| abstract |
An organic semiconductor laser device containing a compound represented by the following formula has a low threshold value for laser emission and has excellent laser characteristics. The ring A, the ring B and the ring C each are a aryl ring or a heteroaryl ring; Y 1 is B, P, P═O, P═S, Al, Ga, As, Si—R or Ge—R; R is an aryl group or an alkyl group; X 1 and X 2 each are O, N—R′, S or Se; R′ is an aryl group, a heteroaryl group or an alky group. |