Open AccessThe roles of bulk and interfacial molecular orientations in determining the performance of organic bilayer solar cells (presentation video)
Author(s) -
Guy O. Ngongang Ndjawa,
Kenneth R. Graham,
Sarah M. Conron,
Patrick Erwin,
Ruipeng Li,
Kang Wei Chou,
George F. Burkhard,
Lethy Krishnan Jagadamma,
Eric T. Hoke,
Michael D. McGehee,
Mark E. Thompson,
Aram Amassian
Publication year - 2014
Publication title -
proceedings of spie, the international society for optical engineering/proceedings of spie
Language(s) - English
Resource type - Conference proceedings
SCImago Journal Rank - 0.192
H-Index - 176
eISSN - 1996-756X
pISSN - 0277-786X
DOI - 10.1117/12.2063817
Subject(s) - bilayer , materials science , orientation (vector space) , chemical physics , photovoltaic system , molecule , organic solar cell , optoelectronics , nanotechnology , physics , membrane , chemistry , ecology , biochemistry , geometry , mathematics , composite material , biology , polymer , quantum mechanics
Molecular orientation plays a significant role in determining the performance of small molecule solar cells. Key photovoltaic processes in these cells are strongly dependent on how the molecules are oriented in the active layer. We isolate contributions arising from the bulk molecular orientations vs. those from interfacial orientations in ZnPc/C60 bilayer systems and we probe these contributions by comparing device pairs in which only the bulk or the interface differ. By controlling the orientation in the bulk the current can be strongly modulated, whereas controlling the interfacial molecular orientation and degree of intermixing mediate the voltage
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