Illumination mismatch

Studies of UPD are important for a number of reasons, most importantly, because they are the formation of the first atomic layer in an electrodeposit. In the present text, they are important because they illuminate the structures of electro-deposited atomic layers, the reactants in EC-ALE. However, such studies must be kept in context, given that the structures of the first UPD layers on a substrate generally have little to do with the structures of subsequently formed compound mono-layers. It has been found that the structures of compound monolayers are determined, for the most part, by the structure of the compound that is forming, perturbed by the lattice mismatch between the deposit and the substrate. The structure of the first atomic layer on the substrate does not appear to be a significant factor in determining... 

Fig. 5.22. Characteristics for devices with an active layer that is spin-coated from a toluene solution (open squares) Jsc = 2.33 mA/cm2, V, . = 0.82 V, FF = 0.50, 77AM 1.5 = 0.9%, and from a chlorobenzene solution (open circles) Jsc = 5.25 mA/cm2, Voc = 0.82 V, FF = 0.61, t am 1.5 = 2.5%. Data are for devices illuminated with an intensity of 80 mW/cm2 and an AM 1.5 spectral mismatch factor of 0.753. The temperature of the samples during measurement was 50°C...

This approach to assessing STH from two overlayed three-electrode measurements often overestimates the true two-electrode performance, mainly because integration of multiple material components is rarely a perfect process. Factors include lost illumination (e.g. catalyst shadowing, mismatched refractive indices resulting in increased reflection, absorption mismatched band gaps), ohmic resistance (iR) losses, and non-ideal interfacial engineering of the various... 

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