@article{Meyer_2019,
doi = {10.1088/1742-6596/1190/1/012009},
url = {https://dx.doi.org/10.1088/1742-6596/1190/1/012009},
year = {2019},
month = {may},
publisher = {IOP Publishing},
volume = {1190},
number = {1},
pages = {012009},
author = {T Meyer and B Kressdorf and J Lindner and P Peretzki and V Roddatis and C Jooss and M Seibt},
title = {High-resolution Scanning Transmission EBIC Analysis of Misfit Dislocations at Perovskite pn-Heterojunctions},
journal = {Journal of Physics: Conference Series},
abstract = {Fundamental losses of photovoltaic energy conversion are transmission of sub band gap photons and thermalisation which are the underlying physics of the Shockley-Queisser limit defining maximum conversion efficiency of single-junction solar cells. Strongly correlated materials such as perovskites are promising candidates to exceed this limit by exploiting (i) long wavelength light absorption and (ii) the existence of long-living intraband excitations indicating that harvesting hot excess carriers might be feasible in such systems. In this work, we study pn-heterojunctions produced from Pr1-xCaxMnO3 on SrTi1-yNbyO3 by means of microscopic techniques. Such systems exhibit relevant quantities such as space charge layer width, screening lengths and excess carrier diffusion lengths in the 1-10 nm range which makes the use of standard methods such as electron beam induced current a challenging task. We report scanning transmission electron beam induced current experiments of misfit dislocations at the heterojunction. The dislocation-induced reduction of the charge collection is studied with nanometer spatial resolution. Effects of surface recombination and the heterojunction electric field are discussed.}
}

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Effects of surface recombination and the heterojunction electric field are discussed.","bibtex":"@article{Meyer_2019,\r\ndoi = {10.1088/1742-6596/1190/1/012009},\r\nurl = {https://dx.doi.org/10.1088/1742-6596/1190/1/012009},\r\nyear = {2019},\r\nmonth = {may},\r\npublisher = {IOP Publishing},\r\nvolume = {1190},\r\nnumber = {1},\r\npages = {012009},\r\nauthor = {T Meyer and B Kressdorf and J Lindner and P Peretzki and V Roddatis and C Jooss and M Seibt},\r\ntitle = {High-resolution Scanning Transmission EBIC Analysis of Misfit Dislocations at Perovskite pn-Heterojunctions},\r\njournal = {Journal of Physics: Conference Series},\r\nabstract = {Fundamental losses of photovoltaic energy conversion are transmission of sub band gap photons and thermalisation which are the underlying physics of the Shockley-Queisser limit defining maximum conversion efficiency of single-junction solar cells. Strongly correlated materials such as perovskites are promising candidates to exceed this limit by exploiting (i) long wavelength light absorption and (ii) the existence of long-living intraband excitations indicating that harvesting hot excess carriers might be feasible in such systems. In this work, we study pn-heterojunctions produced from Pr1-xCaxMnO3 on SrTi1-yNbyO3 by means of microscopic techniques. Such systems exhibit relevant quantities such as space charge layer width, screening lengths and excess carrier diffusion lengths in the 1-10 nm range which makes the use of standard methods such as electron beam induced current a challenging task. We report scanning transmission electron beam induced current experiments of misfit dislocations at the heterojunction. The dislocation-induced reduction of the charge collection is studied with nanometer spatial resolution. 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