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New Architecture for High‐Efficiency Polymer Photovoltaic Cells Using Solution‐Based Titanium Oxide as an Optical Spacer
Author(s) -
Kim J. Y.,
Kim S. H.,
Lee H.H.,
Lee K.,
Ma W.,
Gong X.,
Heeger A. J.
Publication year - 2006
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200501825
Subject(s) - materials science , photovoltaic system , titanium , titanium oxide , layer (electronics) , active layer , optoelectronics , polymer , energy conversion efficiency , electrode , oxide , polymer solar cell , short circuit , open circuit voltage , nanotechnology , chemical engineering , composite material , voltage , metallurgy , engineering , chemistry , thin film transistor , ecology , physics , quantum mechanics , biology
Polymer photovoltaic cells with power conversion efficiencies approaching 5 % have been fabricated using titanium oxide (TiO x ) as an optical spacer (see Figure). Solar cells with a TiO x layer (deposited via a sol–gel process) between the active layer and the electron‐collecting aluminum electrode exhibit approximately a 50 % enhancement in short‐circuit current compared to similar devices without the optical spacer, as a result of modification of the spatial distribution of the light intensity inside the device.