Details

Autor(en) / Beteiligte

• Kang, Jang-Won
• Choi, Yong-Seok
• Kim, Byeong-Hyeok
• Goo Kang, Chang
• Hun Lee, Byoung
• Tu, C. W.
• Park, Seong-Ju

Titel

Ultraviolet emission from a multi-layer graphene/MgZnO/ZnO light-emitting diode

Ist Teil von

• Applied physics letters, 2014-02, Vol.104 (5)

Ort / Verlag

Melville: American Institute of Physics

Erscheinungsjahr

2014

Link zum Volltext

Quelle

AIP Journals Complete

Beschreibungen/Notizen

• We report on ultraviolet emission from a multi-layer graphene (MLG)/MgZnO/ZnO light-emitting diodes (LED). The p-type MLG and MgZnO in the MLG/MgZnO/ZnO LED are used as transparent hole injection and electron blocking layers, respectively. The current-voltage characteristics of the MLG/MgZnO/ZnO LED show that current transport is dominated by tunneling processes in the MgZnO barrier layer under forward bias conditions. The holes injected from p-type MLG recombine efficiently with the electrons accumulated in ZnO, and the MLG/MgZnO/ZnO LED shows strong ultraviolet emission from the band edge of ZnO and weak red-orange emission from the deep levels of ZnO.