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Proceedings Paper

The 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 Conron; Patrick Erwin; Ruipeng Li; Kang Wei Chou; George Burkhard; Lethy Krishnan Jagadamma; Eric T. Hoke; Michael D. McGehee; Mark E. Thompson; Aram Amassian
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Paper Abstract

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.

Paper Details

Date Published: 17 August 2014
PDF: 1 pages
Proc. SPIE 9165, Physical Chemistry of Interfaces and Nanomaterials XIII, 916506 (17 August 2014); doi: 10.1117/12.2063817
Show Author Affiliations
Guy O. Ngongang Ndjawa, King Abdullah Univ. of Science and Technology (Saudi Arabia)
Kenneth R. Graham, King Abdullah Univ. of Science and Technology (Saudi Arabia)
Stanford Univ. (United States)
Sarah Conron, University of Southern California (United States)
Patrick Erwin, The Univ. of Southern California (United States)
Ruipeng Li, King Abdullah Univ. of Science and Technology (Saudi Arabia)
Kang Wei Chou, Lawrence Berkeley National Lab. (United States)
George Burkhard, Stanford Univ. (United States)
Lethy Krishnan Jagadamma, King Abdullah University of Science and Technology (Saudi Arabia)
Eric T. Hoke, Stanford Univ. (United States)
Michael D. McGehee, Stanford Univ. (United States)
Mark E. Thompson, The Univ. of Southern California (United States)
Aram Amassian, King Abdullah Univ. of Science and Technology (Saudi Arabia)


Published in SPIE Proceedings Vol. 9165:
Physical Chemistry of Interfaces and Nanomaterials XIII
Natalie Banerji; Sophia C. Hayes; Carlos Silva, Editor(s)

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