TY - GEN
T1 - Composition tunable inorganic Lead Halide Perovskites microstructures synthesized by single and two-step chemical vapor deposition methods
AU - Hossain, Mohammad Kamal
AU - Guo, Pengfei
AU - Ho, Johnny C.
AU - Yu, Kin Man
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/5
Y1 - 2019/5
N2 - High quality all inorganic metal halide CsPb(Cl, Br, I)3 with emissions covering from blue to red (415 to 710 nm) were grown using a two-step chemical vapor deposition (CVD) process. CsPbCl3(1-x)Br3x(CsPbBr3(1-x)I3x) alloys were formed first by depositing square like microplates (∼5-25 μm) of CsPbCl3 followed by the growth of a top layer of CsPbBr3 (CsPbI3,) for different deposition time. Photoluminescence studies with front and back illumination revealed that complete interdiffusion of the halide ions occurs during the growth of the second layer. Structural, chemical and optical properties of these alloy were directly compared to those grown by a single step CVD method with emphasis on their crystalline quality, composition uniformity and stability. In this new two-step CVD process the composition of the alloys can be easily controlled by the thickness of the individual layer and only optimization of the growth of the individual halide materials is required. This offers a simple, reproducible route to realize high quality inorganic halide perovskite alloys by avoiding the tedious process optimization for different alloy composition.
AB - High quality all inorganic metal halide CsPb(Cl, Br, I)3 with emissions covering from blue to red (415 to 710 nm) were grown using a two-step chemical vapor deposition (CVD) process. CsPbCl3(1-x)Br3x(CsPbBr3(1-x)I3x) alloys were formed first by depositing square like microplates (∼5-25 μm) of CsPbCl3 followed by the growth of a top layer of CsPbBr3 (CsPbI3,) for different deposition time. Photoluminescence studies with front and back illumination revealed that complete interdiffusion of the halide ions occurs during the growth of the second layer. Structural, chemical and optical properties of these alloy were directly compared to those grown by a single step CVD method with emphasis on their crystalline quality, composition uniformity and stability. In this new two-step CVD process the composition of the alloys can be easily controlled by the thickness of the individual layer and only optimization of the growth of the individual halide materials is required. This offers a simple, reproducible route to realize high quality inorganic halide perovskite alloys by avoiding the tedious process optimization for different alloy composition.
KW - all- inorganic halide perovskites
KW - emission wavelength tuning
KW - one- and two-step CVD process
UR - https://www.scopus.com/pages/publications/85072972828
U2 - 10.1109/ICIPRM.2019.8819065
DO - 10.1109/ICIPRM.2019.8819065
M3 - 会议稿件
AN - SCOPUS:85072972828
T3 - 2019 Compound Semiconductor Week, CSW 2019 - Proceedings
BT - 2019 Compound Semiconductor Week, CSW 2019 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2019 Compound Semiconductor Week, CSW 2019
Y2 - 19 May 2019 through 23 May 2019
ER -