2020
DOI: 10.1021/acsami.0c14398
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Optoelectronic Properties of a van der Waals WS2 Monolayer/2D Perovskite Vertical Heterostructure

Abstract: Ruddlesden−Popper perovskites have been demonstrated to possess great potential for optical and optoelectronic devices. Because they exhibit better ambient stability than three-dimensional (3D) perovskites, they have been considered as potential substitutes for 3D perovskites as light absorbing layers to improve the photoresponsivity of monolayer transition metal dichalcogenide (TMDC)-based photodetectors. Investigation of the optoelectronic properties of TMDC monolayer/2D perovskite vertical heterostructures … Show more

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Cited by 67 publications
(74 citation statements)
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“…Similar to the case of perovskite solar cells, [84] the development of optoelectronic devices based on 2DP/TMD stacks significantly outpaced the understanding of their fundamental properties. Despite successful demonstrations of photodetectors or photovoltaic devises based on van der Waals heterostructures composed of 2DPs and TMDs or other layered materials, [23,24,27,[85][86][87][88][89] still very little is know about the fundamental mechanisms standing behind their operation. Most published work focuses on the device performance and only a few publications attempt to provide a more detailed understanding of the photophysics, excitation transfer mechanism and mutual impact of the layers.…”
Section: Photophysics Of 2dp/tmds Stacksmentioning
confidence: 99%
See 1 more Smart Citation
“…Similar to the case of perovskite solar cells, [84] the development of optoelectronic devices based on 2DP/TMD stacks significantly outpaced the understanding of their fundamental properties. Despite successful demonstrations of photodetectors or photovoltaic devises based on van der Waals heterostructures composed of 2DPs and TMDs or other layered materials, [23,24,27,[85][86][87][88][89] still very little is know about the fundamental mechanisms standing behind their operation. Most published work focuses on the device performance and only a few publications attempt to provide a more detailed understanding of the photophysics, excitation transfer mechanism and mutual impact of the layers.…”
Section: Photophysics Of 2dp/tmds Stacksmentioning
confidence: 99%
“…[137,138] So far, these aspects have not been addressed explicitly by the available reports and no long term test of the devices have been presented. However, in some reports, heterostructures have been encapsulated in hBN, [88,92] which represents a first step towards the solution of this problem. Another aspect which might be important is the quality of the interface.…”
Section: Selection Of Organic Spacermentioning
confidence: 99%
“…Figure 6b is photocurrent dependence on the illumination power, at V D = 0 V, extracted from the time‐resolved photoresponse in the inset. The photocurrent shows a linear increase with illumination power, indicating high efficiency in photogenerated charge carrier extraction in our vertical PN diode, [ 28 ] which can be contributed by the proper band alignment between MoS 2 and CsPbBr 3 and short transit distance in vertical geometry. The zero‐biased diode displays a distinct photoresponse even at a low illumination power ( P = 0.390 mW), where the photoresponsivity is evaluated as 8 × 10 −3 A W −1 .…”
Section: Resultsmentioning
confidence: 99%
“…The number of quantum wells and organic layers in a unit cell defines the order of the HOIP. (12)(13)(14)(15)(16) Different from exciton property of individual materials, stacking two semiconducting materials such as TMDC heterostructure, (17)(18)(19) TMDC/organic, (20)(21)(22) TMDC/perovskite QDs (23)(24)(25) and TMDC/HOIP (26)(27)(28)(29) hybrid structure or even trilayer heterostructures (30,31) results in the formation of charge-transfer excitons or interlayer excitons which exhibits long-lived states with their dipole moment (out-of-plane) different from their in-plane dipole moment.…”
Section: Introduction To Excitonic Materialsmentioning
confidence: 99%