Marktech InGaAs/InP PIN photodiodes are designed to convert broadband light into photocurrents
within the VIS-SWIR range.
To prevent inflated photocurrents
arising from stray light, a black metal mask surrounding the active area was a testing cell during all measurements.
For the photovoltaic effect, photocurrents
are generated through accelerating photogenerated electron-hole pairs to respective electrodes by a built-in electrical field at the junction where doping levels of graphene are different at two sides .
As a result, the absorption range of the spectrum would be expanded, leading to an enhanced absorption efficiency of light by the W[O.sub.3-x] crystals, and thus more photoelectrons would be produced during illumination, resulting in the higher photocurrents
and increased conductivity.
In Section 4, we analyze the system performance using the photocurrents
of the photodiodes to determine the signal to noise ratio (SNR) and the BER.
and "open-circuit potential" (OCP) measurements were made in the cell of Figure 2 via a potentiostat 1287 (Solartron).
Since maximum emission intensities give maximum photocurrents
at Diode Array detector, to sense these ones and control spectrum acquisition, we used the moment when the result of I derivate of photocurrents
' sum (determined by the integration of photocurrents
' sum [summation][I.sub.f] If given by Diode- Array detector and time t has the value zero:
The scintillation light from the CsI detectors is converted to current signals using vacuum photodiodes (VPD), and the photocurrents
are converted to voltages and amplified by solid-state electronics .
Absorbed radiation generates two photocurrents
proportional to the wavelength of the incident light.
Analyzing the photocurrents
of the different segments gives the light spot position.
16 different circuits with n-times 1/n partial solar cells for two different cell qualities at a given irradiance (i.e., two different photocurrents
) were simulated as described in Section 2.2.
The spectral analysis of the IPE photocurrents
is shown to be capable of delivering a vast amount of information regarding electron energy band alignment at interfaces of semiconductors with insulator materials provided the nonIPE related components are identified and eliminated.