%0 Journal Article %1 sezen2015evidence %A Sezen, Hikmet %A Shang, Honghui %A Bebensee, Fabian %A Yang, Chengwu %A Buchholz, Maria %A Nefedov, Alexei %A Heissler, Stefan %A Carbogno, Christian %A Scheffler, Matthias %A Rinke, Patrick %A others, %D 2015 %I Nature Publishing Group %J Nature communications %K ZnO polarons theory %P 6901 %T Evidence for photogenerated intermediate hole polarons in ZnO %V 6 %X Despite their pronounced importance for oxide-based photochemistry, optoelectronics and photovoltaics, only fairly little is known about the polaron lifetimes and binding energies. Polarons represent a crucial intermediate step populated immediately after dissociation of the excitons formed in the primary photoabsorption process. Here we present a novel approach to studying photoexcited polarons in an important photoactive oxide, ZnO, using infrared (IR) reflection–absorption spectroscopy (IRRAS) with a time resolution of 100 ms. For well-defined (10-10) oriented ZnO single-crystal substrates, we observe intense IR absorption bands at around 200 meV exhibiting a pronounced temperature dependence. On the basis of first-principles-based electronic structure calculations, we assign these features to hole polarons of intermediate coupling strength.

@article{sezen2015evidence, abstract = {Despite their pronounced importance for oxide-based photochemistry, optoelectronics and photovoltaics, only fairly little is known about the polaron lifetimes and binding energies. Polarons represent a crucial intermediate step populated immediately after dissociation of the excitons formed in the primary photoabsorption process. Here we present a novel approach to studying photoexcited polarons in an important photoactive oxide, ZnO, using infrared (IR) reflection–absorption spectroscopy (IRRAS) with a time resolution of 100 ms. For well-defined (10-10) oriented ZnO single-crystal substrates, we observe intense IR absorption bands at around 200 meV exhibiting a pronounced temperature dependence. On the basis of first-principles-based electronic structure calculations, we assign these features to hole polarons of intermediate coupling strength.}, added-at = {2019-07-12T20:54:06.000+0200}, author = {Sezen, Hikmet and Shang, Honghui and Bebensee, Fabian and Yang, Chengwu and Buchholz, Maria and Nefedov, Alexei and Heissler, Stefan and Carbogno, Christian and Scheffler, Matthias and Rinke, Patrick and others}, biburl = {https://www.bibsonomy.org/bibtex/28f5d883bb626492a5ecf976e37e1a503/skoerbel}, interhash = {b4f2513a164742bdb5bbf38cf14d6047}, intrahash = {8f5d883bb626492a5ecf976e37e1a503}, journal = {Nature communications}, keywords = {ZnO polarons theory}, pages = 6901, publisher = {Nature Publishing Group}, timestamp = {2019-07-12T20:54:06.000+0200}, title = {Evidence for photogenerated intermediate hole polarons in ZnO}, volume = 6, year = 2015 }