λ
?
dλ
Equation
?
?
4
where J0 is the current density, ηout(x) and ηEQE(x) are the outcoupling and external quantum efficiencies of the sensing layer at position x. The ηout(x) is calculated based on Green's function analysis in FIG. 8B. The range of ?3 nm F?rster energy transfer limits the spatial resolution of the measurement.
Results
FIG. 9A shows the structure of a hybrid LED with the frontier energy levels in FIG. 9B. Organic hole injection/transport layers (HIL and HTL) comprising 2 nm thick MoO3 and 50 nm thick TAPC were deposited on top of the transparent anode (150 nm thick ITO), and then an organic host layer comprising 12 nm thick neat CBP was deposited. An mWS2 was transferred onto the organic host by the method described in FIG. 7 and the accompanying description above. After transfer, a 3 nm thick capping host (CBP) layer was deposited, along with a 55 nm electron transport layer (ETL) and the top A1 contact.
