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Controlled Growth and Reliable Thickness‐Dependent Properties of Organic–Inorganic Perovskite Platelet Crystal
Author(s) -
Niu Lin,
Zeng Qingsheng,
Shi Jia,
Cong Chunxiao,
Wu Chunyang,
Liu Fucai,
Zhou Jiadong,
Fu Wei,
Fu Qundong,
Jin Chuanhong,
Yu Ting,
Liu Xinfeng,
Liu Zheng
Publication year - 2016
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201601392
Subject(s) - materials science , perovskite (structure) , halide , photoluminescence , raman spectroscopy , fabrication , crystal (programming language) , optoelectronics , exciton , nanometre , nanotechnology , chemical engineering , inorganic chemistry , optics , composite material , chemistry , medicine , physics , alternative medicine , pathology , quantum mechanics , computer science , engineering , programming language
Organolead halide perovskites (e.g., CH 3 NH 3 PbI 3 ) have caught tremendous attention for their excellent optoelectronic properties and applications, especially as the active material for solar cells. Perovskite crystal quality and dimension is crucial for the fabrication of high‐performance optoelectronic and photovoltaic devices. Herein the controlled synthesis of organolead halide perovskite CH 3 NH 3 PbI 3 nanoplatelets on SiO 2 /Si substrates is investigated via a convenient two‐step vapor transport deposition technique. The thickness and size of the perovskite can be well‐controlled from few‐layers to hundred nanometers by altering the synthesis time and temperature. Raman characterizations reveal that the evolutions of Raman peaks are sensitive to the thickness. Furthermore, from the time‐resolved photoluminescence measurements, the best optoelectronic performance of the perovskite platelet is attributed with thickness of ≈30 nm to its dominant longest lifetime (≈4.5 ns) of perovskite excitons, which means lower surface traps or defects. This work supplies an alternative to the synthesis of high‐quality organic perovskite and their possible optoelectronic applications with the most suitable materials.