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Solution-processed bulk heterojunction photovoltaic devices based on poly(2-methoxy,5-octoxy)-1,4-phenylenevinylene-multiwalled carbon nanotubes/PbSe quantum dots bilayer
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A solution-processed bulk heterojuction photovoltaic cell was fabricated based on poly[(2-methoxy,5-octoxy)-1,4-phenylenevinylene](MOPPV)-multiwalled carbon nanotubes (MWNT)/spherical PbSequantum dots bilayer. Surface morphology shows the interpenetrating network of well-dispersed MWNT in MOPPV matrix. Blueshifted band in absorption and photoluminescence spectra indicate the strong electron interaction between MWNT and MOPPV. A marked twofold increase in short-circuit current and power-conversion efficiency (0.40%) of ITO/MOPPV-MWNT:phenyl-C61-butyric acid methyl ester (PCBM)/PbSe/Al devices was achieved compared with that without MWNT. Results indicate that the enhanced performance was contributed by high photocurrent due to efficient excitondissociation,charge transfer, and mobility in MWNT pathway.
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