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Recently, lead halide perovskites which are organic-inorganic hybrid structures, have been discovered to be highly efficient as light absorbers. Herein, we show the investigation of the excited state dynamics and emission properties
of non-stoichiometric precursor formed lead halide perovskites grown by interdiffusion method using steady-state and time-resolved spectroscopic measurements. The influence of the different ratios of the non-stoichiometric precursor solution was examined. The observed photoluminescence properties were correlated with the femtosecond
transient absorption measurements.
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Mopelola A. Idowu, Sung H. Yau, Oleg Varnavski, Theodore Goodson III, "Ultrafast time-resolved spectroscopy of lead halide perovskite films," Proc. SPIE 9562, Next Generation Technologies for Solar Energy Conversion VI, 95620K (4 September 2015); https://doi.org/10.1117/12.2187714