TY - JOUR
T1 - Centimeter-Scale and Visible Wavelength Monolayer Light-Emitting Devices
AU - Cho, Joy
AU - Amani, Matin
AU - Lien, Der-Hsien
AU - Kim, Hyungjin
AU - Yeh, Matthew
AU - Wang, Vivian
AU - Tan, Chaoliang
AU - Javey, Ali
PY - 2020/2/5
Y1 - 2020/2/5
N2 - Monolayer 2D transition metal dichalcogenides (TMDCs) have shown great promise for optoelectronic applications due to their direct bandgaps and unique physical properties. In particular, they can possess photoluminescence quantum yields (PL QY) approaching unity at the ultimate thickness limit, making their application in light-emitting devices highly promising. Here, large-area WS2 grown via chemical vapor deposition is synthesized and characterized for visible (red) light-emitting devices. Detail optical characterization of the synthesized films is performed, which show peak PL QY as high as 12%. Electrically pumped emission from the synthetic WS2 is achieved utilizing a transient-mode electroluminescence device structure, which consists of a single metal–semiconductor contact and alternating gate fields to achieve bipolar emission. Utilizing this aforementioned structure, a centimeter-scale (≈0.5 cm2) visible (640 nm) display is demonstrated, fabricated using TMDCs to showcase the potential of this material system for display applications. © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
AB - Monolayer 2D transition metal dichalcogenides (TMDCs) have shown great promise for optoelectronic applications due to their direct bandgaps and unique physical properties. In particular, they can possess photoluminescence quantum yields (PL QY) approaching unity at the ultimate thickness limit, making their application in light-emitting devices highly promising. Here, large-area WS2 grown via chemical vapor deposition is synthesized and characterized for visible (red) light-emitting devices. Detail optical characterization of the synthesized films is performed, which show peak PL QY as high as 12%. Electrically pumped emission from the synthetic WS2 is achieved utilizing a transient-mode electroluminescence device structure, which consists of a single metal–semiconductor contact and alternating gate fields to achieve bipolar emission. Utilizing this aforementioned structure, a centimeter-scale (≈0.5 cm2) visible (640 nm) display is demonstrated, fabricated using TMDCs to showcase the potential of this material system for display applications. © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
KW - chemical vapor deposition
KW - electroluminescence
KW - monolayer display
KW - transition metal dichalcogenide
KW - visible emission
KW - WS2
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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85076182771&origin=recordpage
U2 - 10.1002/adfm.201907941
DO - 10.1002/adfm.201907941
M3 - RGC 21 - Publication in refereed journal
SN - 1616-301X
VL - 30
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 6
M1 - 1907941
ER -