Exciton—Exciton Collision Ionization in Anthracene Crystal

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Abstract
A hopping model for excitons is used to calculate the rate constant for electron—hole production due to exciton—exciton collision annihilation. The value for the rate constant obtained using a more recent value for the conduction‐band edge and better orthogonalization scheme is 3.0×10−11 cm3 sec−1. This is an order of magnitude greater than the value 2.5×10−12 cm3 sec−1 obtained by Choi and Rice using the coherent model. The only experimental measurement is by Silver, Olness, Swicord, and Jarnagin which gives 5×10−12 cm3 sec−1 for the rate constant.