Charge separation in semicrystalline polymeric semiconductors by photoexcitation: is the mechanism intrinsic or extrinsic?
作者： Francis Paquin , Gianluca Latini , Maciej Sakowicz , Paul-Ludovic Karsenti , Linjun Wang
DOI: 10.1103/PHYSREVLETT.106.197401
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摘要: We probe charge photogeneration and subsequent recombination dynamics in neat regioregular poly(3-hexylthiophene) films over six decades time by means of time-resolved photoluminescence spectroscopy. Exciton dissociation at 10 K occurs extrinsically interfaces between molecularly ordered disordered domains. Polaron pairs thus produced recombine tunneling with distributed rates governed the distribution electron-hole radii. Quantum-chemical calculations suggest that hot-exciton such results from a high charge-transfer character.
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128.84.21.199参考文章(28)
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