Heterocyclic compound, organic light emitting device including same, and electronic device including organic light emitting device

A heterocyclic compound, an organic light-emitting device including the same, and an electronic device including the organic light-emitting device are provided. The heterocyclic compound is represented by Formula 1: wherein Y1 is B, N, P, P (= O), or P (= S), X1 and X2 are each independently a single bond, O, S, Se, N [(CY5)-Ar2], N (R1), C (R1) (R2), etc., k1 is 0 or 1, k2 is 0 or 1, the sum of k1 and k2 is greater than or equal to 1, CY1 to CY3 are each independently a C5-C30 carbocyclic group or a C1-C30 heterocyclic group, and CY1 to CY3 are each independently a C5-C30 carbocyclic group or a C1-C30 heterocyclic group. CY4 and CY5 are each independently a C5-C30 carbocyclic group unsubstituted or substituted by at least one R40 or a C1-C30 heterocyclic group unsubstituted or substituted by at least one R40, Ar1 and Ar2 are each independently a group represented by Formula 2, and the remaining groups and variables are as described in the detailed specification. Formula 1 # imgabs 0 # and formula 2 # imgabs