Trap-mediated electronic transport properties of gate-tunable pentacene/MoS 2 p-n heterojunction diodes

We investigated the trap-mediated electronic transport properties of pentacene/molybdenum disulphide (MoS ) p-n heterojunction devices. We observed that the hybrid p-n heterojunctions were gate-tunable and were strongly affected by trap-assisted tunnelling through the van der Waals gap at the hetero...

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Veröffentlicht in:Scientific reports 2016-11, Vol.6, p.36775
Hauptverfasser: Kim, Jae-Keun, Cho, Kyungjune, Kim, Tae-Young, Pak, Jinsu, Jang, Jingon, Song, Younggul, Kim, Youngrok, Choi, Barbara Yuri, Chung, Seungjun, Hong, Woong-Ki, Lee, Takhee
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Sprache:eng
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Zusammenfassung:We investigated the trap-mediated electronic transport properties of pentacene/molybdenum disulphide (MoS ) p-n heterojunction devices. We observed that the hybrid p-n heterojunctions were gate-tunable and were strongly affected by trap-assisted tunnelling through the van der Waals gap at the heterojunction interfaces between MoS and pentacene. The pentacene/MoS p-n heterojunction diodes had gate-tunable high ideality factor, which resulted from trap-mediated conduction nature of devices. From the temperature-variable current-voltage measurement, a space-charge-limited conduction and a variable range hopping conduction at a low temperature were suggested as the gate-tunable charge transport characteristics of these hybrid p-n heterojunctions. Our study provides a better understanding of the trap-mediated electronic transport properties in organic/2-dimensional material hybrid heterojunction devices.
ISSN:2045-2322
DOI:10.1038/srep36775