TY - JOUR
T1 - Disentangling Dual Emission Dynamics in Lead Bromide Perovskite
AU - Fang, Hong Hua
AU - Duim, Herman
AU - Loi, Maria Antonietta
N1 - Funding Information:
H.‐H.F. acknowledges the financial support of the National Natural Science Foundation of China (No. 62075115), the National Key R&D Program of China (2022YFB4600400), and the support of Tsinghua University Initiative Scientific Research Program. H.‐H.F. and M.A.L. acknowledge the financial support of the European Research Council (ERC Starting Grant “Hy‐SPOD” No. 306983). Kovalenko group (ETH Zurich) is acknowledged for providing all‐inorganic metal halide perovskite crystals. The authors thank Simon Kahmann for the discussion.
Publisher Copyright:
© 2023 Wiley-VCH GmbH.
PY - 2023/5/4
Y1 - 2023/5/4
N2 - Metal halide perovskites exhibit intriguing properties for optoelectronic and electronic applications. Understanding their intrinsic photoexcitation and band-tail dynamics is essential for exploring novel functionality and improving device performance. This report addresses the band-tail luminescence of lead bromide perovskite (APbBr3) single crystals, where A is methylammonium, formamidinium, and cesium. Using time-resolved photoluminescence (PL) spectroscopy, the dynamics of well-defined dual emission peaks are unambiguously resolved from the picosecond to the microsecond scale. Whereas the long-lived states exhibit similar recombination dynamics at high temperatures, a clear, fast transition occurs between the high and low energy states at low temperatures, indicating direct communication between these two states. These time-resolved PL spectra shed light on the intrinsic optical properties of metal halide perovskites.
AB - Metal halide perovskites exhibit intriguing properties for optoelectronic and electronic applications. Understanding their intrinsic photoexcitation and band-tail dynamics is essential for exploring novel functionality and improving device performance. This report addresses the band-tail luminescence of lead bromide perovskite (APbBr3) single crystals, where A is methylammonium, formamidinium, and cesium. Using time-resolved photoluminescence (PL) spectroscopy, the dynamics of well-defined dual emission peaks are unambiguously resolved from the picosecond to the microsecond scale. Whereas the long-lived states exhibit similar recombination dynamics at high temperatures, a clear, fast transition occurs between the high and low energy states at low temperatures, indicating direct communication between these two states. These time-resolved PL spectra shed light on the intrinsic optical properties of metal halide perovskites.
KW - perovskites
KW - photophysics
KW - tail-state
KW - ultrafast spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=85149273328&partnerID=8YFLogxK
U2 - 10.1002/adom.202202866
DO - 10.1002/adom.202202866
M3 - Article
AN - SCOPUS:85149273328
SN - 2195-1071
VL - 11
JO - Advanced optical materials
JF - Advanced optical materials
IS - 9
M1 - 2202866
ER -