Evidence for photogenerated intermediate hole polarons in ZnO. Sezen, H., Shang, H., Bebensee, F., Yang, C., Buchholz, M., Nefedov, A., Heissler, S., Carbogno, C., Scheffler, M., Rinke, P., & Wöll, C. Nature Communications, 6(1):6901, dec, 2015. ![Evidence for photogenerated intermediate hole polarons in ZnO [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex 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{Sezen2015,
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.},
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 W{\"{o}}ll, Christof},
doi = {10.1038/ncomms7901},
file = {:C$\backslash$:/Users/shanghui/AppData/Local/Mendeley Ltd./Mendeley Desktop/Downloaded/Sezen et al. - 2015 - Evidence for photogenerated intermediate hole polarons in ZnO(2).pdf:pdf},
issn = {2041-1723},
journal = {Nature Communications},
month = {dec},
number = {1},
pages = {6901},
pmid = {25902307},
title = {{Evidence for photogenerated intermediate hole polarons in ZnO}},
url = {http://www.nature.com/articles/ncomms7901},
volume = {6},
year = {2015}
}
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