AN3432

Photocurrent production basics of silicon solar cells

Doc ID 019041 Rev 1

5/24

Equation 3

or panel set to 0. The photocurrent is equal to the current lost in the intrinsic element of the

Equation 4

Equation 5

the open circuit voltage of the solar cell. The relation between them is given in Equation 6.

Equation 6

where nb is the number of cells contained in one panel.

1.3.2

The open circuit voltage is mainly linked with the parasitic diode forward voltage then it is

temperature dependent with a negative temperature coefficient (

Strongly linked with the photocurrent, the short circuit current increases slightly with the

temperature (

Figure 3.

Isc ~ IL

IL = Io · (exp

Voc

Rp

q

KT

·Voc)

- 1) -

(

Voc =Vd

Voc =

Σ

nb

i = 1

Voc_u_i

I(V)

V

V (T2)

OC

V (T1)

OC

αV ~ -0.4% / C

oc

°

I (T2)

SC

I (T1)

SC

αI ~ + 0.05% / °C

sc

T>

2

T

1