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.
%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
}