The roles of bulk and interfacial molecular orientations in determining the performance of organic bilayer solar cells
AuthorsNgongang Ndjawa, Guy O.
Graham, Kenneth R.
Chou, Kang Wei
Krishnan Jagadamma, Lethy
Hoke, Eric T.
McGehee, Michael D.
Thompson, Mark E.
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
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AbstractMolecular 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.
CitationGuy O. Ngongang Ndjawa ; Kenneth R. Graham ; Sarah Conron ; Patrick Erwin ; Ruipeng Li ; Kang Wei Chou ; George Burkhard ; Lethy Krishnan Jagadamma ; Eric T. Hoke ; Michael D. McGehee ; Mark E. Thompson ; Aram Amassian; The roles of bulk and interfacial molecular orientations in determining the performance of organic bilayer solar cells (presentation video)
PublisherSPIE-Intl Soc Optical Eng
Conference/Event namePhysical Chemistry of Interfaces and Nanomaterials XIII