\label{overlap}
Solar spectral photon irradiance ($E^{S}_{n,p,\lambda}$) and, absorption factor ($f_{\lambda}$) and  absorbed spectral photon irradiance ($E^{a}_{n,p,\lambda}$) from a H$_{2}$Bip solution (95 $\mu$M). Experiment carried out in La Plata for a clear sky day at solar noon (on September $24^{th}$, 2013).