm 2, respectively. However, the inverted device gives a reduced photoresponse from the CuPc donor compared to that of the conventional device. Optical field models show that the arrangement of organic layers in the inverted devices leads to lower absorption of long wavelengths by the CuPc donor; the low energy portion of the spectrum is concentrated near the metal oxide electrode in both devices. © 2012 American Institute of Physics.
CitationTrinh C, Bakke JR, Brennan TP, Bent SF, Navarro F, et al. (2012) Power losses in bilayer inverted small molecule organic solar cells. Applied Physics Letters 101: 233903. Available: http://dx.doi.org/10.1063/1.4769440.
SponsorsWe acknowledge financial support from the Global Photonic Energy Corporation (GPEC), the King Abdullah University of Science and Technology (KAUST, KUS-C1-015-21), and the National Science Foundation Solar Energy Initiative (SOLAR, CHE-0934098). J.R.B. acknowledges funding from the National Science Foundation (NSF) Graduate Fellowship under Grant No. DGE-0645962. T.P.B. is supported by an Albion Walter Hewlett Fellowship. We would like to thank Dr. Cody Schlenker and Dr. Zhiwei Liu for helpful discussions.
JournalApplied Physics Letters