Conjugation-Length Dependence of Spin-Dependent Exciton Formation Rates in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Π</mml:mi></mml:math>-Conjugated Oligomers and Polymers
We have measured the ratio, r = sigma(S)/sigma(T) of the formation cross section, sigma of singlet and triplet excitons from polarons in pi-conjugated oligomer and polymer films...