%0 Journal Article %1 gong2019contactless %A Gong, Xiwen %A Huang, Ziru %A Sabatini, Randy %A Tan, Chih-Shan %A Bappi, Golam %A Walters, Grant %A Proppe, Andrew %A Saidaminov, Makhsud I. %A Voznyy, Oleksandr %A Kelley, Shana O. %A Sargent, Edward H. %D 2019 %J Nature Communications %K contactless measurements photocarrier properties transport %N 1 %P 1591-- %R 10.1038/s41467-019-09538-7 %T Contactless measurements of photocarrier transport properties in perovskite single crystals %U https://doi.org/10.1038/s41467-019-09538-7 %V 10 %X The remarkable properties of metal halide perovskites arising from their impressive charge carrier diffusion lengths have led to rapid advances in solution-processed optoelectronics. Unfortunately, diffusion lengths reported in perovskite single crystals have ranged widely – from 3 μm to 3 mm – for ostensibly similar materials. Here we report a contactless method to measure the carrier mobility and further extract the diffusion length: our approach avoids both the effects of contact resistance and those of high electric field. We vary the density of quenchers – epitaxially included within perovskite single crystals – and report the dependence of excited state lifetime in the perovskite on inter-quencher spacing. Our results are repeatable and self-consistent (i.e. they agree on diffusion length for many different quencher concentrations) to within ± 6%. Using this method, we obtain a diffusion length in metal-halide perovskites of 2.6 μm ± 0.1 μm.

@article{gong2019contactless, abstract = {The remarkable properties of metal halide perovskites arising from their impressive charge carrier diffusion lengths have led to rapid advances in solution-processed optoelectronics. Unfortunately, diffusion lengths reported in perovskite single crystals have ranged widely – from 3 μm to 3 mm – for ostensibly similar materials. Here we report a contactless method to measure the carrier mobility and further extract the diffusion length: our approach avoids both the effects of contact resistance and those of high electric field. We vary the density of quenchers – epitaxially included within perovskite single crystals – and report the dependence of excited state lifetime in the perovskite on inter-quencher spacing. Our results are repeatable and self-consistent (i.e. they agree on diffusion length for many different quencher concentrations) to within ± 6%. Using this method, we obtain a diffusion length in metal-halide perovskites of 2.6 μm ± 0.1 μm.}, added-at = {2019-04-10T13:54:42.000+0200}, author = {Gong, Xiwen and Huang, Ziru and Sabatini, Randy and Tan, Chih-Shan and Bappi, Golam and Walters, Grant and Proppe, Andrew and Saidaminov, Makhsud I. and Voznyy, Oleksandr and Kelley, Shana O. and Sargent, Edward H.}, biburl = {https://www.bibsonomy.org/bibtex/2fd3a2000bbc4559610109954e7399655/sere}, doi = {10.1038/s41467-019-09538-7}, interhash = {a5aafa7f0197e744363cfda95d6f71ac}, intrahash = {fd3a2000bbc4559610109954e7399655}, issn = {20411723}, journal = {Nature Communications}, keywords = {contactless measurements photocarrier properties transport}, number = 1, pages = {1591--}, refid = {Gong2019}, timestamp = {2019-04-10T13:54:42.000+0200}, title = {Contactless measurements of photocarrier transport properties in perovskite single crystals}, url = {https://doi.org/10.1038/s41467-019-09538-7}, volume = 10, year = 2019 }