active layer


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active layer

[′ak·tiv ′lā·ər]
(geology)
That part of the soil which is within the suprapermafrost layer and which usually freezes in winter and thaws in summer. Also known as frost zone.
References in periodicals archive ?
Recent advances in solar cell technology use polycrystalline perovskite films as the active layer, with an increase to efficiency of as much as 24.2%.
The layer of ice that forms above the permafrost every winter, and thaws in the summer is called the 'active layer'.
The sensors feature an IP66 seal and a very thin active layer with a thickness of 0.5 mm, while a double-sided adhesive layer allows for easy assembly.
To the best of our knowledge, this material has not been used as a surface plasmon resonance (SPR) active layer for the detection of metal ions.
Active layer is the uppermost layer of soil alternately freezing and thawing in the presence of permafrost at its base [33].
"We take an approach where we actually make the luminescent active layer itself transparent."
Because the active layer had quaternary ammonium group distribution and allowed a stronger repulsion for [Ca.sup.2+] than [Na.sup.+].
When the device is forward biased, the carriers flow into the active layer and recombines with each other to enhance emitting light.
The ions move through a layer of amorphous chalcogenide material (the active layer) to reach the lower potential electrode where they are reduced to their metallic form and eventually form a conductive pathway between both electrodes that spans the active material layer, lowering the device resistance." (3)
The substrate material is p-type semi-insulating (SI) GaAs whereas the active layer is of n-type GaAs.
Ambipolar transport is dependence of the first active layer thickness ([F.sub.16]CuPc, fluorinated copper phthalocyanine) in an [F.sub.16]CuPc/CuPc (copper phthalocyanine) heterojunction, and only n-channel operation is observed when [F.sub.16]CuPc films are over a critical thickness of ~12 nm.

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