(a) A commercial cell has its maximum power output at a voltage of 450 mV and a current density of 30 mA/cm^2. If the top layer sheet resistivity is 36 ohm/cm, calculate the finger spacing which results in the fractional power loss owing to lateral current flows in the diffused top layer of 1.7%.
(b) If the bulk substrate resistivity is 1 Ωcm, calculate the substrate thickness which results in the fractional power loss due to current flow in the substrate of 0.28%.