Initial fluorescence--[F.sub.0] (A); maximum fluorescence--[F.sub.m] (B); variable fluorescence--[F.sub.v] (C);
quantum efficiency of photosystem II--[F.sub.v]/[F.sub.m] (D)
The
quantum efficiency of emission at 1820 nm is 58.2%, 63.4%, 63.7%, 69.8%, 80.3% for 3 at.% Tm, x at.% Y (x = 0,0.5,1,2,3), respectively.
However, the drawback of this device is the dark count, which was 2.0 x [10.sup.4] cps at the highest
quantum efficiency.
Our proposed mechanism may support for the observed high internal
quantum efficiency in the InGaN/GaN blue LED structure with a high dislocation density.
Ke et al., "Study of the excitation power dependent internal
quantum efficiency in InGaN/GaN LEDs grown on patterned sapphire substrate," IEEE Journal on Selected Topics in Quantum Electronics, vol.
The evolution of the extent of mixing in the latex film as it anneals can then be approximately calculated as the increase in the
quantum efficiency of energy transfer, normalized with the values obtained for the film before annealing ([t.sub.diff] = 0) and for the fully mixed film ([t.sub.diff] = [infinity]) (28):
The flat panel detector has a cesium iodide scintillator with a detector
quantum efficiency level for high-quality images acquired with reduced x-ray dose exposure.
The p-n junction is critical in determining the device's internal
quantum efficiency (IQE), and the substrate is important because it should match the lattice constant of the semiconductor.
Our new custom back side thinning capability enables the highest
quantum efficiency. DALSA also has the ability to tailor the bands capture to the needs of the application and provide solutions on a cost effective and timely basis.