The proposed mechanism for this cross-electrophile coupling is outlined in Fig 2a . Upon visible light excitation, the in situ generated LnPd(0) complex would access a triplet excited state species [LnPd(0)]* (2). In the excited state, an open coordination site can selectively allow the association of aryl iodide/triflate 3 with Pd center, thereby furnishing a hybrid aryl Pd(I)-radical species 4 via an inner sphere single electron transfer (SET). In the crosscoupling cycle, the Pd(0) species, generated in-situ from a Pd(II) precatalyst is expected to undergo facile oxidative addition into an aryl bromide/chloride (6) to form an aryl Pd(II) species 7. The hybrid aryl Pd(I)-radical species 4 would mediate aryl group transfer to 7, affording the Pd(III) intermediate ( ) . Subsequently, the reductive elimination from the Pd(III) metal center would forge the requisite CC bond, leading to the (hetero)biaryl product 9 and expelling the Pd(I) intermediate 10. Finally, the regeneration of active Pd(0) catalyst would be achieved in presence of base , thereby simultaneously completing both the catalytic cycle.