Tunable Graphene–GaSe Dual Heterojunction Device

• DOI: 10.1002/adma.201504514
• Publication Date: 2016-01-04T12:49:12Z
• Authors: Wonjae Kim; Changfeng Li; Ferney A. Chaves; David Jiménez; Raul D. Rodriguez; Jannatul Susoma; Matthias A. Fenner; Harri Lipsanen; Juha Riikonen
• Keywords: GaSe; Heterojunctions; Schottky; Graphene; ta216; Two-dimensional materials; 01 natural sciences; 7. Clean energy; 0104 chemical sciences

A field-effect device based on dual graphene-GaSe heterojunctions is demonstrated. Monolayer graphene used as electrodes a GaSe channel to form two opposing Schottky diodes controllable by local top gates. The exhibits strong rectification with tunable threshold voltage. Detailed theoretical modeling explain the operation and distinguish differences compared single diode.