TY - JOUR
T1 - Morphology-Independent Stable White-Light Emission from Self-Assembled Two-Dimensional Perovskites Driven by Strong Exciton-Phonon Coupling to the Organic Framework
AU - Thirumal, Krishnamoorthy
AU - Chong, Wee Kiang
AU - Xie, Wei
AU - Ganguly, Rakesh
AU - Muduli, Subas Kumar
AU - Sherburne, Matthew
AU - Asta, Mark
AU - Mhaisalkar, Subodh
AU - Sum, Tze Chien
AU - Soo, Han Sen
AU - Mathews, Nripan
N1 - Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/5/9
Y1 - 2017/5/9
N2 - Hybrid two-dimensional (2D) lead halide perovskites have been employed in optoelectronic applications, including white-light emission for light-emitting diodes (LEDs). However, until now, there have been limited reports about white-light-emitting lead halide perovskites with experimental insights into the mechanism of the broadband emission. Here, we present white-light emission from a 2D hybrid lead chloride perovskite, using the widely known phenethylammonium cation. The single-crystal X-ray structural data, time-resolved photophysical measurements, and density functional theory calculations are consistent with broadband emission arising from strong exciton-phonon coupling with the organic lattice, which is independent of surface defects. The phenethylammonium lead chloride material exhibits a remarkably high color rendering index of 84, a CIE coordinate of (0.37,0.42), a CCT of 4426, and photostability, making it ideal for natural white LED applications.
AB - Hybrid two-dimensional (2D) lead halide perovskites have been employed in optoelectronic applications, including white-light emission for light-emitting diodes (LEDs). However, until now, there have been limited reports about white-light-emitting lead halide perovskites with experimental insights into the mechanism of the broadband emission. Here, we present white-light emission from a 2D hybrid lead chloride perovskite, using the widely known phenethylammonium cation. The single-crystal X-ray structural data, time-resolved photophysical measurements, and density functional theory calculations are consistent with broadband emission arising from strong exciton-phonon coupling with the organic lattice, which is independent of surface defects. The phenethylammonium lead chloride material exhibits a remarkably high color rendering index of 84, a CIE coordinate of (0.37,0.42), a CCT of 4426, and photostability, making it ideal for natural white LED applications.
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U2 - 10.1021/acs.chemmater.7b00073
DO - 10.1021/acs.chemmater.7b00073
M3 - Article
AN - SCOPUS:85019161588
SN - 0897-4756
VL - 29
SP - 3947
EP - 3953
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 9
ER -