%0 Journal Article %1 chen2016extended %A Chen, Y. %A Yi, H. T. %A Wu, X. %A Haroldson, R. %A Gartstein, Y. N. %A Rodionov, Y. I. %A Tikhonov, K. S. %A Zakhidov, A. %A Zhu, X. Y %A Podzorov, V. %D 2016 %I The Author(s) %J Nat Commun %K lifetime perovskite photocontactivity %T Extended carrier lifetimes and diffusion in hybrid perovskites revealed by Hall effect and photoconductivity measurements %U http://dx.doi.org/10.1038/ncomms12253 %V 7 %X Impressive performance of hybrid perovskite solar cells reported in recent years still awaits a comprehensive understanding of its microscopic origins. In this work, the intrinsic Hall mobility and photocarrier recombination coefficient are directly measured in these materials in steady-state transport studies. The results show that electron-hole recombination and carrier trapping rates in hybrid perovskites are very low. The bimolecular recombination coefficient (10-11 to 10-10thinspcm3thinsps-1) is found to be on par with that in the best direct-band inorganic semiconductors, even though the intrinsic Hall mobility in hybrid perovskites is considerably lower (up to 60thinspcm2thinspV-1thinsps-1). Measured here, steady-state carrier lifetimes (of up to 3thinspms) and diffusion lengths (as long as 650thinspμm) are significantly longer than those in high-purity crystalline inorganic semiconductors. We suggest that these experimental findings are consistent with the polaronic nature of charge carriers, resulting from an interaction of charges with methylammonium dipoles.

@article{chen2016extended, abstract = {Impressive performance of hybrid perovskite solar cells reported in recent years still awaits a comprehensive understanding of its microscopic origins. In this work, the intrinsic Hall mobility and photocarrier recombination coefficient are directly measured in these materials in steady-state transport studies. The results show that electron-hole recombination and carrier trapping rates in hybrid perovskites are very low. The bimolecular recombination coefficient (10-11 to 10-10[thinsp]cm3[thinsp]s-1) is found to be on par with that in the best direct-band inorganic semiconductors, even though the intrinsic Hall mobility in hybrid perovskites is considerably lower (up to 60[thinsp]cm2[thinsp]V-1[thinsp]s-1). Measured here, steady-state carrier lifetimes (of up to 3[thinsp]ms) and diffusion lengths (as long as 650[thinsp]μm) are significantly longer than those in high-purity crystalline inorganic semiconductors. We suggest that these experimental findings are consistent with the polaronic nature of charge carriers, resulting from an interaction of charges with methylammonium dipoles.}, added-at = {2016-08-09T15:44:08.000+0200}, author = {Chen, Y. and Yi, H. T. and Wu, X. and Haroldson, R. and Gartstein, Y. N. and Rodionov, Y. I. and Tikhonov, K. S. and Zakhidov, A. and Zhu, X. Y and Podzorov, V.}, biburl = {https://www.bibsonomy.org/bibtex/26ad2d0926307cf229abedf5d3d4d023f/bretschneider_m}, comment = {Supplementary information available for this article at http://www.nature.com/ncomms/2016/160801/ncomms12253/suppinfo/ncomms12253_S1.html}, description = {Extended carrier lifetimes and diffusion in hybrid perovskites revealed by Hall effect and photoconductivity measurements : Nature Communications : Nature Research}, interhash = {3b1bd56b467767652bf920a417a12a20}, intrahash = {6ad2d0926307cf229abedf5d3d4d023f}, journal = {Nat Commun}, keywords = {lifetime perovskite photocontactivity}, month = aug, publisher = {The Author(s)}, timestamp = {2016-08-09T15:44:08.000+0200}, title = {Extended carrier lifetimes and diffusion in hybrid perovskites revealed by Hall effect and photoconductivity measurements}, url = {http://dx.doi.org/10.1038/ncomms12253}, volume = 7, year = 2016 }