Sub-10fs Photocurrent and Photoluminescence Action Spectroscopies of Organic Optoelectronic Devices Reveals Ultrafast Formation of Bound Excitonic States

Marios Maimaris,Allan J. Pettipher,Mohammed Azzouzi,Daniel J. Walke,Xijia Zheng,Andrei Gorodetsky,Yifan Dong,Pabitra Shakya Tuladhar,Helder Crespo,Jenny Nelson,John W. G. Tisch,Artem A. Bakulin

The International Conference on Ultrafast Phenomena (UP) 2022（2022）

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摘要

We apply ultrafast pump-push-photocurrent and pump-push-photoluminescence spectroscopies to polyfluorene organic diode to track in time the bound exciton formation. ‘Cold’-excitons become bound within 10-fs while ‘hot’-excitons can dissociate spontaneously within 50-fs before acquiring bound character.

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