18 Questions
What happens to the flow of holes towards the p-side as more holes accumulate on the p-side?
The flow of holes towards the p-side becomes harder due to repulsion
What happens to the flow of electrons towards the n-side as more electrons accumulate on the n-side?
The flow of electrons towards the n-side becomes harder due to repulsion
What is the maximum voltage that can be generated in a p-n junction solar cell?
The open-circuit voltage (Voc)
What happens to the current flow in a short-circuited p-n junction solar cell?
The current flow is at its maximum (Isc)
Which of the following materials is typically used to form a p-n junction in a solar cell?
Silicon
What is the direction of current flow in a short-circuited p-n junction solar cell?
From n-side to p-side
What is the short-circuit current of a solar cell?
The photocurrent Ip
What defines the power conversion efficiency of a solar cell?
The ratio of output electrical power to incident optical power
What happens at the short-circuit condition of a solar cell?
Current is zero
What is the role of load resistance in a p-n junction solar cell?
It produces a potential difference for current flow
What does forward bias voltage in a p-n junction solar cell result in?
Forward current
What is the V-I characteristic of a solar cell at open-circuit condition?
Zero potential difference and no accumulated charges
What is the short-circuit current ($I_{sc}$) in terms of the photogenerated current ($I_p$)?
$I_{sc} = -I_p$
What is the open-circuit voltage ($V_{oc}$) in terms of the reverse saturation current ($I_0$) and the photogenerated current ($I_p$)?
$V_{oc} = \frac{k_BT}{e}\ln\left(1+\frac{I_p}{I_0}\right)$
What condition must be satisfied to find the voltage ($V_m$) that produces the maximum power output from the solar cell?
$\frac{dP}{dV} = 0$ at $V = V_m$
What is the relationship between the voltage ($V_m$) that produces the maximum power output and the open-circuit voltage ($V_{oc}$)?
$V_m = V_{oc} - \frac{k_BT}{e}\ln\left(1+\frac{I_p}{I_0}\right)$
What is the maximum power ($P_m$) delivered to the load in terms of the voltage ($V_m$) and the current ($I_m$) at the maximum power point?
$P_m = V_mI_m$
What is the purpose of the p-n junction in a solar cell?
To provide a barrier that separates the electron-hole pairs generated by light
Test your knowledge on the behavior of a PN junction diode when more holes and electrons accumulate on the p-side and n-side respectively, leading to repulsion and recombination
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