{'fraction_non_alphanumeric': 0.019867549668874173, 'fraction_numerical': 0.018543046357615896, 'mean_word_length': 5.048, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Direct Observation of Kinetics of Dissociation of Polaron Pairs in Electrical Field

Kinetics of decay of polaron pairs as precursors of free charge carriers upon photoexcitation of poly(3-octylthiphene) films was observed directly within a picosecond time domain by using the two-correlated-pulses laser technique. Experiments showed that polaron pairs were generated without any noticeable delay after the light absorption. Two kinds of polaron pairs with lifetimes of about τ1≈10 ps and τ2≈200 ps were revealed the lifetimes were temperature-independent in the zero electrical field. The value of τ2 was shown to decrease in a higher electrical field reaching about 30 ps at E=105 V/cm. Free charge carriers appear as a result of the pair dissociation.