A new type of processable green-emissive polymer containing alkylsilylphenyl units was synthesized via Gilch polymerization. The resulting polymer was soluble in organic solvents and was spin-cast to make a thin film. A light-emitting diode was fabricated by the polymer being sandwiched between indium tin oxide and metal electrodes. A strong green emission at 524 nm was observed from the various device configurations made by the newly synthesized polymer. The polymer had a strong absorption band around 427 nm that was attributable to a pi-pi*: transition of the conjugated segments of the polymer. A current-voltage-luminance curve showed typical rectifying diode characteristics. The polymer had a very high molecular weight (number-average molecular weight = similar to 300,000) with a polydispersity of about 3 and good thermal stability up to 400 degreesC. The brightness at 13 and 17 V was about 1000 and 5900 cd/m(2), respectively.