Which statement about the External Quantum Efficiency characterisation method is false? A solar cell under reverse bias has an equal or increased EQE response compared to the short-circuit condition. A low response in the short wavelength region can be increased by decreasing the layer thickness or by increasing the bandgap of the emitter layer. The internal quantum efficiency (IQE) is obtained from the EQE curve and reflectance/transmittance data by IQE = EQE/(1 R-T). An EQE measurement is essential to adjust a JV-measurement for spectral mismatch of a solar simulator and obtain the correct Jsc at zero applied bias