SKM 2023 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 39: Organic Electronics and Photovoltaics III (joint session CPP/HL)
HL 39.8: Vortrag
Donnerstag, 30. März 2023, 11:30–11:45, GÖR 226
Reducing Dark Current in Highly Ordered Rubrene:C60 Heterojunctions for Organic Photodetectors — •Anna-Lena Hofmann1, Jakob Wolansky1, Lucy Winkler1, Max Herzog1, Felix Talnack2, Eva Bittrich3, Johannes Benduhn1, and Karl Leo1 — 1IAPP, TU Dresden, Dresden, Germany — 2Cfaed, Dresden, Germany — 3Leibniz-Institut für Polymerforschung Dresden e.V., Dresden, Germany
Vacuum-deposited rubrene can form highly ordered phases, demonstrating an exceptionally high charge carrier mobility for holes (>10 cm2 V−1 s−1) even in thin films. Depending on the post-treatment of our films, we can control different crystalline phases. For fast-response OPDs, the triclinic phase is very promising since it exhibits high hole mobility in the vertical direction. However, the high surface roughness is a key reason why these devices fall short in specific detectivity. In this work, we employ different strategies to reduce the impact of Ohmic shunts within the device to minimize the noise current of our devices. We characterize the morphology of our films and investigate the performance parameters of fully working devices. Finally, these characteristics are compared to rubrene’s other two crystalline phases.