PHOTOVOLTAIC CELL WITH FIBER MESH SUPPORT AND CHARGER FOR PORTABLE ELECTRONICS
FIG12 shows a diagram based on measured values for generated power per area (µW/cm2) for light intensities between 200 and 50 000 Lux for the second example of solar cell unit  FIG11 shows a diagram based on measured values for generated current (µA/cm2) for light intensities between 200 and 50 000 Lux for the second example of the solar cell unit
FIG12 shows a diagram of generated power per area (µW/cm2) for light intensities between 200 and 50 000 Lux calculated based on the measured values of voltage and current of table 1. As seen from the diagram, the measured power is substantially proportional to the incoming light intensity in the interval 200 - 20 000 Lux.  FIG11 shows a diagram of generated current (µA/cm2) for light intensities between 200 and 50 000 Lux based on the measured values of table 2. As seen from the figure, the current increases linearly.
diagram
12
layer layers
11
photovoltaic charger
3000
between
2000
than
1000
irradiation is linear with intensities between
5000
solar cell unit is
23
x
1500
about
['1. A photovoltaic charger (1;1a;1b) specially adapted for charging an electronic device, comprising: • a solar cell unit (2) comprising: - a working electrode comprising a porous light-absorbing layer (10) including dyed TiO 2 , - a porous first conducting layer (12) for extracting photo-generated electrons from the light-absorbing layer (10), wherein the light-absorbing layer is arranged on top of the first conducting layer, - a porous substrate (14) made of an insulating material and extending through the entire solar cell unit, wherein the first conducting layer (12) is formed on one side of the porous substrate (14), - a counter electrode including a second conducting layer (16), wherein the second conducting layer is formed on the opposite side of the porous substrate (14), and - a conducting medium for transferring charges between the counter electrode and the light-absorbing layer, • an encapsulation (5) encapsulating the solar cell unit, • a first conductor (18) electrically connected to the first conducting layer (12), and • at least one second conductor (20) electrically connected to the second conducting layer (16), wherein the photovoltaic charger contains only one single solar cell unit (2) and a boost converter (22) electrically connected to the first and second conductors (12, 16), and the boost converter is adapted to step up the voltage from the solar cell unit while stepping down the current from the solar cell unit.', '6. The photovoltaic charger according to any of the previous claims, wherein the solar cell unit (2) generates a voltage varying less than 40% when the light intensity received by the light-absorbing layer is varying between 200 and 50 000 Lux.', '7. The photovoltaic charger according to any of the previous claims, wherein the solar cell unit (2) produces a current of at least 15 µA/cm 2  when the light intensity received by the light-absorbing layer is 200 Lux, and the current produced by the solar cell unit is linearly increasing when the light intensity received by the light-absorbing layer increases from 200 to 20 000 Lux.']