Pulsed laser-deposited MoS2 thin films on W and Si: field emission and photoresponse studies
Title | Pulsed laser-deposited MoS2 thin films on W and Si: field emission and photoresponse studies |
Publication Type | Journal Article |
Year of Publication | 2014 |
Authors | Late, DJ, Shaikh, PA, Khare, RT, Kashid, RV, Chaudhary, MV, More, MA, Ogale, SB |
Journal | ACS Applied Materials & Interfaces |
Volume | 6 |
Issue | 18 |
Pagination | 15881-15888 |
Date Published | SEP |
ISSN | 1944-8244 |
Keywords | field emission, MoS2, photodiode heterostructures, pulsed laser deposition, thin film |
Abstract | We report field electron emission investigations on pulsed laser-deposited molybdenum disulfide (MoS2) thin films on W-tip and Si substrates. In both cases, under the chosen growth conditions, the dry process of pulsed laser deposition (PLD) is seen to render a dense nanostructured morphology of MoS2, which is important for local electric field enhancement in field emission application. In the case of the MoS2 film on silicon (Si), the turn-on field required to draw an emission current density of 10 mu A/cm(2) is found to be 2.8 V/mu m. Interestingly, the MoS2 film on a tungsten (W) tip emitter delivers a large emission current density of similar to 30 mA/cm(2) at a relatively lower applied voltage of similar to 3.8 kV. Thus, the PLD-MoS2 can be utilized for various field emission-based applications. We also report our results of photodiode-like behavior in (n- and p- type) Si/PLDMoS2 heterostructures. Finally we show that MoS2 films deposited on flexible kapton substrate show a good photoresponse and recovery. Our investigations thus hold great promise for the development of PLD MoS2 films in application domains such as field emitters and heterostructures for novel nanoelectronic devices. |
DOI | 10.1021/am503464h |
Type of Journal (Indian or Foreign) | Foreign |
Impact Factor (IF) | 5.76 |