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Charge Injection in Organics George Malliaras, Cornell University, DMR -0094047

Charge Injection in Organics George Malliaras, Cornell University, DMR -0094047.

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Charge Injection in Organics George Malliaras, Cornell University, DMR -0094047

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  1. Charge Injection in OrganicsGeorge Malliaras, Cornell University, DMR-0094047 • Junctions between n-type and p-type semiconductors are the cornerstone of modern electronic materials technology as they enable a variety of solid-state devices such as transistors, light-emitting diodes, and photovoltaic cells. • • Using soft-contact lamination, we fabricated ionic junctions between two organic semiconductors with mobile anions and cations, respectively. We show that mobile ionic charge can be successfully deployed to control the direction of electronic current flow in semiconductor devices. • These devices show electroluminescence under forward bias, and a photo-voltage upon illumination with visible light. This work shows that ionic charge carriers can enhance the performance of existing electronic devices as well as enable new functionalities. Fig. The diffusion of mobile anions and cations across the junction between two layers of semiconductor with mobile ions sets-up a built-in potential which controls the flow of electronic carriers.

  2. Charge Injection in OrganicsGeorge Malliaras, Cornell University, DMR-0094047 Education: This work involves the training of two graduate students (Dan Bernards and Jason Slinker) and several undergraduate students (Sara Parker, Jonathan Rivnay, Man Hoi Wong, and Mo Zhang). This past summer, our research group hosted two undergraduate students (Gabriel Ortiz from University of Miami and Regina Yopak from Simmons College) as part of an REU program. Outreach: For the last five years Malliaras helped run the CURIE Academy, a one-week residential program for high school girls who excel in math and science. He also participated in CATALYST, a one-week summer residential program for rising high school sophomores, juniors, and seniors from underrepresented back-grounds. These programs offer classes, labs, and research experiences designed and taught by Cornell's faculty and graduate students. They seek to advance diversity in engineering and especially encourage members of groups underrepresented in the fields of math, science, and engineering to apply. Fig. The PI supervises CURIE academy students who take apart CD players.

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