Light-matter interactions are at the heart of many physical phenomena including photocurrents in the topological insulator Bi₂Se₃. However, it is not clear whether these photocurrents stem from topological surface states or bulk bands. Time- and angle-resolved photoemission spectroscopy is used to probe the structure and dynamics of photocurrents in unoccupied electronic states of Bi₂Se₃. Here we demonstrate the use of a “time mapping” analysis to measure which initial states below the Fermi level couple to which unoccupied states via optical excitations, in a band-resolved manner. We measure the time following optical excitation for unoccupied states to reach maximum population as a function of energy and momentum; faster rise times indicate direct excitation from initial occupied states. Time mapping analysis displays promise for improving our understanding of optoelectronic effects including photocurrent generation.