White light emission on amplified spontaneous emission with dye content controlled polymer system

White light emission from amplified spontaneous emission (ASE) was realized by optically pumping fluorescent dye 4-(dicy-anomethylene)-2-t-butyl-6(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB) doped semiconducting poly(9,9-dioctylfluorene) (PFO) polymer thin films. Two individual ASE peaks originating from DCJTB and PFO were observed by carefully controlling the DCJTB concentration in PFO. The studies of the ASE characteristics of DCJTB:PFO thin films lead to the conclusion that the DCJTB:PFO system with 0.3% w/w DCJTB dopant concentration in PFO showed the best ASE performance. In the DCJTB:PFO system with 0.3% w/w DCJTB dopant concentration, the net gains, loss coefficients, and threshold reached 36.3 and 22.35 cm(-1), 7.39 and 15.88 cm(-1), and 0.072 and 0.035 mJ pulse(-1), for DCJTB emission and PFO emission, respectively. Our results predict an approach to achieve white light emission through amplified spontaneous emission in host polymer systems via controlled dye content. (C) 2008 American Institute of Physics.