Quantum efficiency versus incident wavelength.
Cell I-V characteristic.
Power response and efficiency of the cell versus the load current on output.
Sketch of the HV generator circuit.
Efficiency of the dc-dc converter: (a) for bench tests with the dc-dc converter connected to a low voltage power supply; (b) for the dc-dc converter connected to the power cell.
Comparison of 7× multiplier behaviour using different components.
Efficiency of the full electronics chain for bench tests and when connected to the power cell. The optical system could not provide HV for 2.5 GΩ load since in this configuration the voltage output by the cell was not sufficient to switch on the first dc-dc converter.
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