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This paper proposes an approach to enhance the electroluminescence of conjugated polymers through cartier collision.The main process is that,under certain applied electrical field,the charged bipolarons can be injected and be driven to collide with neutral triplet exciton who generally doesnt contribute to the electroluminescence of conjugated polymers.The collision annihilates the original carriers and leads to a light-emitting effect,finnally producing two polarons,which also provides a picture to dynamically discover the mechanism of the field-induced electroluminescene enhancement in recent experiments.