%0 Journal Article %1 fang2018longlived %A Fang, Hong-Hua %A Adjokatse, Sampson %A Shao, Shuyan %A Even, Jacky %A Loi, Maria Antonietta %D 2018 %J Nature Communications %K PL-measuring hot_carrier perovskite %N 1 %P 243-- %R 10.1038/s41467-017-02684-w %T Long-lived hot-carrier light emission and large blue shift in formamidinium tin triiodide perovskites %U https://doi.org/10.1038/s41467-017-02684-w %V 9 %X A long-lived hot carrier population is critical in order to develop working hot carrier photovoltaic devices with efficiencies exceeding the Shockley–Queisser limit. Here, we report photoluminescence from hot-carriers with unexpectedly long lifetime (a few ns) in formamidinium tin triiodide. An unusual large blue shift of the time-integrated photoluminescence with increasing excitation power (150 meV at 24 K and 75 meV at 293 K) is displayed. On the basis of the analysis of energy-resolved and time-resolved photoluminescence, we posit that these phenomena are associated with slow hot carrier relaxation and state-filling of band edge states. These observations are both important for our understanding of lead-free hybrid perovskites and for an eventual future development of efficient lead-free perovskite photovoltaics.

@article{fang2018longlived, abstract = {A long-lived hot carrier population is critical in order to develop working hot carrier photovoltaic devices with efficiencies exceeding the Shockley–Queisser limit. Here, we report photoluminescence from hot-carriers with unexpectedly long lifetime (a few ns) in formamidinium tin triiodide. An unusual large blue shift of the time-integrated photoluminescence with increasing excitation power (150 meV at 24 K and 75 meV at 293 K) is displayed. On the basis of the analysis of energy-resolved and time-resolved photoluminescence, we posit that these phenomena are associated with slow hot carrier relaxation and state-filling of band edge states. These observations are both important for our understanding of lead-free hybrid perovskites and for an eventual future development of efficient lead-free perovskite photovoltaics.}, added-at = {2018-07-02T15:09:47.000+0200}, author = {Fang, Hong-Hua and Adjokatse, Sampson and Shao, Shuyan and Even, Jacky and Loi, Maria Antonietta}, biburl = {https://www.bibsonomy.org/bibtex/2561c60c48a36f00692dc4d2c111ef98b/bretschneider_m}, doi = {10.1038/s41467-017-02684-w}, interhash = {b5e7c791d4e97c854373e3fc95aa6aea}, intrahash = {561c60c48a36f00692dc4d2c111ef98b}, issn = {20411723}, journal = {Nature Communications}, keywords = {PL-measuring hot_carrier perovskite}, number = 1, pages = {243--}, refid = {Fang2018}, timestamp = {2018-07-02T15:09:47.000+0200}, title = {Long-lived hot-carrier light emission and large blue shift in formamidinium tin triiodide perovskites}, url = {https://doi.org/10.1038/s41467-017-02684-w}, volume = 9, year = 2018 }