Hybrid LEDs based on ZnO‐nanowire arrays | Zendy

ElShaer Abdelhamid | Zendy; Dev Apurba | Zendy; Richters JanPeter | Zendy; Waldvogel Siegfried R. | Zendy; Waltermann Julia | Zendy; Schade Wolfgang | Zendy; Voss Tobias | Zendy

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Hybrid LEDs based on ZnO‐nanowire arrays

Author(s) -

ElShaer Abdelhamid,

Dev Apurba,

Richters JanPeter,

Waldvogel Siegfried R.,

Waltermann Julia,

Schade Wolfgang,

Voss Tobias

Publication year - 2010

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.200983183

Subject(s) - materials science , pedot:pss , electroluminescence , nanowire , optoelectronics , light emitting diode , heterojunction , layer (electronics) , ultraviolet , diode , polystyrene , polymer , nanotechnology , composite material

We report on room temperature electroluminescence from an inorganic/organic heterojunction light emitting diode based on ZnO nanowire arrays. The heterojunction is fabricated by depositing the p‐type polymer poly(3,4 ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) on n‐type ZnO nanowires grown by electrodeposition on transparent conducting glass (ITO) substrates. The nanowires are encapsulated in a thin polystyrene film deposited from high‐molecular‐weight solution. Electron injection occurs through the transparent ITO layer while hole injection is mediated by the PEDOT layer and gold contacts. The current–voltage ( I–V ) characteristics of the device shows a diode‐like behavior. A broad emission spectrum covering most of the visible range and reaching to the near ultraviolet is observed at voltages between 6 and 8 V under ambient condition. The device operation is stable for more than 5 h.

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