Solution-processed bulk heterojunction photovoltaic devices based on poly(2-methoxy,5-octoxy)-1,4-phenylenevinylene-multiwalled carbon nanotubes/PbSe quantum dots bilayer

Yiyu Feng; Daqin Yun; Xuequan Zhang; Wei Feng
March 2010
Applied Physics Letters;3/1/2010, Vol. 96 Issue 9, p093301
Academic Journal
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 PbSe quantum 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 (1.71 mA/cm2) 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 exciton dissociation, charge transfer, and mobility in MWNT pathway.


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